Liquid Fuels Systems-CDC3E452 (Vol.5)

1. (802) The positions of the pump control selector switch are

HAND/OFF.

HAND/AUTO.

HAND/OFF/AUTO

HAND/OFF/MANUAL

The correct answer is HAND/OFF/AUTO because these are the positions of the pump control selector switch. In the HAND position, the pump is manually controlled. In the OFF position, the pump is turned off. In the AUTO position, the pump is automatically controlled based on certain conditions or settings. This combination of positions allows for manual, automatic, and off operation of the pump.

Explanation

The correct answer is HAND/OFF/AUTO because these are the positions of the pump control selector switch. In the HAND position, the pump is manually controlled. In the OFF position, the pump is turned off. In the AUTO position, the pump is automatically controlled based on certain conditions or settings. This combination of positions allows for manual, automatic, and off operation of the pump.

2. (803) Emergency stop switches are painted what color?

Red

Amber

Orange

Yellow

Emergency stop switches are painted red because red is a universally recognized color for danger and emergencies. Using red for emergency stop switches helps to ensure that they are easily identifiable and distinguishable from other switches or controls in a potentially hazardous situation. This color coding system helps to promote safety by allowing individuals to quickly locate and activate the emergency stop switch in case of an emergency or when immediate action is required to stop a machine or process.

Explanation

Emergency stop switches are painted red because red is a universally recognized color for danger and emergencies. Using red for emergency stop switches helps to ensure that they are easily identifiable and distinguishable from other switches or controls in a potentially hazardous situation. This color coding system helps to promote safety by allowing individuals to quickly locate and activate the emergency stop switch in case of an emergency or when immediate action is required to stop a machine or process.

3. (807) The primary purpose of the orifice plate on the 302AF fueling and defueling valve is to create a differential pressure

To operate the CDHS-2

To operate the CDHS-3

To operate the CDHS-4

To operate the CDHS-5

The orifice plate on the 302AF fueling and defueling valve is used to create a differential pressure. This differential pressure is necessary to operate the CDHS-3.

Explanation

The orifice plate on the 302AF fueling and defueling valve is used to create a differential pressure. This differential pressure is necessary to operate the CDHS-3.

4. (814) What would be a prime suspect if you noticed a 50AF-2 pressure relief valve pulsating during a refueling operation?

Loose diaphragm washer

Obstruction in main valve

Clogged cover-chamber tubing

Air in main valve cover chamber

If a 50AF-2 pressure relief valve is pulsating during a refueling operation, the most likely cause would be air trapped in the main valve cover chamber. This can disrupt the normal flow of fluid and cause pulsations in the valve. The other options, such as a loose diaphragm washer, obstruction in the main valve, or clogged cover-chamber tubing, may cause other issues but are less likely to result in pulsations.

Explanation

If a 50AF-2 pressure relief valve is pulsating during a refueling operation, the most likely cause would be air trapped in the main valve cover chamber. This can disrupt the normal flow of fluid and cause pulsations in the valve. The other options, such as a loose diaphragm washer, obstruction in the main valve, or clogged cover-chamber tubing, may cause other issues but are less likely to result in pulsations.

5. (817) When the piping system of the Type II is not cathodically protected, to what are hydrant outlets grounded?

A tin grounding rod

A cast steel grounding rod

A black iron grounding rod

A galvanized grounding rod

When the piping system of the Type II is not cathodically protected, the hydrant outlets are grounded to a galvanized grounding rod. This is because galvanized grounding rods are designed to provide a reliable and low-resistance path for electrical currents to flow into the ground. By grounding the hydrant outlets to a galvanized grounding rod, any stray electrical currents or potential surges can be safely discharged into the ground, preventing damage to the piping system and ensuring the safety of the surrounding area.

Explanation

When the piping system of the Type II is not cathodically protected, the hydrant outlets are grounded to a galvanized grounding rod. This is because galvanized grounding rods are designed to provide a reliable and low-resistance path for electrical currents to flow into the ground. By grounding the hydrant outlets to a galvanized grounding rod, any stray electrical currents or potential surges can be safely discharged into the ground, preventing damage to the piping system and ensuring the safety of the surrounding area.

6. (831) What is the primary method of receiving fuel in a Type IV system?

Barges or pipelines

Railroad

Air Force truck

Commercial trucks

In a Type IV system, the primary method of receiving fuel is through barges or pipelines. This means that fuel is transported through waterways or underground pipelines to the designated location. Barges are commonly used for transporting large quantities of fuel over water, while pipelines are used for long-distance transportation of fuel. This method ensures a continuous and efficient supply of fuel to the system.

Explanation

In a Type IV system, the primary method of receiving fuel is through barges or pipelines. This means that fuel is transported through waterways or underground pipelines to the designated location. Barges are commonly used for transporting large quantities of fuel over water, while pipelines are used for long-distance transportation of fuel. This method ensures a continuous and efficient supply of fuel to the system.

7. (808) When you adjust the 302AF fueling and defueling valve, at what rate do you set the CV flow control?

10 seconds

20 seconds

30 seconds

40 seconds

When adjusting the 302AF fueling and defueling valve, the CV flow control should be set at a rate of 20 seconds. This means that it will take 20 seconds for the valve to fully open or close, allowing for a controlled and gradual flow of fuel or defuel. This rate ensures that the adjustments are made smoothly and accurately, preventing any sudden or drastic changes in fuel flow.

Explanation

When adjusting the 302AF fueling and defueling valve, the CV flow control should be set at a rate of 20 seconds. This means that it will take 20 seconds for the valve to fully open or close, allowing for a controlled and gradual flow of fuel or defuel. This rate ensures that the adjustments are made smoothly and accurately, preventing any sudden or drastic changes in fuel flow.

8. (805) What do most emergency service calls involve?

Electrical shorts

No delivery of fuel

Minor leaks

Jammed valves

Most emergency service calls likely involve situations where there is no delivery of fuel. This could include scenarios such as a car running out of gas, a fuel pump failure, or a problem with the fuel line. These types of situations can be urgent as they can leave individuals stranded or unable to operate their vehicles.

Explanation

Most emergency service calls likely involve situations where there is no delivery of fuel. This could include scenarios such as a car running out of gas, a fuel pump failure, or a problem with the fuel line. These types of situations can be urgent as they can leave individuals stranded or unable to operate their vehicles.

9. (806) The defuel line in the Panero hydrant system pit has a 'U' bend to

Allow for expansion

Absorb hydraulic shock

Keep the entire line from draining

Provide a place for priming the pump

The defuel line in the Panero hydrant system pit has a 'U' bend to keep the entire line from draining. This is important because if the line were to completely drain, it would require additional time and effort to refill it before it can be used again. By having a 'U' bend, it creates a low point in the line where fuel can collect and prevent it from fully draining. This ensures that the line is always ready for immediate use without any delays or complications.

Explanation

The defuel line in the Panero hydrant system pit has a 'U' bend to keep the entire line from draining. This is important because if the line were to completely drain, it would require additional time and effort to refill it before it can be used again. By having a 'U' bend, it creates a low point in the line where fuel can collect and prevent it from fully draining. This ensures that the line is always ready for immediate use without any delays or complications.

10. (812) Which of these would probably cause the 90AF-8 refueling control vavlve to open, then close?

Hytrol A closing

CDHS-3 tripping

Solenoid not energized

When the CDHS-3 trips, it means that there is a fault or failure in the CDHS-3 system. This fault could potentially cause a loss of power or signal to the 90AF-8 refueling control valve. As a result, the valve would open due to the loss of control, but then quickly close again as the system detects the fault and attempts to correct it. Therefore, the CDHS-3 tripping would likely cause the 90AF-8 refueling control valve to open and then close.

Explanation

When the CDHS-3 trips, it means that there is a fault or failure in the CDHS-3 system. This fault could potentially cause a loss of power or signal to the 90AF-8 refueling control valve. As a result, the valve would open due to the loss of control, but then quickly close again as the system detects the fault and attempts to correct it. Therefore, the CDHS-3 tripping would likely cause the 90AF-8 refueling control valve to open and then close.

11. (801) The Class 1, Division 2, hazardous area around a service station dispenser extends outward how many feet and upward how many inches?

20 feet, 18 inches

20 feet, 24 inches

50 feet, 18 inches

50 feet, 24 inches

The Class 1, Division 2 hazardous area around a service station dispenser extends outward 20 feet and upward 18 inches.

Explanation

The Class 1, Division 2 hazardous area around a service station dispenser extends outward 20 feet and upward 18 inches.

12. (803) The emergency stop switches have what type of contacts and complete which circuits?

Open; low-voltage for the fuel transfer pump control

Closed; low-voltage for the fuel transfer pump control

Open; high-voltage for the fuel transfer pump control

Closed; high-voltage for the fuel transfer pump control

The emergency stop switches have closed contacts and complete the low-voltage circuit for the fuel transfer pump control. This means that when the emergency stop switch is activated, the contacts close and allow the low-voltage current to flow through, activating the fuel transfer pump control.

Explanation

The emergency stop switches have closed contacts and complete the low-voltage circuit for the fuel transfer pump control. This means that when the emergency stop switch is activated, the contacts close and allow the low-voltage current to flow through, activating the fuel transfer pump control.

13. (820) What type of control tubing is used on the Type III system?

Copper

Carbon steel

Galvanized steel

Seamless stainless steel

Seamless stainless steel is used as the control tubing on the Type III system. This type of tubing is preferred because it is resistant to corrosion, which is important for maintaining the integrity and safety of the system. Additionally, seamless stainless steel tubing has a smooth interior surface, which helps to minimize pressure drop and ensure efficient flow of fluids or gases through the system.

Explanation

Seamless stainless steel is used as the control tubing on the Type III system. This type of tubing is preferred because it is resistant to corrosion, which is important for maintaining the integrity and safety of the system. Additionally, seamless stainless steel tubing has a smooth interior surface, which helps to minimize pressure drop and ensure efficient flow of fluids or gases through the system.

14. (832) Once a Type IV operating storage tank high-level alarm has been activated and acknowledged by the operator, when does the high-level light go out?

When the operator acknowledges the alarm

When the high-high-level alarm is activated

When fuel is removed to a level below the low-level alarm setting

When fuel is removed to a level below the high-level alarm setting

When fuel is removed to a level below the high-level alarm setting, the high-level light goes out. This means that once the fuel level drops below the threshold at which the high-level alarm is triggered, the alarm is no longer active and the light indicating the high-level alarm is turned off.

Explanation

When fuel is removed to a level below the high-level alarm setting, the high-level light goes out. This means that once the fuel level drops below the threshold at which the high-level alarm is triggered, the alarm is no longer active and the light indicating the high-level alarm is turned off.

15. (817) Suppose you are testing a magnetic switch. what reading is shown on the ohmmeter when the magnet is placed on the switch plate?

Zero

Infinity

A fixed reading between zero and infinity

A fluctuating reading between zero and infinity

When a magnet is placed on the switch plate of a magnetic switch, the reading on the ohmmeter will show zero. This is because the magnet attracts the metal contacts inside the switch, causing them to come into contact and complete the circuit. When the circuit is closed, there is no resistance, resulting in a reading of zero on the ohmmeter.

Explanation

When a magnet is placed on the switch plate of a magnetic switch, the reading on the ohmmeter will show zero. This is because the magnet attracts the metal contacts inside the switch, causing them to come into contact and complete the circuit. When the circuit is closed, there is no resistance, resulting in a reading of zero on the ohmmeter.

16. (829) When must a Type III system be flushed?

When the system is not used in 30 days

Before serving an aircraft

After defueling an aircraft

Every day

A Type III system must be flushed when it is not used in 30 days because stagnant water in the system can lead to the growth of bacteria, which can contaminate the water supply. Flushing the system helps to remove any stagnant water and ensure that the water supply remains clean and safe for use.

Explanation

A Type III system must be flushed when it is not used in 30 days because stagnant water in the system can lead to the growth of bacteria, which can contaminate the water supply. Flushing the system helps to remove any stagnant water and ensure that the water supply remains clean and safe for use.

17. (807) What indicated leakage past the diaphragm on the pressure relief control?

Uncontrolled downstream flow

Fuel leakage from the vent port

Uncontrolled downstream pressure

Fuel leaking from the disc removal plug

Fuel leakage from the vent port indicates leakage past the diaphragm on the pressure relief control. The vent port is designed to release excess pressure, and if fuel is leaking from it, it suggests that the diaphragm is not properly sealing and allowing fuel to escape. This can lead to uncontrolled downstream flow and potentially unsafe conditions.

Explanation

Fuel leakage from the vent port indicates leakage past the diaphragm on the pressure relief control. The vent port is designed to release excess pressure, and if fuel is leaking from it, it suggests that the diaphragm is not properly sealing and allowing fuel to escape. This can lead to uncontrolled downstream flow and potentially unsafe conditions.

18. (813) Why is the main valve body of the 50AF-2 pressure relief valve installed with the flow under the disc?

To increase system pressure

So the main diaphragm will operate properly

To provide a smoother low through the valve

For system safety in case the main valve diaphragm ruptures

The main valve body of the 50AF-2 pressure relief valve is installed with the flow under the disc for system safety in case the main valve diaphragm ruptures. This configuration ensures that if the diaphragm fails, the pressure relief valve will still be able to relieve excess pressure and prevent damage to the system. By having the flow under the disc, any pressure buildup will push the disc against the seat, effectively sealing off the flow and preventing further pressure increase. This helps to safeguard the system and prevent potential hazards or accidents.

Explanation

The main valve body of the 50AF-2 pressure relief valve is installed with the flow under the disc for system safety in case the main valve diaphragm ruptures. This configuration ensures that if the diaphragm fails, the pressure relief valve will still be able to relieve excess pressure and prevent damage to the system. By having the flow under the disc, any pressure buildup will push the disc against the seat, effectively sealing off the flow and preventing further pressure increase. This helps to safeguard the system and prevent potential hazards or accidents.

19. (807) What component closes the refueling side of the 302AF fueling and defueling valve when there is excess flow at the hydrant outlet?

CRD

CDHS-3

Loading CRL

CV flow control

CDHS-3 is the component that closes the refueling side of the 302AF fueling and defueling valve when there is excess flow at the hydrant outlet.

Explanation

CDHS-3 is the component that closes the refueling side of the 302AF fueling and defueling valve when there is excess flow at the hydrant outlet.

20. (822) Where is the float assembly for the 413AF-5A high-level shutoff valve on an aboveground operating storage tank located?

On top of the tank in the float well

On top of the tank in the gauging well

On the exterior side of the tank at the required shutoff height

On the interior side of the tank at the required shutoff height

The float assembly for the 413AF-5A high-level shutoff valve on an aboveground operating storage tank is located on the exterior side of the tank at the required shutoff height.

Explanation

The float assembly for the 413AF-5A high-level shutoff valve on an aboveground operating storage tank is located on the exterior side of the tank at the required shutoff height.

21. (801) What type of ground rod, if any, is used on a horizontal fuel tank installed under the pump-house floor?

Copper

Galvanized

Stainless steel

Not required

The correct answer is "Not required" because a ground rod is not necessary for a horizontal fuel tank installed under the pump-house floor. Ground rods are typically used to provide grounding for electrical systems and equipment, but in this case, there is no need for grounding as the tank is installed underground and does not pose a risk of electrical hazards.

Explanation

The correct answer is "Not required" because a ground rod is not necessary for a horizontal fuel tank installed under the pump-house floor. Ground rods are typically used to provide grounding for electrical systems and equipment, but in this case, there is no need for grounding as the tank is installed underground and does not pose a risk of electrical hazards.

22. (803) Emergency stop switches at a truck loading header must be no closer than how many feet?

10

25

50

100

Emergency stop switches at a truck loading header must be no closer than 25 feet. This distance ensures that the switch is easily accessible in case of an emergency, allowing for quick and efficient response to stop any potential hazards or accidents. Placing the switch at a closer distance may increase the risk of accidental activation or hinder accessibility during critical situations.

Explanation

Emergency stop switches at a truck loading header must be no closer than 25 feet. This distance ensures that the switch is easily accessible in case of an emergency, allowing for quick and efficient response to stop any potential hazards or accidents. Placing the switch at a closer distance may increase the risk of accidental activation or hinder accessibility during critical situations.

23. (805) If the pump is running, what should be your first stop in diagnosing a fuel delivery problem?

Pump

Valves

As-built drawing

Fuel storage tank

The correct answer is As-built drawing. When diagnosing a fuel delivery problem, the first stop should be to consult the as-built drawing. This drawing provides detailed information about the layout and configuration of the fuel delivery system, including the location of the pump, valves, and fuel storage tank. By referring to the as-built drawing, one can identify any potential issues or malfunctions in the system and proceed with further troubleshooting accordingly.

Explanation

The correct answer is As-built drawing. When diagnosing a fuel delivery problem, the first stop should be to consult the as-built drawing. This drawing provides detailed information about the layout and configuration of the fuel delivery system, including the location of the pump, valves, and fuel storage tank. By referring to the as-built drawing, one can identify any potential issues or malfunctions in the system and proceed with further troubleshooting accordingly.

24. (807) What component aids in opening the 302AF fueling and defueling valve?

VPI

Hytrol

Ejector

Ejector-strainer

The ejector-strainer is the component that aids in opening the 302AF fueling and defueling valve. It is responsible for creating a vacuum that helps to open the valve and allow fuel or defuel fluid to flow through. Additionally, the ejector-strainer also filters out any debris or contaminants in the fluid to ensure a clean and efficient fueling or defueling process.

Explanation

The ejector-strainer is the component that aids in opening the 302AF fueling and defueling valve. It is responsible for creating a vacuum that helps to open the valve and allow fuel or defuel fluid to flow through. Additionally, the ejector-strainer also filters out any debris or contaminants in the fluid to ensure a clean and efficient fueling or defueling process.

25. (817) After activating an emergency stop switch at the Type II hydrant outlet, how do you reset the system to refuel?

Place the magnet on the refuel KISS switch

Place the cover back on the emergency switch

Manually reset the controls in the lateral control pit

Manually reset the controls in the pump-house control room

To refuel after activating an emergency stop switch at the Type II hydrant outlet, the system needs to be manually reset. This can be done by resetting the controls in the pump-house control room. This indicates that there are specific controls in the control room that need to be manually adjusted or reset in order to resume the refueling process. Placing a magnet on the refuel KISS switch or placing the cover back on the emergency switch are not mentioned as steps for resetting the system in this scenario.

Explanation

To refuel after activating an emergency stop switch at the Type II hydrant outlet, the system needs to be manually reset. This can be done by resetting the controls in the pump-house control room. This indicates that there are specific controls in the control room that need to be manually adjusted or reset in order to resume the refueling process. Placing a magnet on the refuel KISS switch or placing the cover back on the emergency switch are not mentioned as steps for resetting the system in this scenario.

26. The fueling pump and motor in the Type III system must be aligned to within

0.2 inch

0.02 inch

0.002 inch

0.0002 inch

The fueling pump and motor in the Type III system must be aligned to within 0.002 inch. This level of precision is necessary to ensure that the pump and motor are properly aligned and can function efficiently. Any misalignment beyond this tolerance could result in decreased performance and potential damage to the system. Therefore, it is crucial to align the pump and motor within this specified range to maintain the optimal functioning of the Type III system.

Explanation

The fueling pump and motor in the Type III system must be aligned to within 0.002 inch. This level of precision is necessary to ensure that the pump and motor are properly aligned and can function efficiently. Any misalignment beyond this tolerance could result in decreased performance and potential damage to the system. Therefore, it is crucial to align the pump and motor within this specified range to maintain the optimal functioning of the Type III system.

27. (824) What opens the 362AF-8 hydrant control valve for refueling of an aircraft?

The CRA

The CV flow control

The hydraulic deadman

The pneumatic deadman

The pneumatic deadman opens the 362AF-8 hydrant control valve for refueling of an aircraft. The term "pneumatic" refers to the use of compressed air or gas to control the valve. The deadman feature ensures that the valve remains open only as long as the operator maintains pressure on the control mechanism. This safety measure prevents accidental or unauthorized fuel flow, as the valve automatically closes if the operator releases pressure.

Explanation

The pneumatic deadman opens the 362AF-8 hydrant control valve for refueling of an aircraft. The term "pneumatic" refers to the use of compressed air or gas to control the valve. The deadman feature ensures that the valve remains open only as long as the operator maintains pressure on the control mechanism. This safety measure prevents accidental or unauthorized fuel flow, as the valve automatically closes if the operator releases pressure.

28. (801) What type of electrical units and wiring is used in nonhazardous locations, such as pressurized control rooms?

Explosion-proof, enclosed type

General-purpose, enclosed type

Explosion-proof, non-enclosed type

General-purpose, non-enclosed type

In nonhazardous locations, such as pressurized control rooms, general-purpose, enclosed type electrical units and wiring are used. This means that the electrical units and wiring are designed to be used in a variety of applications and are enclosed to protect them from external elements and potential damage. This type of wiring is suitable for nonhazardous environments where there is no risk of explosions or other hazardous conditions.

Explanation

In nonhazardous locations, such as pressurized control rooms, general-purpose, enclosed type electrical units and wiring are used. This means that the electrical units and wiring are designed to be used in a variety of applications and are enclosed to protect them from external elements and potential damage. This type of wiring is suitable for nonhazardous environments where there is no risk of explosions or other hazardous conditions.

29. (804) Which of the following should you check first if a pump motor will not start or hum?

Fuses

Relays

Fuel level

Control panel setup

If a pump motor will not start or hum, the first thing to check is the control panel setup. This is because the control panel setup includes the settings and configurations that determine how the pump motor operates. If the control panel is not properly set up or if there are any issues with the settings, it can prevent the motor from starting or humming. Therefore, checking the control panel setup is the logical first step in troubleshooting the issue.

Explanation

If a pump motor will not start or hum, the first thing to check is the control panel setup. This is because the control panel setup includes the settings and configurations that determine how the pump motor operates. If the control panel is not properly set up or if there are any issues with the settings, it can prevent the motor from starting or humming. Therefore, checking the control panel setup is the logical first step in troubleshooting the issue.

30. (809) Which of these would remedy leakage on the Philadelphia hydrant adapter?

Replace the poppet

Replace the stem guide

Replace the flange gasket

Replace the disc and seat

Replacing the flange gasket would remedy leakage on the Philadelphia hydrant adapter. The flange gasket is a sealing component that prevents leaks between the hydrant adapter and the hydrant. If the gasket is damaged or worn out, it can result in leakage. By replacing the flange gasket, a new and properly functioning gasket will be installed, ensuring a tight seal and preventing any further leakage.

Explanation

Replacing the flange gasket would remedy leakage on the Philadelphia hydrant adapter. The flange gasket is a sealing component that prevents leaks between the hydrant adapter and the hydrant. If the gasket is damaged or worn out, it can result in leakage. By replacing the flange gasket, a new and properly functioning gasket will be installed, ensuring a tight seal and preventing any further leakage.

31. (816) What is the probably cause if the 41AF-10 main valvve opens when refueling and is detected by the defueling pump rotating?

Leakage through normally open solenoid valve

Leakage through normally closed solenoid valve

Leakage through solenoid valve during slow flow

Check valve installed backwards

The probably cause if the 41AF-10 main valve opens when refueling and is detected by the defueling pump rotating is leakage through the normally closed solenoid valve. This means that the solenoid valve, which is supposed to be closed during refueling, is allowing fuel to leak through it, causing the main valve to open. This can lead to fuel loss and potential safety hazards during refueling operations.

Explanation

The probably cause if the 41AF-10 main valve opens when refueling and is detected by the defueling pump rotating is leakage through the normally closed solenoid valve. This means that the solenoid valve, which is supposed to be closed during refueling, is allowing fuel to leak through it, causing the main valve to open. This can lead to fuel loss and potential safety hazards during refueling operations.

32. (819) After adjusting the high-pressure CRL on the 51AF-4 rapid defuel valve, what is the last thing you should do to the CRL before leaving the area?

Tighten jam nut

Tighten adjusting screw

Place cap back on the control and seal

Turn off all solenoid switches in the pit.

After adjusting the high-pressure CRL on the 51AF-4 rapid defuel valve, the last thing you should do to the CRL before leaving the area is to place the cap back on the control and seal it. This ensures that the CRL is protected from any external elements and prevents any accidental adjustments or tampering.

Explanation

After adjusting the high-pressure CRL on the 51AF-4 rapid defuel valve, the last thing you should do to the CRL before leaving the area is to place the cap back on the control and seal it. This ensures that the CRL is protected from any external elements and prevents any accidental adjustments or tampering.

33. (822) A Type III operating storage tank level indicator servo compartment must be listed for use in

Class 1, Division 1, Group C

Class 1, Division 1, Group D

Class 1, Division 2, Group C

Class 1, Division 2, Group D

A Type III operating storage tank level indicator servo compartment must be listed for use in Class 1, Division 1, Group D. This means that the indicator must be designed and certified to operate safely in an environment where flammable gases or vapors may be present continuously or intermittently under normal operating conditions. Group D refers to the specific type of flammable material, which in this case is a flammable gas or vapor.

Explanation

A Type III operating storage tank level indicator servo compartment must be listed for use in Class 1, Division 1, Group D. This means that the indicator must be designed and certified to operate safely in an environment where flammable gases or vapors may be present continuously or intermittently under normal operating conditions. Group D refers to the specific type of flammable material, which in this case is a flammable gas or vapor.

34. (817) The type 352AF hydrant adapter controls the level at which fuel flow stops in defueling in order to

Keep moisture out of the system

Prevent corrosion in the piping system

Keep the fuel pressure from getting too high

Prevent air from entering the installed piping system

The type 352AF hydrant adapter is designed to prevent air from entering the installed piping system during defueling. This is important because air in the fuel system can cause problems such as fuel vapor lock, which can disrupt the flow of fuel and potentially lead to engine failure. By preventing air from entering the system, the hydrant adapter ensures that fuel flow remains uninterrupted and the fuel system operates smoothly.

Explanation

The type 352AF hydrant adapter is designed to prevent air from entering the installed piping system during defueling. This is important because air in the fuel system can cause problems such as fuel vapor lock, which can disrupt the flow of fuel and potentially lead to engine failure. By preventing air from entering the system, the hydrant adapter ensures that fuel flow remains uninterrupted and the fuel system operates smoothly.

35. (817) When the defuel pump shurs off automatically, what opens its electrical control circuit?

Vacuum control switch

Pump circuit breaker

Pump control switch

Air control switch

When the defuel pump shuts off automatically, the electrical control circuit is opened by the vacuum control switch. This switch is responsible for sensing the vacuum pressure and triggering the pump to shut off when the desired level is reached. By opening the electrical control circuit, the vacuum control switch ensures that power is cut off to the pump, preventing it from continuing to operate unnecessarily.

Explanation

When the defuel pump shuts off automatically, the electrical control circuit is opened by the vacuum control switch. This switch is responsible for sensing the vacuum pressure and triggering the pump to shut off when the desired level is reached. By opening the electrical control circuit, the vacuum control switch ensures that power is cut off to the pump, preventing it from continuing to operate unnecessarily.

36. (834) When is the solenoid in the 58AF-3 pressure control valve in the Type IV system de-energized?

When any pump is on in the manual mode

When any pump is on in the refueling mode

When any pump is off

When all pumps are off

The solenoid in the 58AF-3 pressure control valve in the Type IV system is de-energized when all pumps are off. This means that when none of the pumps are running, the solenoid is not receiving any electrical power and is therefore de-energized.

Explanation

The solenoid in the 58AF-3 pressure control valve in the Type IV system is de-energized when all pumps are off. This means that when none of the pumps are running, the solenoid is not receiving any electrical power and is therefore de-energized.

37. (806) How many hydrant outlet are normally installed for each 302AF fueling and defueling valve?

1

2

3

4

For each 302AF fueling and defueling valve, normally only one hydrant outlet is installed.

Explanation

For each 302AF fueling and defueling valve, normally only one hydrant outlet is installed.

38. (822) Normally, which of the following tanks can be used on the Type III system as an opening storage tank when the nearest bulk storage tank is 2 miles from the fueling apron?

10,000 bbl

20,000 bbl

30,000 bbl

40,000 bbl

The 10,000 bbl tank can be used as an opening storage tank on the Type III system because it is the smallest capacity tank listed. Since the nearest bulk storage tank is 2 miles away, it is more practical to have a smaller tank closer to the fueling apron for easier access and convenience. The larger tanks (20,000 bbl, 30,000 bbl, and 40,000 bbl) would be less suitable for this purpose as they would require longer pipelines and potentially more complex infrastructure.

Explanation

The 10,000 bbl tank can be used as an opening storage tank on the Type III system because it is the smallest capacity tank listed. Since the nearest bulk storage tank is 2 miles away, it is more practical to have a smaller tank closer to the fueling apron for easier access and convenience. The larger tanks (20,000 bbl, 30,000 bbl, and 40,000 bbl) would be less suitable for this purpose as they would require longer pipelines and potentially more complex infrastructure.

39. (822) How must the tank outlet valves be positioned to refuel an aircraft in a Type III system?

Both must be open

Both must be closed

One must be fully open and one must be fully closed

One must be partially open and one must be partially closed

To refuel an aircraft in a Type III system, one tank outlet valve must be fully open and the other must be fully closed. This is because in a Type III system, the fuel flows through both valves simultaneously, with one valve allowing fuel to enter the tank and the other valve preventing fuel from leaving the tank. By having one valve fully open, fuel can enter the tank, while having the other valve fully closed ensures that fuel does not flow out of the tank. This allows for safe and efficient refueling of the aircraft.

Explanation

To refuel an aircraft in a Type III system, one tank outlet valve must be fully open and the other must be fully closed. This is because in a Type III system, the fuel flows through both valves simultaneously, with one valve allowing fuel to enter the tank and the other valve preventing fuel from leaving the tank. By having one valve fully open, fuel can enter the tank, while having the other valve fully closed ensures that fuel does not flow out of the tank. This allows for safe and efficient refueling of the aircraft.

40. (822) What size is the product recovery tank?

2,000 gallons

3,000 gallons

4,000 gallons

5,000 gallons

The product recovery tank is 4,000 gallons in size.

Explanation

The product recovery tank is 4,000 gallons in size.

41. (823) Who defines the temperature rating for motors used with the fueling pumps in the type III system?

NFPA 70

MAJCOM fuels engineer

American Petroleum Institute

National Society of Engineers

NFPA 70, also known as the National Electrical Code (NEC), is a standard developed by the National Fire Protection Association (NFPA) that provides guidelines for electrical installations. In this context, NFPA 70 defines the temperature rating for motors used with the fueling pumps in the type III system. It ensures that the motors are designed to operate safely within specific temperature limits, considering the potential hazards associated with fueling pumps and their electrical components. The other options, MAJCOM fuels engineer, American Petroleum Institute, and National Society of Engineers, are not directly responsible for defining temperature ratings for motors in this specific context.

Explanation

NFPA 70, also known as the National Electrical Code (NEC), is a standard developed by the National Fire Protection Association (NFPA) that provides guidelines for electrical installations. In this context, NFPA 70 defines the temperature rating for motors used with the fueling pumps in the type III system. It ensures that the motors are designed to operate safely within specific temperature limits, considering the potential hazards associated with fueling pumps and their electrical components. The other options, MAJCOM fuels engineer, American Petroleum Institute, and National Society of Engineers, are not directly responsible for defining temperature ratings for motors in this specific context.

42. (834) What type swivel joints are installed on a Type IV hoseless pantograph?

Stainless steel, lubricated, welded

Stainless steel, lubricated, flanged

Stainless steel, non-lubricated, welded

Stainless steel, non-lubricated, flanged

The correct answer is stainless steel, non-lubricated, flanged. This type of swivel joint is installed on a Type IV hoseless pantograph. Stainless steel is used for its durability and resistance to corrosion. The swivel joint is non-lubricated to prevent any oil or grease contamination in the system. The flanged design allows for easy installation and maintenance.

Explanation

The correct answer is stainless steel, non-lubricated, flanged. This type of swivel joint is installed on a Type IV hoseless pantograph. Stainless steel is used for its durability and resistance to corrosion. The swivel joint is non-lubricated to prevent any oil or grease contamination in the system. The flanged design allows for easy installation and maintenance.

43. (802) The Pritchard system control room has how many electrical panels? For what are they used?

2; pump control and pump selector

2; pump selector and transformer selector

3; pump control, pump selector, and defuel pumps

3; pump control, transformer selector, and pump selector

The Pritchard system control room has three electrical panels. These panels are used for pump control, pump selector, and defuel pumps.

Explanation

The Pritchard system control room has three electrical panels. These panels are used for pump control, pump selector, and defuel pumps.

44. (811) What type solenoid is used on the 90AF-8 refueling control valve?

Two-port, normally open

Two-port, normally closed

Three-port, normally open

Three-port, normally closed

The correct answer is two-port, normally closed. This means that the solenoid used on the 90AF-8 refueling control valve has two ports and is normally closed, meaning that it blocks the flow of fluid unless it is actively opened by an electrical signal.

Explanation

The correct answer is two-port, normally closed. This means that the solenoid used on the 90AF-8 refueling control valve has two ports and is normally closed, meaning that it blocks the flow of fluid unless it is actively opened by an electrical signal.

45. (821) What type of meter is used in the receiving line of the Type III system?

600gpm positive displacement

1,200gpm positive displacement

600gpm non-positive displacement

1,200gpm non-positive displacement

A positive displacement meter is used in the receiving line of the Type III system with a flow rate of 1,200gpm. This type of meter measures the flow of liquid by trapping a known volume of fluid and then transferring it to the outlet side of the meter. The positive displacement meter is accurate and reliable for measuring high flow rates, making it suitable for the receiving line of the Type III system.

Explanation

A positive displacement meter is used in the receiving line of the Type III system with a flow rate of 1,200gpm. This type of meter measures the flow of liquid by trapping a known volume of fluid and then transferring it to the outlet side of the meter. The positive displacement meter is accurate and reliable for measuring high flow rates, making it suitable for the receiving line of the Type III system.

46. (826) What must be done at the PCP to set up the Type III system for fueling?

Select the lead pump, place the system in manual, and push SYSTEM STOP

Select the lead pump, place the system in manual, and push SYSTEM START

Select the lead pump, place the system in automatic, and push SYSTEM STOP

Select the lead pump, place the system in automatic, and push SYSTEM START

To set up the Type III system for fueling at the PCP, the correct steps are to select the lead pump, place the system in automatic mode, and push the SYSTEM START button. This ensures that the lead pump is chosen as the primary pump, the system is set to automatically control the fueling process, and the fueling process is initiated by pushing the SYSTEM START button.

Explanation

To set up the Type III system for fueling at the PCP, the correct steps are to select the lead pump, place the system in automatic mode, and push the SYSTEM START button. This ensures that the lead pump is chosen as the primary pump, the system is set to automatically control the fueling process, and the fueling process is initiated by pushing the SYSTEM START button.

47. (823) How many solenoids are on the 136AF-9B emergency shutoff valve, and what does the valve do when the solenoid(s) energize?

1, closes

1, free floats

2, closes

2, free floats

The 136AF-9B emergency shutoff valve has two solenoids. When the solenoids energize, the valve free floats.

Explanation

The 136AF-9B emergency shutoff valve has two solenoids. When the solenoids energize, the valve free floats.

48. (828) When refueling and defueling at the same time in a Type III system, where does the fuel being defueled go?

To the product recovery tank

To the other aircraft being refueled

Into an R-11 refuel/defuel truck

Into the return line of the HSV checkout stand

When refueling and defueling at the same time in a Type III system, the fuel being defueled goes to the other aircraft being refueled.

Explanation

When refueling and defueling at the same time in a Type III system, the fuel being defueled goes to the other aircraft being refueled.

49. (808) In order to calculate the differential pressure required to adjust the CDHS-3 properly, you need to know the

Upstream pressure and flow rate

Orifice-plate size and downstream pressure

Upstream pressure and downstream pressure

Gallons-per-minute delivery and orifice-plate bore size

To calculate the differential pressure required to adjust the CDHS-3 properly, you need to know the gallons-per-minute delivery and orifice-plate bore size. This is because the orifice-plate bore size determines the flow rate, and the gallons-per-minute delivery represents the flow rate. The differential pressure is the difference between the upstream and downstream pressures, but in order to calculate it accurately, you need to know the flow rate and orifice-plate bore size.

Explanation

To calculate the differential pressure required to adjust the CDHS-3 properly, you need to know the gallons-per-minute delivery and orifice-plate bore size. This is because the orifice-plate bore size determines the flow rate, and the gallons-per-minute delivery represents the flow rate. The differential pressure is the difference between the upstream and downstream pressures, but in order to calculate it accurately, you need to know the flow rate and orifice-plate bore size.

50. (809) What would happen if the vacuum breaker on a hose coupling failed to open?

Refueling could not be done

Defueling could not be done

Fuel from the hydrant outlet and fueling hose would not drain properly

A constant delivery of pressure to the hydrant outlet could not be maintained

If the vacuum breaker on a hose coupling failed to open, fuel from the hydrant outlet and fueling hose would not drain properly. The vacuum breaker is designed to prevent a vacuum from forming in the fueling system, allowing air to enter and equalize the pressure. If it fails to open, a vacuum could develop, preventing proper drainage of fuel from the outlet and hose. This could lead to fuel stagnation, blockages, and potentially unsafe conditions during refueling operations.

Explanation

If the vacuum breaker on a hose coupling failed to open, fuel from the hydrant outlet and fueling hose would not drain properly. The vacuum breaker is designed to prevent a vacuum from forming in the fueling system, allowing air to enter and equalize the pressure. If it fails to open, a vacuum could develop, preventing proper drainage of fuel from the outlet and hose. This could lead to fuel stagnation, blockages, and potentially unsafe conditions during refueling operations.

51. (809) The magnetic switch at the hydrant in the modified Panero system energizes the

302AF solenoid only

Deep-well pump only

302AF solenoid and defueling pump

302AF solenoid and deep-well turbine pumps

The magnetic switch at the hydrant in the modified Panero system energizes both the 302AF solenoid and the deep-well turbine pumps.

Explanation

The magnetic switch at the hydrant in the modified Panero system energizes both the 302AF solenoid and the deep-well turbine pumps.

52. (811) When the cover-chamber pressure of the 90AF-8 refueling control valve is at least as great as the inlet pressure, the valve

Pulsates

Modulates

Opens fully

Closes tightly

When the cover-chamber pressure of the 90AF-8 refueling control valve is at least as great as the inlet pressure, the valve closes tightly. This means that the valve is fully closed and there is no flow of fluid through it. The equal or higher pressure in the cover-chamber prevents any leakage or opening of the valve, ensuring a tight seal.

Explanation

When the cover-chamber pressure of the 90AF-8 refueling control valve is at least as great as the inlet pressure, the valve closes tightly. This means that the valve is fully closed and there is no flow of fluid through it. The equal or higher pressure in the cover-chamber prevents any leakage or opening of the valve, ensuring a tight seal.

53. (811) At what pressure is the CRD on the 90AF-8 refueling control valve set?

50 psi

55 psi

100 psi

105 psi

The CRD on the 90AF-8 refueling control valve is set at 100 psi.

Explanation

The CRD on the 90AF-8 refueling control valve is set at 100 psi.

54. (822) The fuel transfer pump on the product recovery tank in a Type III system automatically energizes when the tank is

65 percent full

70 percent full

75 percent full

80 percent full

The correct answer is 70 percent full. In a Type III system, the fuel transfer pump on the product recovery tank automatically energizes when the tank reaches 70 percent full. This is done to ensure that the fuel is transferred to the main tank efficiently and prevent overflow or spillage.

Explanation

The correct answer is 70 percent full. In a Type III system, the fuel transfer pump on the product recovery tank automatically energizes when the tank reaches 70 percent full. This is done to ensure that the fuel is transferred to the main tank efficiently and prevent overflow or spillage.

55. (825) What will be the first symbol in a rung of ladder logic?

Output

Timer

Contacts

Counter

The first symbol in a rung of ladder logic is typically the contacts. Contacts represent input conditions or states that need to be satisfied in order for the ladder logic rung to be executed. These contacts can be normally open (NO) or normally closed (NC) and are used to control the flow of current in the ladder logic circuit.

Explanation

The first symbol in a rung of ladder logic is typically the contacts. Contacts represent input conditions or states that need to be satisfied in order for the ladder logic rung to be executed. These contacts can be normally open (NO) or normally closed (NC) and are used to control the flow of current in the ladder logic circuit.

56. (829) How much fuel must be pumped to flush the hydrant loop of a Type III system that contains 42,000 gallons?

42,000 gallons

84,000 gallons

126,000 gallons

168,000 gallons

To flush the hydrant loop of a Type III system, the amount of fuel that must be pumped is equal to the amount of fuel in the system. In this case, the system contains 42,000 gallons of fuel, so 42,000 gallons must be pumped to flush the loop. Therefore, the correct answer is 42,000 gallons.

Explanation

To flush the hydrant loop of a Type III system, the amount of fuel that must be pumped is equal to the amount of fuel in the system. In this case, the system contains 42,000 gallons of fuel, so 42,000 gallons must be pumped to flush the loop. Therefore, the correct answer is 42,000 gallons.

57. (835) What condition would cause a resonating horn to sound in a Type IV system?

Emergency stop

Engine generator fault

Product recovery tank leak

High-level oil/water separator

In a Type IV system, a resonating horn is designed to sound in the event of an emergency stop. This means that if the emergency stop button or switch is activated, the resonating horn will produce a loud sound, alerting people nearby to the emergency situation. This is an important safety feature as it helps to quickly and effectively communicate the need for immediate action or evacuation in case of an emergency.

Explanation

In a Type IV system, a resonating horn is designed to sound in the event of an emergency stop. This means that if the emergency stop button or switch is activated, the resonating horn will produce a loud sound, alerting people nearby to the emergency situation. This is an important safety feature as it helps to quickly and effectively communicate the need for immediate action or evacuation in case of an emergency.

58. (807) During refueling, which 302AF fueling and defueling valve component is responsible for closing the defuel side of the main valve?

Loading CRL

CDHS-3

Solenoid

Hytrol

The solenoid is responsible for closing the defuel side of the main valve during refueling.

Explanation

The solenoid is responsible for closing the defuel side of the main valve during refueling.

59. (810) What lateral control pit component cuts off the defuel pump when the hydrant outlet closes?

Solenoid control switch

Pump circuit breaker

Vacuum control switch

Panel selector switch

The vacuum control switch is the correct answer because it cuts off the defuel pump when the hydrant outlet closes. This switch is responsible for controlling the flow of fuel and is designed to activate or deactivate the pump based on the vacuum pressure in the system. When the hydrant outlet closes, the vacuum control switch detects the change in pressure and cuts off the defuel pump to prevent any further fuel flow.

Explanation

The vacuum control switch is the correct answer because it cuts off the defuel pump when the hydrant outlet closes. This switch is responsible for controlling the flow of fuel and is designed to activate or deactivate the pump based on the vacuum pressure in the system. When the hydrant outlet closes, the vacuum control switch detects the change in pressure and cuts off the defuel pump to prevent any further fuel flow.

60. (820) What type of piping is used on the receiving line of a Type III system if the pipe is 8 inches in diameter?

Carbon steel, Schedule 40S

Carbon steel, Schedule 80S

Stainless steel, Schedule 20S

Stainless steel, Schedule 10S

The correct answer is carbon steel, Schedule 40S. This type of piping is commonly used in Type III systems with an 8-inch diameter. Schedule 40S refers to the thickness and strength of the pipe, with S indicating a standard wall thickness. Carbon steel is a durable and commonly used material for piping systems due to its strength and resistance to corrosion.

Explanation

The correct answer is carbon steel, Schedule 40S. This type of piping is commonly used in Type III systems with an 8-inch diameter. Schedule 40S refers to the thickness and strength of the pipe, with S indicating a standard wall thickness. Carbon steel is a durable and commonly used material for piping systems due to its strength and resistance to corrosion.

61. (827) What actions occur if the issue venturi senses 600gpm and the return venturi senses 40gpm or less for 10 seconds?

The lead pump shuts down

Only the lead pump continues to run

The lead pump continues to run and the second pump is called on

The lead pump shuts down and the second pump is called on

If the issue venturi senses 600gpm and the return venturi senses 40gpm or less for 10 seconds, the lead pump will continue to run and the second pump will be called on. This means that both pumps will be operational, with the lead pump remaining active and the second pump being activated to assist in maintaining the required flow rate. This action is taken to ensure that there is sufficient water flow and pressure in the system.

Explanation

If the issue venturi senses 600gpm and the return venturi senses 40gpm or less for 10 seconds, the lead pump will continue to run and the second pump will be called on. This means that both pumps will be operational, with the lead pump remaining active and the second pump being activated to assist in maintaining the required flow rate. This action is taken to ensure that there is sufficient water flow and pressure in the system.

62. (815) The components of the 134AF defueling control valve include a valve position indicator,

Flow clean strainer, ejector, and solenoid

Ejector, solenoid, and pressure relief valve

Orifice strainer, solenoid, and pressure relief valve

Ejector-strainer, solenoid, and pressure differential control

The correct answer is "flow clean strainer, ejector, and solenoid". The components listed in this answer are the specific parts that make up the 134AF defueling control valve. The flow clean strainer is responsible for filtering out any debris or contaminants in the fuel, ensuring that it is clean before it enters the valve. The ejector is used to create a vacuum that allows the fuel to be drawn out of the tank. The solenoid is an electromechanical device that controls the flow of fuel through the valve. Together, these components work together to control the defueling process.

Explanation

The correct answer is "flow clean strainer, ejector, and solenoid". The components listed in this answer are the specific parts that make up the 134AF defueling control valve. The flow clean strainer is responsible for filtering out any debris or contaminants in the fuel, ensuring that it is clean before it enters the valve. The ejector is used to create a vacuum that allows the fuel to be drawn out of the tank. The solenoid is an electromechanical device that controls the flow of fuel through the valve. Together, these components work together to control the defueling process.

63. (821) At what differential pressure must the receiving strainer in the Type III system be cleaned?

3 psi

10 psi

15 psi

20 psi

The receiving strainer in the Type III system must be cleaned at a differential pressure of 10 psi. This means that when the pressure difference between the upstream and downstream sides of the strainer reaches 10 psi, it is necessary to clean the strainer to maintain proper flow and prevent clogging.

Explanation

The receiving strainer in the Type III system must be cleaned at a differential pressure of 10 psi. This means that when the pressure difference between the upstream and downstream sides of the strainer reaches 10 psi, it is necessary to clean the strainer to maintain proper flow and prevent clogging.

64. (822) What actions occur when the low-level alarm on a Type III operating storage tank is activated?

A horn sounds and a light illuminates in the pump house

A horn sounds and a light illuminates on the alarm window

A horn sounds , a light illuminates on the alarm window, and all transfer pumps are shut down

A horn sounds , a light illuminates on the alarm window, and all fueling pumps are shut down

When the low-level alarm on a Type III operating storage tank is activated, a horn will sound and a light will illuminate on the alarm window. Additionally, all fueling pumps will be shut down.

Explanation

When the low-level alarm on a Type III operating storage tank is activated, a horn will sound and a light will illuminate on the alarm window. Additionally, all fueling pumps will be shut down.

65. (823) What size piping is used for the suction header in the Type III system?

6 inch

8 inch

12 inch

16 inch

The suction header in the Type III system requires a larger size piping to accommodate the flow of fluids. A 16-inch piping size is necessary to ensure sufficient suction capacity and prevent any restrictions or blockages in the system. This larger size allows for a greater volume of fluid to be transported, which is important for the efficient operation of the system.

Explanation

The suction header in the Type III system requires a larger size piping to accommodate the flow of fluids. A 16-inch piping size is necessary to ensure sufficient suction capacity and prevent any restrictions or blockages in the system. This larger size allows for a greater volume of fluid to be transported, which is important for the efficient operation of the system.

66. (824) At what pressure does the 58AF-9 back-pressure control valve open to control the hydrant loop pressure?

80psi at the nearest hydrant outlet

80psi at the farthest hydrant outlet

100psi a the nearest hydrant outlet

100psi at the farthest hydrant outlet

The correct answer is 100psi at the farthest hydrant outlet. This means that the 58AF-9 back-pressure control valve will open to control the hydrant loop pressure when the pressure at the farthest hydrant outlet reaches 100psi. This valve is designed to maintain a consistent pressure in the hydrant loop, and it will open to release excess pressure when it exceeds the set limit. Therefore, in this case, the valve will open when the pressure at the farthest hydrant outlet reaches 100psi to prevent any further increase in pressure.

Explanation

The correct answer is 100psi at the farthest hydrant outlet. This means that the 58AF-9 back-pressure control valve will open to control the hydrant loop pressure when the pressure at the farthest hydrant outlet reaches 100psi. This valve is designed to maintain a consistent pressure in the hydrant loop, and it will open to release excess pressure when it exceeds the set limit. Therefore, in this case, the valve will open when the pressure at the farthest hydrant outlet reaches 100psi to prevent any further increase in pressure.

67. (834) What type of refueling hose is installed on a Type IV hose-end pantograph?

3 inch, API 1529, hardwall

4 inch, API 1581, hardwall

3 inch, API 1529, semi-hardwall

4 inch, API 1529, semi-hardwall

The correct answer is 3 inch, API 1529, semi-hardwall. This type of refueling hose is installed on a Type IV hose-end pantograph.

Explanation

The correct answer is 3 inch, API 1529, semi-hardwall. This type of refueling hose is installed on a Type IV hose-end pantograph.

68. (807) What part on the 302AF fueling and defueling valve restricts the flow of fuel in the control tubing and under normal conditions will not close?

Ejector-strainer

CV flow control

Pressure relief control (CRL)

Pressure reducing control (CRD)

The pressure reducing control (CRD) is the part on the 302AF fueling and defueling valve that restricts the flow of fuel in the control tubing. It is designed to reduce the pressure of the fuel to a specific level. Under normal conditions, the CRD will not close, meaning it will not completely stop the flow of fuel. Instead, it will regulate the pressure to ensure it remains at the desired level.

Explanation

The pressure reducing control (CRD) is the part on the 302AF fueling and defueling valve that restricts the flow of fuel in the control tubing. It is designed to reduce the pressure of the fuel to a specific level. Under normal conditions, the CRD will not close, meaning it will not completely stop the flow of fuel. Instead, it will regulate the pressure to ensure it remains at the desired level.

69. (815) How often is the 134AF defueling control valve operationally inspected?

Monthly

Quarterly

Semiannually

Annually

The 134AF defueling control valve is operationally inspected semiannually. This means that the valve is checked for any issues or malfunctions every six months. Regular inspections are important to ensure that the valve is functioning properly and to identify any potential problems early on. Semiannual inspections help to maintain the valve's performance and prevent any disruptions or failures in the defueling process.

Explanation

The 134AF defueling control valve is operationally inspected semiannually. This means that the valve is checked for any issues or malfunctions every six months. Regular inspections are important to ensure that the valve is functioning properly and to identify any potential problems early on. Semiannual inspections help to maintain the valve's performance and prevent any disruptions or failures in the defueling process.

70. (821) Which of the these is not a function of the 40-27G filter/separator control valve?

Check valve

Flow control

Pressure reducer

Differential pressure shutoff

The 40-27G filter/separator control valve performs various functions, including check valve, flow control, and differential pressure shutoff. However, it does not function as a pressure reducer.

Explanation

The 40-27G filter/separator control valve performs various functions, including check valve, flow control, and differential pressure shutoff. However, it does not function as a pressure reducer.

71. (821) Once the 40-27G filter/separator control valve has closed due to high differential pressure, what must be done to get a valve to operate again?

Reset the control panel

Clean the receiving strainer

Manually reset the 40-28G

Manually reset the CDHS-3A

To get the valve to operate again after it has closed due to high differential pressure, the CDHS-3A must be manually reset.

Explanation

To get the valve to operate again after it has closed due to high differential pressure, the CDHS-3A must be manually reset.

72. (823) What prevents leakage due to a complete seal failure on the Type III fueling pump mechanical seal?

O-ring

Teflon packing

The end-plate seal gland

A non-sparking throttle bushing

A non-sparking throttle bushing prevents leakage due to a complete seal failure on the Type III fueling pump mechanical seal. This type of bushing is designed to be non-sparking, which means it does not generate sparks or heat when in contact with other materials. By using a non-sparking throttle bushing, the risk of ignition or explosion in the event of a seal failure is minimized, ensuring the safety and preventing leakage of the fuel.

Explanation

A non-sparking throttle bushing prevents leakage due to a complete seal failure on the Type III fueling pump mechanical seal. This type of bushing is designed to be non-sparking, which means it does not generate sparks or heat when in contact with other materials. By using a non-sparking throttle bushing, the risk of ignition or explosion in the event of a seal failure is minimized, ensuring the safety and preventing leakage of the fuel.

73. (823) What is the purpose of the flow switch in the Type III system?

To call on the lead pump

To lock on the lead pump

To call on the secondary pump

To lock on the secondary pump

The purpose of the flow switch in the Type III system is to lock on the lead pump. This means that when the flow switch detects a sufficient flow of water, it will activate and keep the lead pump running. This ensures that the lead pump continues to operate and provide water flow, even if there are fluctuations or changes in the system. By locking on the lead pump, the flow switch helps maintain a consistent water supply and prevents any interruptions in the system.

Explanation

The purpose of the flow switch in the Type III system is to lock on the lead pump. This means that when the flow switch detects a sufficient flow of water, it will activate and keep the lead pump running. This ensures that the lead pump continues to operate and provide water flow, even if there are fluctuations or changes in the system. By locking on the lead pump, the flow switch helps maintain a consistent water supply and prevents any interruptions in the system.

74. (823) In the Type III system, what milliampere signal is sent by the issue DPT when there is 1,200gpm flowing through the issue venturi?

4mA

8mA

12mA

20mA

In a Type III system, the milliampere signal sent by the issue DPT (Differential Pressure Transmitter) is proportional to the flow rate. In this case, with 1,200gpm flowing through the issue venturi, the correct milliampere signal is 12mA. This signal indicates the specific flow rate and is used for monitoring and control purposes in the system.

Explanation

In a Type III system, the milliampere signal sent by the issue DPT (Differential Pressure Transmitter) is proportional to the flow rate. In this case, with 1,200gpm flowing through the issue venturi, the correct milliampere signal is 12mA. This signal indicates the specific flow rate and is used for monitoring and control purposes in the system.

75. (825) What is the term for the three-step process of checking inputs, executing the program, and updating outputs in the PLC?

Execute

Scan

Programming

Processing

The term for the three-step process of checking inputs, executing the program, and updating outputs in the PLC is "Scan". During the scan process, the PLC continuously checks the status of inputs, executes the program logic based on the inputs, and updates the outputs accordingly. This cycle repeats in a continuous loop to ensure that the PLC is constantly monitoring and controlling the system it is connected to.

Explanation

The term for the three-step process of checking inputs, executing the program, and updating outputs in the PLC is "Scan". During the scan process, the PLC continuously checks the status of inputs, executes the program logic based on the inputs, and updates the outputs accordingly. This cycle repeats in a continuous loop to ensure that the PLC is constantly monitoring and controlling the system it is connected to.

76. (818) what changes have to be made to the 352AF hydrant adapter and level control valve to permit rapid defueling?

Remove the float, install an angle valve, and replace the cover with a rubber dust cover

Install an angle valve, replace the cover with an aluminum blanking cap, and remove the float.

Replace the cover with a rubber dust cover, install a manual bypass valve, and replace the float with a poppet.

Install a manual bypass valve, replace the poppet, and install an aluminum dust cover

To allow for rapid defueling, several changes need to be made to the 352AF hydrant adapter and level control valve. First, an angle valve should be installed to control the flow of fuel. Second, the cover should be replaced with an aluminum blanking cap to seal the valve. Finally, the float should be removed to prevent any obstruction in the fuel flow. This combination of changes will enable the adapter and valve to facilitate quick and efficient defueling operations.

Explanation

To allow for rapid defueling, several changes need to be made to the 352AF hydrant adapter and level control valve. First, an angle valve should be installed to control the flow of fuel. Second, the cover should be replaced with an aluminum blanking cap to seal the valve. Finally, the float should be removed to prevent any obstruction in the fuel flow. This combination of changes will enable the adapter and valve to facilitate quick and efficient defueling operations.

77. (824) Which item is not found on the HSV checkout stand?

363AF-8

364AF-2

Fuel pump on/off switch

Emergency shuttoff switch

The fuel pump on/off switch is not found on the HSV checkout stand.

Explanation

The fuel pump on/off switch is not found on the HSV checkout stand.

78. (822) How can the closing feature of the 413AF-5A high-level shutoff valve be tested without filling the tank with fuel up to the high-level shutoff point?

By pushing the test button on the PCP

By pushing the test button in the pump house

Manual tester on the high-level shutoff valve

Manual tester on the high-level shutoff float assembly

The correct answer is "Manual tester on the high-level shutoff float assembly." This is because the high-level shutoff float assembly is responsible for detecting the fuel level and triggering the closing feature of the valve when the fuel reaches the high-level shutoff point. By using a manual tester on the float assembly, the closing feature of the valve can be tested without actually filling the tank with fuel up to the high-level shutoff point.

Explanation

The correct answer is "Manual tester on the high-level shutoff float assembly." This is because the high-level shutoff float assembly is responsible for detecting the fuel level and triggering the closing feature of the valve when the fuel reaches the high-level shutoff point. By using a manual tester on the float assembly, the closing feature of the valve can be tested without actually filling the tank with fuel up to the high-level shutoff point.

79. (824) After refueling an aircraft and the lead pump de-energizes, at what pressure does the 58AF-9-1 defuel/flush valve close?

70psi

75psi

80psi

85psi

After refueling an aircraft, the lead pump de-energizes and the 58AF-9-1 defuel/flush valve closes at a pressure of 80psi.

Explanation

After refueling an aircraft, the lead pump de-energizes and the 58AF-9-1 defuel/flush valve closes at a pressure of 80psi.

80. (817) When does the defuel pump shut off automatically?

When the 352AF bypass opens

When the 352AF bypass closes

When the 352AF float assembly opens

When the 352AF float assembly closes

The defuel pump shuts off automatically when the 352AF float assembly closes. This means that when the float assembly reaches a certain level, it triggers the pump to stop pumping fuel.

Explanation

The defuel pump shuts off automatically when the 352AF float assembly closes. This means that when the float assembly reaches a certain level, it triggers the pump to stop pumping fuel.

81. (819) Which component has failed if the 51AF-4 rapid defuel valve opens during a refueling operation?

Solenoid failed to energize

Hytrol check valve stuck off its seat

CV flow control

Low-pressure CRL

If the 51AF-4 rapid defuel valve opens during a refueling operation, it suggests that the hytrol check valve is stuck off its seat. The hytrol check valve is responsible for preventing fuel from flowing back into the refueling system. If it is stuck off its seat, it means that it is not closing properly and allowing fuel to flow in the wrong direction, causing the rapid defuel valve to open.

Explanation

If the 51AF-4 rapid defuel valve opens during a refueling operation, it suggests that the hytrol check valve is stuck off its seat. The hytrol check valve is responsible for preventing fuel from flowing back into the refueling system. If it is stuck off its seat, it means that it is not closing properly and allowing fuel to flow in the wrong direction, causing the rapid defuel valve to open.

82. (833) To what psi differential is the pressure differential control on the Type IV emergency shutoff valve adjusted?

5psi

7psi

10psi

12psi

The pressure differential control on the Type IV emergency shutoff valve is adjusted to 7psi. This means that the valve will close when there is a pressure difference of 7psi between the two sides of the valve.

Explanation

The pressure differential control on the Type IV emergency shutoff valve is adjusted to 7psi. This means that the valve will close when there is a pressure difference of 7psi between the two sides of the valve.

83. (820) What type of piping is used in the hydrant loop of a Type III system if the pipe is 12 inches in diameter?

Carbon steel, Schedule 80S

Carbon steel, Schedule 40S

Stainless steel, Schedule 20S

Stainless steel, Schedule 10S

Stainless steel, Schedule 20S is the correct answer because Schedule 20S is a standard pipe thickness for stainless steel pipes with a 12-inch diameter. This type of piping is commonly used in hydrant loops of Type III systems due to its corrosion resistance and durability. The Schedule 20S thickness ensures that the pipe can withstand the pressure and flow requirements of the system.

Explanation

Stainless steel, Schedule 20S is the correct answer because Schedule 20S is a standard pipe thickness for stainless steel pipes with a 12-inch diameter. This type of piping is commonly used in hydrant loops of Type III systems due to its corrosion resistance and durability. The Schedule 20S thickness ensures that the pipe can withstand the pressure and flow requirements of the system.

84. (834) What is the flow rate range of the high-ranged differential pressure transmitters on the Type IV return venturi>

0-600gpm

0-800gpm

0-1,000gpm

0-1,200gpm

The correct answer is 0-800gpm. This means that the flow rate range of the high-ranged differential pressure transmitters on the Type IV return venturi is from 0 gallons per minute (gpm) to 800 gpm. This range indicates the maximum and minimum flow rates that the transmitters can accurately measure and transmit.

Explanation

The correct answer is 0-800gpm. This means that the flow rate range of the high-ranged differential pressure transmitters on the Type IV return venturi is from 0 gallons per minute (gpm) to 800 gpm. This range indicates the maximum and minimum flow rates that the transmitters can accurately measure and transmit.

85. (813) How many auxiliary components does the 50AF-2 pressure relief valve have in its control system?

1

2

3

4

The 50AF-2 pressure relief valve has 2 auxiliary components in its control system.

Explanation

The 50AF-2 pressure relief valve has 2 auxiliary components in its control system.

86. (822) What happens when the high-level alarm is activated on a Type III operating storage tank?

The high-level alarm window on the PCP flashes, and a vibrating horn sounds

The high-level alarm window on the PCP illuminates, and a vibrating horn sounds

The high-level alarm window on the PCP flashes, and a resounding horn sounds

The high-level alarm window on the PCP illuminates, and a resounding horn sounds

When the high-level alarm is activated on a Type III operating storage tank, the high-level alarm window on the PCP flashes, indicating the alarm status. Additionally, a vibrating horn sounds to alert operators or personnel of the high-level alarm condition.

Explanation

When the high-level alarm is activated on a Type III operating storage tank, the high-level alarm window on the PCP flashes, indicating the alarm status. Additionally, a vibrating horn sounds to alert operators or personnel of the high-level alarm condition.

87. (823) What is the range of the low-range DPT's piped into the return venturi in the Type III system?

0-40gpm

0-100gpm

0-700gpm

0-800gpm

The range of the low-range DPT's piped into the return venturi in the Type III system is 0-100gpm.

Explanation

The range of the low-range DPT's piped into the return venturi in the Type III system is 0-100gpm.

88. (827) What actions occur if the issue venturi senses 1,800 gpm and the return venturi senses 100gpm for 15 seconds?

The third pump is called off

The fourth pump is called on

The lead, second, and third pumps continue to run

The lead, second, third, and fourth pumps continue to run

If the issue venturi senses 1,800 gpm and the return venturi senses 100 gpm for 15 seconds, the lead, second, and third pumps will continue to run. This implies that the system is functioning properly and there is no need to call off or call on any additional pumps. The flow rate detected by the issue venturi is significantly higher than the flow rate detected by the return venturi, indicating that there is no issue with the system and all the pumps currently running are sufficient to meet the demand.

Explanation

If the issue venturi senses 1,800 gpm and the return venturi senses 100 gpm for 15 seconds, the lead, second, and third pumps will continue to run. This implies that the system is functioning properly and there is no need to call off or call on any additional pumps. The flow rate detected by the issue venturi is significantly higher than the flow rate detected by the return venturi, indicating that there is no issue with the system and all the pumps currently running are sufficient to meet the demand.

89. (812) How often is the 90AF-8 refueling control valve operationally inspected?

Monthly

Quarterly

Semiannually

Annually

The 90AF-8 refueling control valve is operationally inspected on a quarterly basis. This means that the valve is checked for any malfunctions or issues every three months. Regular inspections help ensure that the valve is functioning properly and can be relied upon for refueling operations. Quarterly inspections strike a balance between frequent checks and efficient use of resources.

Explanation

The 90AF-8 refueling control valve is operationally inspected on a quarterly basis. This means that the valve is checked for any malfunctions or issues every three months. Regular inspections help ensure that the valve is functioning properly and can be relied upon for refueling operations. Quarterly inspections strike a balance between frequent checks and efficient use of resources.

90. (812) Before you set the CRL on the 90AF-8 refueling control valve, what pressure must you establish?

2 to 3 psi above normal downstream pressure

2 to 3 psi above normal upstream pressure

5 psi above normal downstream pressure

5 psi above normal upstream pressure

Before setting the CRL on the 90AF-8 refueling control valve, a pressure of 5 psi above normal downstream pressure must be established.

Explanation

Before setting the CRL on the 90AF-8 refueling control valve, a pressure of 5 psi above normal downstream pressure must be established.

91. (822) What valve is used as an overfill valve for the product recovery tank in the Type III system?

129AF

2029AF

2129AF

136AF-9B

The valve used as an overfill valve for the product recovery tank in the Type III system is the 2129AF.

Explanation

The valve used as an overfill valve for the product recovery tank in the Type III system is the 2129AF.

92. (831) What automatic valve is used as the receiving filter/separator control valve in a Type IV system?

41AF-2E

41AF-2C

40-27G

40-28A

The correct answer is 40-27G. This automatic valve is used as the receiving filter/separator control valve in a Type IV system.

Explanation

The correct answer is 40-27G. This automatic valve is used as the receiving filter/separator control valve in a Type IV system.

93. (810) How many automatic valves are found in the lateral control pit of the Pritchard system?

1

2

3

4

In the lateral control pit of the Pritchard system, there are four automatic valves.

Explanation

In the lateral control pit of the Pritchard system, there are four automatic valves.

94. (818) when a magnet is placed on the defuel KISS switch, the solenoid of the 51AF04 rapid defuel valve is energized open along with the

Defuel pump

Solenoid on the refuel valve

Solenoid on the defuel valve

Solenoid on the 41AF valve

When a magnet is placed on the defuel KISS switch, the solenoid of the 51AF04 rapid defuel valve is energized open. This means that the solenoid receives an electric current and allows the valve to open, allowing fuel to flow through. The defuel pump is connected to the rapid defuel valve, so when the valve opens, it allows the defuel pump to pump fuel out of the system. Therefore, the correct answer is the defuel pump.

Explanation

When a magnet is placed on the defuel KISS switch, the solenoid of the 51AF04 rapid defuel valve is energized open. This means that the solenoid receives an electric current and allows the valve to open, allowing fuel to flow through. The defuel pump is connected to the rapid defuel valve, so when the valve opens, it allows the defuel pump to pump fuel out of the system. Therefore, the correct answer is the defuel pump.

95. (821) What causes the 40-28G to open and let fuel bypass the receiving separators when receiving fuel into a Type III system from a cross-country pipeline?

Differential pressure of 15psi sensed across the receiving separator

Differential pressure of 15psi sensed across the orifice plate on the receiving separator

Differential pressure of 10psi sensed across the receiving separator

Differential pressure of 10psi sensed across the orifice plate on the receiving separator

When receiving fuel into a Type III system from a cross-country pipeline, the 40-28G opens and lets fuel bypass the receiving separators when there is a differential pressure of 15psi sensed across the receiving separator. This means that the pressure on one side of the separator is 15psi higher than the pressure on the other side. This pressure difference causes the 40-28G to open, allowing fuel to bypass the separators.

Explanation

When receiving fuel into a Type III system from a cross-country pipeline, the 40-28G opens and lets fuel bypass the receiving separators when there is a differential pressure of 15psi sensed across the receiving separator. This means that the pressure on one side of the separator is 15psi higher than the pressure on the other side. This pressure difference causes the 40-28G to open, allowing fuel to bypass the separators.

96. (822) What type of pump is used as the fuel transfer pump on the product recovery tank in the Type III system?

A 50gpm API 610 pump

A 100gpm API 610 pump

A 50gpm deep-well turbine pump

A 100gpm deep-well turbine pump

The correct answer is a 50gpm deep-well turbine pump. This type of pump is used as the fuel transfer pump on the product recovery tank in the Type III system. It is specifically designed for transferring fluids from deep wells and is capable of pumping at a rate of 50 gallons per minute.

Explanation

The correct answer is a 50gpm deep-well turbine pump. This type of pump is used as the fuel transfer pump on the product recovery tank in the Type III system. It is specifically designed for transferring fluids from deep wells and is capable of pumping at a rate of 50 gallons per minute.

97. (824) At what pressure does the Brooks valve relieve excess nozzle pressure, and what dictates the Brooks valve set point?

50psi, setting the air sense on the HSV at 50

50psi, setting the air sense on the HSV at 60

55psi, setting the air sense on the HSV at 55

55psi, setting the air sense on the HSV at 65

The correct answer is 55psi, setting the air sense on the HSV at 65. This means that the Brooks valve will relieve excess nozzle pressure when the pressure reaches 55psi. The set point for the Brooks valve is determined by setting the air sense on the HSV at 65psi.

Explanation

The correct answer is 55psi, setting the air sense on the HSV at 65. This means that the Brooks valve will relieve excess nozzle pressure when the pressure reaches 55psi. The set point for the Brooks valve is determined by setting the air sense on the HSV at 65psi.

98. (824) At what pressure does the 58AF-3 pressure control valve close to trap loop pressure?

60psi

65psi

70psi

75psi

The 58AF-3 pressure control valve closes to trap loop pressure at 75psi. This means that when the pressure in the loop reaches 75psi, the valve will shut off to prevent any further increase in pressure. This is important for maintaining the desired pressure level and preventing any potential damage or malfunction in the system.

Explanation

The 58AF-3 pressure control valve closes to trap loop pressure at 75psi. This means that when the pressure in the loop reaches 75psi, the valve will shut off to prevent any further increase in pressure. This is important for maintaining the desired pressure level and preventing any potential damage or malfunction in the system.

99. (808) When yo adjust the unloading CRL on the 302AF fueling and defueling valve, at what pressure do you set the CRL?

5 psi above NOP

10 psi above NOP

5 psi above NIP

10 psi above NIP

When adjusting the unloading CRL on the 302AF fueling and defueling valve, the CRL is set at 5 psi above NOP.

Explanation

When adjusting the unloading CRL on the 302AF fueling and defueling valve, the CRL is set at 5 psi above NOP.

100. (827) What actions occur if the issue venturi senses 2,400gpm and the return venturi senses 1,000gpm for 15 seconds?

The fourth pump is called on

The fourth pump is called off

The lead, second, third, and fourth pumps are called off

The lead, second, third, and fourth pumps continue to run

If the issue venturi senses 2,400gpm and the return venturi senses 1,000gpm for 15 seconds, the fourth pump is called off. This means that the fourth pump, which was previously running, is now stopped or turned off. The reason for calling off the fourth pump could be that the flow rate detected by the venturis indicates that the system does not require the additional pumping capacity provided by the fourth pump.

Explanation

If the issue venturi senses 2,400gpm and the return venturi senses 1,000gpm for 15 seconds, the fourth pump is called off. This means that the fourth pump, which was previously running, is now stopped or turned off. The reason for calling off the fourth pump could be that the flow rate detected by the venturis indicates that the system does not require the additional pumping capacity provided by the fourth pump.

101. (837) During an aircraft refueling in a Type IV system, where does flow increase as flow demand decreases through the 362AF-7 refueling control valve?

Through the issue venturi

Through the return venturi

Through the 41AF-2C valve

Through the 136AF-9B valve

In a Type IV system, the flow increases through the return venturi as flow demand decreases through the 362AF-7 refueling control valve. This means that when less fuel is being demanded, more fuel is flowing through the return venturi.

Explanation

In a Type IV system, the flow increases through the return venturi as flow demand decreases through the 362AF-7 refueling control valve. This means that when less fuel is being demanded, more fuel is flowing through the return venturi.

102. (830) What type of piping is used on the receiving line of a type IV system if the pipe is 2 inches in diameter?

Epoxy-coated carbon steel, Schedule 40S

Epoxy-coated carbon steel, Schedule 80S

Seamless stainless steel, Schedule 10S

Seamless stainless steel, Schedule 20S

The correct answer is epoxy-coated carbon steel, Schedule 80S. This type of piping is used on the receiving line of a type IV system when the pipe has a 2-inch diameter. Schedule 80S refers to the thickness of the pipe wall, which is important for ensuring the pipe can withstand the pressure and stress of the system. Epoxy coating is used to protect the carbon steel from corrosion and extend the lifespan of the pipe.

Explanation

The correct answer is epoxy-coated carbon steel, Schedule 80S. This type of piping is used on the receiving line of a type IV system when the pipe has a 2-inch diameter. Schedule 80S refers to the thickness of the pipe wall, which is important for ensuring the pipe can withstand the pressure and stress of the system. Epoxy coating is used to protect the carbon steel from corrosion and extend the lifespan of the pipe.

103. (818) What are the settings for both pressure reliefs on the 51AF-4 rapid defuel valve?

LOW = 5 psi, and HIGH = 5 psi above the CR: on the 90AF-8

LOW = 5 psi, and HIGH = 5 psi above the CRL on the 50AF-2

LOW = 10 psi, and HIGH = 5 psi above the CRL on the 90AF-8

LOW = 10 psi, and HIGH = 5 psi above the CRL on the 50AF-2

The correct answer is LOW = 5 psi, and HIGH = 5 psi above the CR: on the 90AF-8. This means that the low pressure relief setting on the 90AF-8 rapid defuel valve is 5 psi, and the high pressure relief setting is 5 psi above the control range (CR). This setting ensures that the valve will open and relieve pressure when it reaches 5 psi above the CR, preventing any excessive pressure buildup.

Explanation

The correct answer is LOW = 5 psi, and HIGH = 5 psi above the CR: on the 90AF-8. This means that the low pressure relief setting on the 90AF-8 rapid defuel valve is 5 psi, and the high pressure relief setting is 5 psi above the control range (CR). This setting ensures that the valve will open and relieve pressure when it reaches 5 psi above the CR, preventing any excessive pressure buildup.

104. (823) How many DPT's are piped into the return venturi on a 2,400gpm Type III system?

2

3

4

5

In a 2,400gpm Type III system, there are four DPTs (Differential Pressure Transmitters) piped into the return venturi. These DPTs are used to measure the pressure difference across the venturi, which helps in monitoring the flow rate of the system. Having four DPTs allows for more accurate and reliable measurements, ensuring the system operates efficiently and effectively.

Explanation

In a 2,400gpm Type III system, there are four DPTs (Differential Pressure Transmitters) piped into the return venturi. These DPTs are used to measure the pressure difference across the venturi, which helps in monitoring the flow rate of the system. Having four DPTs allows for more accurate and reliable measurements, ensuring the system operates efficiently and effectively.

105. (829) What must be done on the PCP to flush a Type III system?

Turn system switch to "flush" and all available pump switches to "hand"

Turn system switch to "automatic" and all available pump switches to "hand"

Turn system switch to "flush" and all available pump switches to "automatic"

Turn system switch to "automatic" and all available pump switches to "automatic"

To flush a Type III system, the system switch should be turned to "flush" and all available pump switches should be turned to "hand." This means that the system will be manually operated, allowing for a thorough flushing of the system. Turning the system switch to "automatic" and the pump switches to "automatic" would not provide the same level of control and manual operation needed for a proper flush.

Explanation

To flush a Type III system, the system switch should be turned to "flush" and all available pump switches should be turned to "hand." This means that the system will be manually operated, allowing for a thorough flushing of the system. Turning the system switch to "automatic" and the pump switches to "automatic" would not provide the same level of control and manual operation needed for a proper flush.

106. (814) What is the standard setting for the 50AF-2 pressure relief valve's CRL?

22-3 psi above NOP of the 90AF-8

2-3 psi above NIP of the 90AF-8

10 psi above NOP of the 90AF-8

10 psi above NIP of the 90AF-8

The correct answer is 10 psi above NIP of the 90AF-8. This means that the standard setting for the 50AF-2 pressure relief valve's CRL is 10 psi higher than the Normal Operating Pressure (NIP) of the 90AF-8. This setting ensures that the pressure relief valve will activate when the pressure exceeds the NIP by 10 psi, preventing any potential damage or failure in the system.

Explanation

The correct answer is 10 psi above NIP of the 90AF-8. This means that the standard setting for the 50AF-2 pressure relief valve's CRL is 10 psi higher than the Normal Operating Pressure (NIP) of the 90AF-8. This setting ensures that the pressure relief valve will activate when the pressure exceeds the NIP by 10 psi, preventing any potential damage or failure in the system.

107. (832) What is the purpose of the limit switch on the Type IV product recovery tank high-level shutoff valve?

To provide tank leak detection

To provide a constant liquid-level reading

To signal the microprocessor when the main valve is open

To signal the microprocessor when the main valve is closed

The purpose of the limit switch on the Type IV product recovery tank high-level shutoff valve is to signal the microprocessor when the main valve is closed. This allows the microprocessor to be aware of the status of the main valve and take appropriate actions based on that information.

Explanation

The purpose of the limit switch on the Type IV product recovery tank high-level shutoff valve is to signal the microprocessor when the main valve is closed. This allows the microprocessor to be aware of the status of the main valve and take appropriate actions based on that information.

108. (823) What is the rating for the issue venturi, and where is it located within the Type III system?

1,200gpm, upstream of the emergency shutoff valve

2,400gpm, upstream of the emergency shutoff valve

1,200gpm, downstream of the emergency shutoff valve

2,400gpm, downstream of the emergency shutoff valve

The correct answer is 2,400gpm, downstream of the emergency shutoff valve. This means that the rating for the issue venturi in the Type III system is 2,400 gallons per minute and it is located downstream of the emergency shutoff valve.

Explanation

The correct answer is 2,400gpm, downstream of the emergency shutoff valve. This means that the rating for the issue venturi in the Type III system is 2,400 gallons per minute and it is located downstream of the emergency shutoff valve.

109. (823) What is the rating of the return venturi, and where is it located with the Type III system?

600gpm, upstream of the back-pressure control valve

800gpm, upstream of the back-pressure control valve

600gpm, downstream of the back-pressure control valve

800gpm, downstream of the back-pressure control valve

The correct answer is 800gpm, upstream of the back-pressure control valve. This means that the rating of the return venturi in the Type III system is 800 gallons per minute (gpm), and it is located before the back-pressure control valve.

Explanation

The correct answer is 800gpm, upstream of the back-pressure control valve. This means that the rating of the return venturi in the Type III system is 800 gallons per minute (gpm), and it is located before the back-pressure control valve.

110. (834) What valve is used as the flush valve in a Type IV system?

58E-47

58F-47

136AF-5B

136AF-9B

The valve used as the flush valve in a Type IV system is the 136AF-5B.

Explanation

The valve used as the flush valve in a Type IV system is the 136AF-5B.

111. (836) What are the pressure-indicating transmitters located in a Type IV system?

On the issue line upstream of the 136AF-9B

On the issue line downstream of the 136AF-9B

On the return line upstream of the 58AF-9-1

On the return line downstream of the 58AF-9-1

The pressure-indicating transmitters in a Type IV system are located on the issue line downstream of the 136AF-9B.

Explanation

The pressure-indicating transmitters in a Type IV system are located on the issue line downstream of the 136AF-9B.

112. (822) How is thermal expansion relieved when the overfill valve on the product recovery tank in the Type III system is closed?

Thermal expansion will open the overfill valve

A CRL bleeds pressure around the overfill valve

A CRD bleeds pressure around the overfill valve

A manual valve must be opened to bleed excess pressure directly into the tank

When the overfill valve on the product recovery tank in the Type III system is closed, thermal expansion is relieved by a CRL (Controlled Rate of Leak) bleeding pressure around the overfill valve. This means that when the temperature of the tank increases and causes the fluid inside to expand, the CRL valve will open slightly to release some of the built-up pressure. This prevents the tank from becoming overpressurized and potentially causing damage or failure.

Explanation

When the overfill valve on the product recovery tank in the Type III system is closed, thermal expansion is relieved by a CRL (Controlled Rate of Leak) bleeding pressure around the overfill valve. This means that when the temperature of the tank increases and causes the fluid inside to expand, the CRL valve will open slightly to release some of the built-up pressure. This prevents the tank from becoming overpressurized and potentially causing damage or failure.

113. (814) How often should the 50AF-2 pressure relief valve be checked to ensure that it is opening and relieving pressure?

Annually

Quarterly

Monthly

Weekly

The 50AF-2 pressure relief valve should be checked annually to ensure that it is opening and relieving pressure. Checking it on a yearly basis allows for regular maintenance and ensures that the valve is functioning properly. This frequency allows for any potential issues to be identified and addressed in a timely manner, preventing any potential damage or safety hazards.

Explanation

The 50AF-2 pressure relief valve should be checked annually to ensure that it is opening and relieving pressure. Checking it on a yearly basis allows for regular maintenance and ensures that the valve is functioning properly. This frequency allows for any potential issues to be identified and addressed in a timely manner, preventing any potential damage or safety hazards.

114. (818) How often is the 41AF-10 operationally inspected?

Monthly

Quarterly

Semiannually

Annually

The 41AF-10 is operationally inspected semiannually. This means that the inspection is conducted twice a year. This regular inspection ensures that the 41AF-10 is functioning properly and meets all operational requirements. Conducting the inspection semiannually allows for timely identification and resolution of any issues or maintenance needs, ensuring the continued efficiency and effectiveness of the 41AF-10.

Explanation

The 41AF-10 is operationally inspected semiannually. This means that the inspection is conducted twice a year. This regular inspection ensures that the 41AF-10 is functioning properly and meets all operational requirements. Conducting the inspection semiannually allows for timely identification and resolution of any issues or maintenance needs, ensuring the continued efficiency and effectiveness of the 41AF-10.

115. (832) What valve is used on a Type IV cut-and-cover tank for high-level shutoff?

129AF-1A

129AF-3F

413AF-5A

413AF-9-1

The correct answer is 129AF-3F. This valve is used on a Type IV cut-and-cover tank for high-level shutoff.

Explanation

The correct answer is 129AF-3F. This valve is used on a Type IV cut-and-cover tank for high-level shutoff.

116. (811) The setting of the pressure relief on the 90AF-8 refueling control valve is

5 psi higher than the NOP of the 90AF-8

5 psi higher than the NIP of the 90AF-8

5 psi higher than the NOP of the 51AF-4

5 psi higher than the NIP of the 51AF-4

The correct answer is "5 psi higher than the NIP of the 90AF-8." This means that the pressure relief on the 90AF-8 refueling control valve is set at a pressure that is 5 psi higher than the Normal Operating Pressure (NOP) of the 90AF-8. The NIP refers to the Normal Inlet Pressure, which is the pressure at which the valve operates normally. By setting the pressure relief 5 psi higher than the NIP, it ensures that the valve will open and relieve excess pressure when the pressure exceeds the normal operating range.

Explanation

The correct answer is "5 psi higher than the NIP of the 90AF-8." This means that the pressure relief on the 90AF-8 refueling control valve is set at a pressure that is 5 psi higher than the Normal Operating Pressure (NOP) of the 90AF-8. The NIP refers to the Normal Inlet Pressure, which is the pressure at which the valve operates normally. By setting the pressure relief 5 psi higher than the NIP, it ensures that the valve will open and relieve excess pressure when the pressure exceeds the normal operating range.

117. (826) What actions occur if the issue venturi senses 600gpm and the return venture senses 560gpm or more for 60 seconds?

The 58AF-9 energizes, pressure builds up to 150psi, and the lead pump is called off

The 58AF-9 de-energizes, pressure builds up to 150psi, and the lead pump is called off

The 58AF-9 energizes, pressure builds up to 175psi, and the lead pump is called off

The 58AF-9 de-energizes, pressure builds up to 175psi, and the lead pump is called off

If the issue venturi senses 600gpm and the return venturi senses 560gpm or more for 60 seconds, the 58AF-9 de-energizes. As a result, pressure builds up to 175psi, and the lead pump is called off.

Explanation

If the issue venturi senses 600gpm and the return venturi senses 560gpm or more for 60 seconds, the 58AF-9 de-energizes. As a result, pressure builds up to 175psi, and the lead pump is called off.

118. (836) When refueling in the refueling mode of a Type IV system, what is the condition of solenoid A on the 58AF-9-1 defuel/flush valve?

Energized, closed

Energized, enabled

De-energized, closed

De-energized, enabled

In the refueling mode of a Type IV system, solenoid A on the 58AF-9-1 defuel/flush valve is energized and enabled. This means that the solenoid is powered and activated, allowing fuel to flow through the valve. The valve remains closed to prevent any fuel from escaping during the refueling process.

Explanation

In the refueling mode of a Type IV system, solenoid A on the 58AF-9-1 defuel/flush valve is energized and enabled. This means that the solenoid is powered and activated, allowing fuel to flow through the valve. The valve remains closed to prevent any fuel from escaping during the refueling process.

119. (834) What position is the solenoid B of the 58AF-9-1 defuel/flush valve in during pantograph flushing, and what does it cause the main valve to do?

Energized, open

Energized, close

De-energized, open

De-energized, close

During pantograph flushing, the solenoid B of the 58AF-9-1 defuel/flush valve is energized and in the open position. This causes the main valve to also open.

Explanation

During pantograph flushing, the solenoid B of the 58AF-9-1 defuel/flush valve is energized and in the open position. This causes the main valve to also open.

120. (839) When a Type IV system is placed in the pantograph flush mode, what happens to the 136AF-5B flush valve?

The solenoid is energized to open the main valve

The solenoid is energized to close the main valve

The solenoid is de-energized to open the main valve

The solenoid is de-energized to close the main valve

When a Type IV system is placed in the pantograph flush mode, the solenoid is energized to close the main valve.

Explanation

When a Type IV system is placed in the pantograph flush mode, the solenoid is energized to close the main valve.

121. (834) When a Type IV system is placed in the pantograph flush mode, what happens to the flush valve?

The solenoid is energized and the main valve opens

The solenoid is energized and the main valve closes

The solenoid is de-energized and the main valve opens

The solenoid is de-energized and the main valve closes

When a Type IV system is placed in the pantograph flush mode, the solenoid is energized. This means that an electric current is applied to the solenoid, causing it to become magnetic. As a result, the solenoid pulls a plunger or valve mechanism towards it, which in turn closes the main valve. Therefore, when the solenoid is energized, the main valve closes.

Explanation

When a Type IV system is placed in the pantograph flush mode, the solenoid is energized. This means that an electric current is applied to the solenoid, causing it to become magnetic. As a result, the solenoid pulls a plunger or valve mechanism towards it, which in turn closes the main valve. Therefore, when the solenoid is energized, the main valve closes.

122. (838) When a Type IV system is placed in the loop flush mode, what happens to the 136AF-5B flush valve?

The solenoid is energized to open the main valve

The solenoid is energized to close the main valve

The solenoid is de-energized to close the main valve

The solenoid is de-energized to open the main valve

When a Type IV system is placed in the loop flush mode, the solenoid is de-energized to open the main valve. This means that the electrical current to the solenoid is cut off, causing the solenoid to release its magnetic hold on the valve. As a result, the main valve opens, allowing the flow of water or fluid through the system.

Explanation

When a Type IV system is placed in the loop flush mode, the solenoid is de-energized to open the main valve. This means that the electrical current to the solenoid is cut off, causing the solenoid to release its magnetic hold on the valve. As a result, the main valve opens, allowing the flow of water or fluid through the system.

Liquid Fuels Systems-cdc3e452 (Vol.5)