Liquid Fuels Systems-cdc3e452 (Vol.5)

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  • 1/122 Questions

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

    • HAND/OFF.
    • HAND/AUTO.
    • HAND/OFF/AUTO
    • HAND/OFF/MANUAL
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About This Quiz


Liquid Fuels Systems Maintenance Journeyman
Volume 5: Operation and Maintenance of Hydrant System Components
CDC 3E452

Liquid Fuels Systems-cdc3e452 (Vol.5) - Quiz

Quiz Preview

  • 2. 

    (803) Emergency stop switches are painted what color?

    • Red

    • Amber

    • Orange

    • Yellow

    Correct Answer
    A. Red
    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.

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  • 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

    Correct Answer
    A. 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.

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  • 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

    Correct Answer
    A. Air in main valve cover chamber
    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.

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  • 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

    Correct Answer
    A. A galvanized grounding rod
    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.

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  • 6. 

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

    • Barges or pipelines

    • Railroad

    • Air Force truck

    • Commercial trucks

    Correct Answer
    A. Barges or pipelines
    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.

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  • 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

    Correct Answer
    A. 20 seconds
    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.

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  • 8. 

    (805) What do most emergency service calls involve?

    • Electrical shorts

    • No delivery of fuel

    • Minor leaks

    • Jammed valves

    Correct Answer
    A. No delivery of fuel
    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.

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  • 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

    Correct Answer
    A. Keep the entire line from draining
    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.

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  • 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

    Correct Answer
    A. CDHS-3 tripping
    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.

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  • 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

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

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  • 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

    Correct Answer
    A. Closed; low-voltage for 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.

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  • 13. 

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

    • Copper

    • Carbon steel

    • Galvanized steel

    • Seamless stainless steel

    Correct Answer
    A. Seamless stainless steel
    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.

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  • 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

    Correct Answer
    A. When fuel is removed to a level below the high-level alarm setting
    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.

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  • 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

    Correct Answer
    A. Zero
    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.

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  • 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

    Correct Answer
    A. When the system is not used in 30 days
    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.

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  • 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

    Correct Answer
    A. Fuel leakage from the vent port
    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.

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  • 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

    Correct Answer
    A. For system safety in case the main valve diaphragm ruptures
    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.

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  • 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

    Correct Answer
    A. CDHS-3
    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.

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  • 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

    Correct Answer
    A. 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.

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  • 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

    Correct Answer
    A. Not required
    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.

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  • 22. 

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

    • 10

    • 25

    • 50

    • 100

    Correct Answer
    A. 25
    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.

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  • 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

    Correct Answer
    A. As-built drawing
    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.

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  • 24. 

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

    • VPI

    • Hytrol

    • Ejector

    • Ejector-strainer

    Correct Answer
    A. Ejector-strainer
    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.

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  • 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

    Correct Answer
    A. Manually reset the controls in the pump-house control room
    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.

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  • 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

    Correct Answer
    A. 0.002 inch
    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.

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  • 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

    Correct Answer
    A. The pneumatic deadman
    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.

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  • 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

    Correct Answer
    A. General-purpose, enclosed type
    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.

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  • 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

    Correct Answer
    A. Control panel setup
    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.

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  • 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

    Correct Answer
    A. Replace the flange gasket
    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.

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  • 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

    Correct Answer
    A. Leakage through normally closed solenoid valve
    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.

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  • 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.

    Correct Answer
    A. Place cap back on the control and seal
    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.

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  • 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

    Correct Answer
    A. Class 1, Division 1, Group D
    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.

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  • 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

    Correct Answer
    A. Prevent air from entering the installed piping system
    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.

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  • 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

    Correct Answer
    A. Vacuum control switch
    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.

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  • 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

    Correct Answer
    A. When all pumps are off
    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.

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  • 37. 

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

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 1
    Explanation
    For each 302AF fueling and defueling valve, normally only one hydrant outlet is installed.

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  • 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

    Correct Answer
    A. 10,000 bbl
    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.

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  • 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

    Correct Answer
    A. One must be fully open and one must be fully closed
    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.

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  • 40. 

    (822) What size is the product recovery tank?

    • 2,000 gallons

    • 3,000 gallons

    • 4,000 gallons

    • 5,000 gallons

    Correct Answer
    A. 4,000 gallons
    Explanation
    The product recovery tank is 4,000 gallons in size.

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  • 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

    Correct Answer
    A. NFPA 70
    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.

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  • 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

    Correct Answer
    A. Stainless steel, non-lubricated, flanged
    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.

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  • 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

    Correct Answer
    A. 3; 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.

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  • 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

    Correct Answer
    A. Two-port, normally closed
    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.

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  • 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

    Correct Answer
    A. 1,200gpm positive displacement
    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.

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  • 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

    Correct Answer
    A. Select the lead pump, place the system in automatic, and push SYSTEM START
    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.

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  • 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

    Correct Answer
    A. 2, free floats
    Explanation
    The 136AF-9B emergency shutoff valve has two solenoids. When the solenoids energize, the valve free floats.

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  • 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

    Correct Answer
    A. 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.

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  • 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

    Correct Answer
    A. Gallons-per-minute delivery 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.

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Quiz Review Timeline (Updated): Dec 4, 2023 +

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  • Current Version
  • Dec 04, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 17, 2010
    Quiz Created by
    JiminyCricket

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