3e451 Volume 2 Fuel Tank, Tank Entry And Operation And Maintenance Of Mechanical System Components

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(205) You must clean an operating tank that is not internally coated and does not have a receiving filter separator every
- 4 years
- 6 years
- 8 years
- 10 years

About This Quiz

This quiz assesses knowledge on fuel tank management, including specifications by the Defense Energy Support Center, tank construction requirements, and operational safety. It is crucial for roles involving fuel systems in the Air Force, enhancing operational efficiency and safety compliance.

Quiz Preview

2.

(231) Emergency-stop switches are what color?
- Red
- Amber
- Orange
- Yellow
Correct Answer

A. Red

Explanation

Emergency-stop switches are typically colored red because red is universally recognized as a signal for danger or stop. This color is chosen to ensure that the switch stands out and can be easily identified in emergency situations. Red is a highly visible color that can quickly alert individuals to the location of the emergency-stop switch, allowing them to quickly and effectively stop machinery or equipment in case of an emergency.

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3.

(201) What does the Defense Energy Support Center (DESC) determine the type, size, and number of fuel tanks needed at each base are?
- Air Force standard design
- The mission requirements
- MAJCOM recommendations
- Available construction dollars
Correct Answer

A. The mission requirements

Explanation

The Defense Energy Support Center (DESC) determines the type, size, and number of fuel tanks needed at each base based on the mission requirements. This means that the fuel tanks are chosen and designed based on the specific needs and objectives of the base's operations. The DESC takes into consideration factors such as the types of aircraft and vehicles that need fuel, the expected fuel consumption, and any specific operational considerations. By considering the mission requirements, the DESC ensures that each base has the appropriate fuel storage capacity to support its operations effectively.

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4.

(201) All new tanks must have what kind of containment?
- Plastic liner
- Leak detection
- Concrete bottom
- Double-wall construction or dyke
Correct Answer

A. Double-wall construction or dyke

Explanation

Double-wall construction or dyke is the correct answer because it provides an additional layer of protection against leaks or spills. A double-wall construction consists of two walls, with the inner wall holding the tank contents and the outer wall acting as a secondary containment system. This design helps to prevent the escape of hazardous materials in case of a leak or rupture in the inner wall. A dyke, on the other hand, is a barrier or embankment built around the tank to contain any potential spills. Both options ensure that any leaks or spills are contained, minimizing the risk of environmental damage or harm to human health.

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5.

(205) How often do you clean a Mogas or diesel tank?
- 4 years
- 6 years
- 8 years
- By direction of the fuels management office
Correct Answer

A. By direction of the fuels management office

Explanation

The frequency of cleaning a Mogas or diesel tank is determined by the fuels management office. They provide directions on when the tank should be cleaned, which can vary depending on factors such as usage, environmental conditions, and maintenance requirements.

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6.

(201) What will horizontal underground storage tanks and cut and cover tanks that issue jet fuel have on top of them?
- A pumphouse
- A concrete cover
- An open air shed
- Nothing, to prevent collapse of the tank
Correct Answer

A. A pumphouse

Explanation

Horizontal underground storage tanks and cut and cover tanks that issue jet fuel will have a pumphouse on top of them. A pumphouse is necessary to house the pumps and equipment needed to transfer the jet fuel in and out of the tanks. It provides a controlled and secure environment for the operation of the pumps, ensuring the safe and efficient management of the fuel storage and distribution system.

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7.

(201) What should you use when replacing a manway cover?
- New nuts and bolts
- The old gasket if it is in good condition
- A new gasket slightly thicker than the old one
- A new gasket the same thickness as the old one
Correct Answer

A. A new gasket the same thickness as the old one

Explanation

When replacing a manway cover, it is recommended to use a new gasket that is the same thickness as the old one. This ensures a proper seal and prevents any leaks or damage. Using a gasket of a different thickness may not provide the same level of sealing and could result in the cover not fitting properly. Therefore, it is important to use a new gasket that matches the thickness of the old one to maintain the integrity of the manway cover.

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8.

(203) The roof guide is installed on floating roof tanks to
- Keep the roof from rotating
- Prevent the collapse of the tank shell
- Provide a vapor recovery area under the roof
- Provide a path to the ground for static electricity
Correct Answer

A. Keep the roof from rotating

Explanation

The roof guide is installed on floating roof tanks to keep the roof from rotating. This is important because the roof of a floating roof tank floats on the liquid stored inside, and without proper guidance, it could rotate and cause damage to the tank or its components. The roof guide acts as a stabilizing mechanism, ensuring that the roof remains in a fixed position and does not rotate. This helps maintain the structural integrity of the tank and prevents any potential accidents or failures.

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9.

(208) What would you use to check the liquidometer accuracy?
- Tape and bob
- Liquid level float
- Liquid level gauge
- Weighted gauge tester
Correct Answer

A. Tape and bob

Explanation

To check the accuracy of a liquidometer, one would use a tape and bob. A tape and bob is a measuring tool that consists of a tape measure and a weighted bob attached to the end. The bob is lowered into the liquid to measure the depth or level accurately. This method allows for precise measurement and ensures the liquidometer's accuracy.

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10.

(223) Who should do the repairs when an A. O. Smith meter requires major maintenance?
- Manufacturer
- Refueling maintenance shop
- Liquid fuels maintenance shop
- Department of weights and measurement
Correct Answer

A. Manufacturer

Explanation

When an A. O. Smith meter requires major maintenance, the repairs should be done by the manufacturer. This is because the manufacturer is the one who has the expertise and knowledge about the specific design and workings of the meter. They would have the necessary tools, parts, and technical skills to carry out the repairs effectively and ensure that the meter is functioning correctly. The manufacturer would also have access to any necessary software updates or technical support that may be required during the maintenance process. Therefore, it is best to rely on the manufacturer for major repairs of an A. O. Smith meter.

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11.

(205) How many bands are used to identify JP-8 fuel?
- One
- Two
- Three
- Four
Correct Answer

A. Three

Explanation

JP-8 fuel is identified using three bands.

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12.

(202) What type of vent is located on a floating pan?
- Slot
- Open
- Bleeder
- Overflow
Correct Answer

A. Bleeder

Explanation

A bleeder vent is located on a floating pan. This type of vent allows excess pressure to escape from the pan, preventing any potential damage or malfunction. It helps to regulate the pressure inside the pan and maintain a safe operating environment.

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13.

(206) When manually gauging a tank, why must you keep the tape in contact with the gauge pipe?
- To keep the tape from twisting
- To easily read the tape increments
- To prevent the discharge of a spark
- To steady the tape when lowering the bob
Correct Answer

A. To prevent the discharge of a spark

Explanation

Keeping the tape in contact with the gauge pipe helps to prevent the discharge of a spark. This is important because tanks often contain flammable or combustible materials. If a spark were to occur during the gauging process, it could potentially ignite the contents of the tank and cause a fire or explosion. Therefore, maintaining contact between the tape and the gauge pipe reduces the risk of sparking and helps to ensure safety during the gauging process.

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14.

(214) How do you reset the lower explosive limit (LEL) sensor on the MultiRAE PGM–50?
- Press the "reset" button
- Sample fresh air for 60 seconds then press the "Y/+" button
- Turn the unit off then back on
- PMEL must replace the sensor
Correct Answer

A. Sample fresh air for 60 seconds then press the "Y/+" button

Explanation

To reset the lower explosive limit (LEL) sensor on the MultiRAE PGM-50, you need to sample fresh air for 60 seconds and then press the "Y/+" button. This process allows the sensor to recalibrate and ensure accurate readings. Pressing the "reset" button or turning the unit off and back on will not reset the LEL sensor. If the sensor is not functioning properly, it must be replaced by PMEL.

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15.

(201) Damage to a tank can occur if the
- Vent or vent piping becomes clogged
- Tank has an anti-rotation device
- Low-level shutoff fails to work
- High level alarm fails to work
Correct Answer

A. Vent or vent piping becomes clogged

Explanation

If the vent or vent piping becomes clogged, it can lead to damage to the tank. The vent is responsible for allowing air to enter and exit the tank as the liquid level changes. If the vent becomes blocked, pressure can build up inside the tank, potentially causing damage or even an explosion. Therefore, it is important to ensure that the vent and vent piping are clear and free from any obstructions to prevent any potential damage to the tank.

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16.

(212) During tank cleaning, how often must you record a vapor reading?
- Every 10 minutes
- Every 15 minutes
- At the beginning of the tank cleaning
- At the beginning and end of the tank cleaning
Correct Answer

A. Every 15 minutes

Explanation

During tank cleaning, it is necessary to record a vapor reading every 15 minutes. This is important to ensure that the tank is being properly cleaned and that any potentially hazardous vapors are being monitored. Regular vapor readings help to ensure the safety of the cleaning process and can alert the crew to any potential issues or hazards that may arise during the cleaning operation.

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17.

(216) Electrical controls in hazardous area smust be proofed (protected) against
- Dust
- Vapor
- Weather
- Explosion
Correct Answer

A. Explosion

Explanation

Electrical controls in hazardous areas must be protected against explosion. This is because hazardous areas are prone to the presence of flammable substances, such as gases or vapors, which can ignite and cause an explosion if they come into contact with an electrical spark or heat source. Therefore, it is crucial to have explosion-proof electrical controls in these areas to prevent any potential ignition sources from causing a catastrophic explosion.

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18.

(222) What is the most probable cause for a meter to over-register?
- Air in the line
- Dirt in the line
- Excessive flow
- Excessive pressure
Correct Answer

A. Air in the line

Explanation

Air in the line is the most probable cause for a meter to over-register. When there is air in the line, it can cause the meter to inaccurately measure the flow of the substance being measured. This is because the air can create turbulence or bubbles that interfere with the proper functioning of the meter, leading to an overestimation of the quantity being measured.

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19.

(211) A safety harness, used in tank cleaning, is good for a maximum of how many years from the date stamped on the harness?
- 5
- 10
- 15
- 20
Correct Answer

A. 10

Explanation

A safety harness used in tank cleaning is good for a maximum of 10 years from the date stamped on the harness. This means that after 10 years, the harness may no longer be safe or reliable to use. Regular inspection and replacement of the harness is necessary to ensure the safety of the user.

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20.

(235) For safe dispersal of fuel vapors, a storage tank vent pipe must extend how high?
- 10 feet
- 11 feet
- 12 feet
- 13 feet
Correct Answer

A. 12 feet

Explanation

To ensure safe dispersal of fuel vapors, a storage tank vent pipe must extend at least 12 feet high. This height allows the vapors to disperse effectively and reduces the risk of ignition or explosion. A higher vent pipe also helps to prevent the vapors from accumulating near the ground or any potential ignition sources. Therefore, extending the vent pipe to a height of 12 feet is necessary for the safe operation of the storage tank.

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21.

(202) What type of above ground tank can withstand very little pressure or vacuum during the filling or removal of fuel?
- Vertical
- Cone roof
- Floating roof tank
- Cone roof tank with floating pan
Correct Answer

A. Cone roof

Explanation

A cone roof tank is designed to withstand very little pressure or vacuum during the filling or removal of fuel. The cone-shaped roof provides structural support and helps to distribute any pressure or vacuum evenly, preventing damage to the tank. This type of tank is commonly used for storing flammable liquids and is suitable for environments where there may be minimal pressure or vacuum fluctuations.

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22.

(205) You must clean an operating storage tank that does not have a receiving filter separator but has internal coating every
- 4 years
- 6 years
- 8 years
- 10 years
Correct Answer

A. 6 years

Explanation

The correct answer is 6 years. The internal coating of the operating storage tank needs to be cleaned every 6 years.

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23.

(207) In extremely cold climates, what should you do to the roof drain line?
- Fill it with salt water
- Fill it with antifreeze only
- Fill it with 10 SAE weight oil
- Fill it with a 50/50 mix of antifreeze and water
Correct Answer

A. Fill it with a 50/50 mix of antifreeze and water

Explanation

In extremely cold climates, filling the roof drain line with a 50/50 mix of antifreeze and water is the correct answer. This mixture helps to prevent the water in the drain line from freezing and causing blockages or damage to the roof. Antifreeze lowers the freezing point of the water, ensuring that it remains in a liquid state even in very low temperatures. By using a 50/50 mix, the antifreeze concentration is sufficient to prevent freezing while still allowing for proper drainage. This solution is more effective than filling the drain line with salt water, antifreeze only, or 10 SAE weight oil.

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24.

(213) What must be done to meters in a pit that is to be abandoned?
- Drained only
- Drained and capped off
- Drained, capped off and oiled
- Drained, removed, oiled, and placed in storage
Correct Answer

A. Drained, removed, oiled, and placed in storage

Explanation

To ensure proper abandonment of a pit, the meters must be drained, removed, oiled, and placed in storage. Draining the meters is necessary to remove any remaining fluids. Removing the meters from the pit ensures that they are not left behind and can be properly maintained. Oiling the meters helps to protect them from corrosion while in storage. Finally, placing the meters in storage ensures they are safely stored until needed again.

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25.

(235) How many storage tanks would normally be used at an automotive service station that offers MOGAS, and diesel fuel?
- 1 for each product
- 2 for each product
- 3 for each product
- 4 for each product
Correct Answer

A. 1 for each product

Explanation

Normally, one storage tank would be used for each product (MOGAS and diesel fuel) at an automotive service station. This is because separate storage tanks are needed to store and dispense different types of fuel to ensure proper handling and prevent contamination. Having one storage tank for each product allows for efficient management and distribution of fuel at the service station.

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26.

(202) At what level are the support legs on a cone roof tank with floating pan set at for day-to-day business?
- 1 1/2 feet
- 3 feet
- 4 1/2 feet
- 6 feet
Correct Answer

A. 3 feet

Explanation

The support legs on a cone roof tank with a floating pan are set at a level of 3 feet for day-to-day business. This height provides stability and support for the tank and ensures that it remains in the desired position. It is important to maintain the correct level of support to prevent any accidents or damage to the tank and its contents.

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27.

(203) The double-deck floating roof tank is the most efficient type of roof because the roof
- Slopes to the center
- Support legs are adjustable
- Has insulating air space between the decks
- Water drains easily towards the center
Correct Answer

A. Has insulating air space between the decks

Explanation

The double-deck floating roof tank is the most efficient type of roof because it has insulating air space between the decks. This insulating air space helps to reduce the heat transfer between the stored liquid and the external environment, preventing evaporation and maintaining the temperature of the liquid. This insulation improves the efficiency of the tank by reducing energy loss and minimizing the need for additional heating or cooling.

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28.

(234) What is the minimum speed for a scraper when cleaning a pipeline?
- 1 mph
- 2 mph
- 3 mph
- 4 mph
Correct Answer

A. 2 mph

Explanation

The minimum speed for a scraper when cleaning a pipeline is 2 mph. This speed is necessary to ensure that the scraper effectively removes debris and build-up from the pipeline. A slower speed may not provide enough force to properly clean the pipeline, while a higher speed could potentially damage the pipeline or the scraper itself. Therefore, a speed of 2 mph strikes a balance between effectiveness and safety in pipeline cleaning.

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29.

(209) Who will assign a qualified tank entry supervisor to supervise a tank cleaning operation?
- Shop supervisor
- Section superintendent
- Base safety
- MAJCOM fuels engineer
Correct Answer

A. MAJCOM fuels engineer

Explanation

The MAJCOM fuels engineer will assign a qualified tank entry supervisor to supervise a tank cleaning operation. This is because the MAJCOM fuels engineer is responsible for overseeing fuel operations and safety procedures within the command. As part of their role, they have the authority to ensure that qualified individuals are assigned to supervise specific tasks, such as tank cleaning operations, to maintain safety standards and prevent any potential hazards.

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30.

(212) At what vapor level may workers initially enter a tank for tank cleaning?
- Below 10 percent LEL
- Below 20 percent LEL
- Below 40 percent LEL
- Below 50 percent LEL
Correct Answer

A. Below 10 percent LEL

Explanation

Workers may initially enter a tank for tank cleaning when the vapor level is below 10 percent LEL. This is because the Lower Explosive Limit (LEL) represents the minimum concentration of a flammable substance in the air that can potentially ignite. To ensure safety, workers should enter the tank when the vapor level is below this threshold to minimize the risk of an explosion or fire hazard.

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31.

(217) What will change positions and to what valve will pressure be directed when the float of the pilot valve assembly is in the TOP position?
- Rotary disc, water drain valve
- Rotary disc, fuel discharge valve
- Adapter mounting rod; water drain valve
- Adapter mounting rod, fuel discharge valve
Correct Answer

A. Rotary disc, fuel discharge valve

Explanation

When the float of the pilot valve assembly is in the TOP position, the rotary disc will change positions and the pressure will be directed to the fuel discharge valve.

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32.

(224) Leakage inside the back of a liquid control meter is caused by a faulty
- Viton seal
- Teflon seal
- O-ring
- Square ring
Correct Answer

A. O-ring

Explanation

The correct answer is O-ring. Leakage inside the back of a liquid control meter is often caused by a faulty O-ring. O-rings are used as seals in many applications, including liquid control meters, to prevent leakage. If the O-ring is damaged or worn out, it can no longer effectively seal the meter, leading to leakage.

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33.

(204) About how far above the tank floor is the first stage of the deep-well turbine pump located?
- 3 inches
- 6 inches
- 9 inches
- 12 inches
Correct Answer

A. 6 inches

Explanation

The first stage of the deep-well turbine pump is located about 6 inches above the tank floor.

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34.

(205) You must clean a bulk storage tank that has a receiving filter separator and is internally coated every
- 4 years
- 6 years
- 8 years
- 10 years
Correct Answer

A. 8 years

Explanation

The correct answer is 8 years. This is because the bulk storage tank is internally coated, which helps to protect the tank from corrosion and other damage. However, over time, the coating may deteriorate and become less effective. Therefore, it is recommended to clean the tank every 8 years to remove any buildup or debris that may have accumulated and to ensure that the coating remains intact and functional. Cleaning the tank at regular intervals helps to maintain its integrity and prolong its lifespan.

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35.

(208) How would you take care of internal corrosion for the low-level control attached to the liquidometer?
- Wire brush clean and replace the cover gasket
- Wire brush clean and replace the cover
- Air it out and replace the cover gasket
- Air it out and replace the cover
Correct Answer

A. Wire brush clean and replace the cover gasket

Explanation

To take care of internal corrosion for the low-level control attached to the liquidometer, the correct approach is to wire brush clean the internal components and then replace the cover gasket. This process helps remove any corrosion buildup on the internal parts and ensures a proper seal by replacing the gasket. It is important to clean and maintain the control regularly to prevent corrosion and ensure accurate readings from the liquidometer.

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36.

(223) What maintains a tight seal in the measuring chamber of an A. O. Smith meter?
- Carbon vanes
- Teflon vane inserts
- A coating on the inside wall
- A film of oil on the inside wall
Correct Answer

A. Teflon vane inserts

Explanation

Teflon vane inserts maintain a tight seal in the measuring chamber of an A. O. Smith meter. These inserts are made of Teflon, a non-stick and high-performance material. The Teflon vane inserts create a seal between the moving parts of the meter, preventing any leakage or loss of pressure. This ensures accurate measurement and prevents any outside factors from interfering with the readings.

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37.

(202) At what level does the high-level alarm actuate on a cone roof with a floating pan?
- Just before the high-level shut-off level
- Just after the high-level shut-off level
- Just before the high-high level alarm
- Just after the high-high level alarm
Correct Answer

A. Just before the high-level shut-off level

Explanation

The high-level alarm on a cone roof with a floating pan actuates just before the high-level shut-off level. This means that when the liquid level reaches the point just before the shut-off level, the alarm will be triggered to alert operators or control systems about the approaching high-level condition.

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38.

(222) How is the register of a meter changed to match the actual fuel dispensed through the meter?
- Reset the register head
- Change the gear train ratio
- Replace the register counter
- Remove and clean the register counter
Correct Answer

A. Change the gear train ratio

Explanation

To match the actual fuel dispensed through the meter, the gear train ratio needs to be changed. The gear train ratio determines the relationship between the rotation of the meter and the display on the register. By adjusting the gear train ratio, the register can accurately reflect the amount of fuel dispensed. Resetting the register head, replacing or cleaning the register counter may not address the issue of matching the actual fuel dispensed, as they do not directly affect the gear train ratio.

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39.

(207) At what level must the automatic bleeder vent supports be set when preparing for an internal inspection and cleaning?
- 3 feet
- 4 feet
- 5 feet
- 6 feet
Correct Answer

A. 6 feet

Explanation

The automatic bleeder vent supports must be set at 6 feet when preparing for an internal inspection and cleaning. This height ensures that the vent supports are positioned high enough to allow for proper venting and release of any trapped air or gases during the inspection and cleaning process. Setting the vent supports at this level helps to maintain the safety and efficiency of the system.

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40.

(209) Which one of the following is not the responsibility of the MAJCOM fuels engineer’s representative during the contract cleaning of a fuel tank?
- To inspect the contractors equipment
- To advise the contractors of known potential hazards
- To stop the contractors work for contract violations
- To act as the quality assurance evaluator pertaining to the work
Correct Answer

A. To stop the contractors work for contract violations

Explanation

The MAJCOM fuels engineer's representative is responsible for several tasks during the contract cleaning of a fuel tank. These include inspecting the contractors' equipment, advising them of known potential hazards, and acting as the quality assurance evaluator pertaining to the work. However, it is not their responsibility to stop the contractors' work for contract violations.

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41.

(217) When the float in a vertical filter separator rises to the top position, what happens?
- The water drain valve closes
- The fuel discharge valve closes
- The nonsurge check valve opens
- Nothing, fuel is allowed to flow normally
Correct Answer

A. The fuel discharge valve closes

Explanation

When the float in a vertical filter separator rises to the top position, the fuel discharge valve closes. This is because the float rising indicates that the fuel has reached the desired level in the separator. Closing the fuel discharge valve prevents any further fuel from being discharged and ensures that the fuel remains in the separator for further processing or distribution.

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42.

(207) What prevents fuel from entering a roof drain line?
- Flange gaskets and Teflon® ring packing
- Flange gaskets and asbestos ring packing
- Threaded gaskets and Teflon® ring packing
- Threaded gaskets and asbestos ring packing
Correct Answer

A. Flange gaskets and asbestos ring packing

Explanation

Flange gaskets and asbestos ring packing prevent fuel from entering a roof drain line. These materials create a tight seal between the flange and the drain line, preventing any leakage or seepage of fuel. Asbestos ring packing is known for its durability and resistance to chemical substances, making it an effective barrier against fuel.

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43.

(210) Which of the following fuels normally contains a higher concentration of benzene?
- JP-4
- JP-8
- Diesel
- Gasoline
Correct Answer

A. Gasoline

Explanation

Gasoline normally contains a higher concentration of benzene compared to the other fuels listed. Benzene is a chemical compound that is commonly found in gasoline as an additive. It is used to enhance the octane rating of gasoline and improve engine performance. However, benzene is a known carcinogen and exposure to high levels of benzene can have harmful health effects. Therefore, regulations have been implemented to limit the amount of benzene in gasoline to ensure safety and reduce environmental pollution.

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44.

(213) What must be done to fuel pumps and motors located in a pit if they are to be abandoned?
- Drained only
- Drained and capped off
- Remove, capped off and oiled
- Removed and stored in a dry place
Correct Answer

A. Removed and stored in a dry place

Explanation

To properly abandon fuel pumps and motors located in a pit, they must be removed from the pit and stored in a dry place. This ensures that they are not left in a potentially hazardous or deteriorating environment. Simply draining them or capping them off would not be sufficient for proper abandonment.

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45.

(238) If the meter register on a dispenser does not reset to zero or the numerical wheels do not turn during delivery, the probable cause is a
- Broken shear pin
- Broken gear tooth
- Misaligned drive shaft
- Misaligned variator band
Correct Answer

A. Broken shear pin

Explanation

If the meter register on a dispenser does not reset to zero or the numerical wheels do not turn during delivery, the probable cause is a broken shear pin. A shear pin is designed to break under excessive force or stress, preventing damage to other components. In this case, the broken shear pin would prevent the meter register from resetting to zero or the numerical wheels from turning, indicating a malfunction in the dispenser.

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46.

(202) What size is the water draw off line in an all weather tank, and where does it terminate?
- 1/2 inch, 1/2 inch from the sump bottom
- 1/2 inch, 1 inch from the sump bottom
- 3/4 inch, 1/2 inch from the sump bottom
- 3/4 inch, 1 inch from the sump bottom
Correct Answer

A. 3/4 inch, 1/2 inch from the sump bottom

Explanation

The water draw off line in an all weather tank is 3/4 inch in size. It terminates 1/2 inch from the sump bottom.

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47.

(207) When filling the tank to check the high-high-level alarm, what must be disabled?
- The high-level alarm
- The low-level switch
- The low-level shut-off valve
- The high-level shut-off valve
Correct Answer

A. The high-level shut-off valve

Explanation

When filling the tank to check the high-high-level alarm, the high-level shut-off valve must be disabled. This is because the high-level shut-off valve is responsible for stopping the flow of liquid into the tank when it reaches a certain level. By disabling the high-level shut-off valve, it ensures that the tank can be filled completely without triggering the shut-off mechanism prematurely. This allows for an accurate test of the high-high-level alarm to be conducted.

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48.

(209) How long before entering a fuel tank must you request permission from your MAJCOM?
- 10 days
- 15 days
- 10 workdays
- 15 workdays
Correct Answer

A. 15 workdays

Explanation

Before entering a fuel tank, it is necessary to request permission from the MAJCOM. The correct answer is 15 workdays. This means that the request must be made at least 15 workdays in advance before entering the fuel tank. This allows sufficient time for the MAJCOM to review and approve the request, ensuring proper coordination and safety measures are in place before entering the fuel tank.

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49.

(226) How many hoses does a master meter have and where are they connected?
- 2 hoses; inlet side
- 2 hoses; outlet side
- 3 hoses; 1 on the inlet, 2 on the outlet side
- 3 hoses; 1 on the outlet, 2 on the inlet side
Correct Answer

A. 2 hoses; outlet side

Explanation

A master meter has 2 hoses connected on the outlet side.

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Current Version
Mar 20, 2023

Quiz Edited by
ProProfs Editorial Team
Aug 17, 2013

Quiz Created by
Pggomoljak328

3e451 Volume 2 Fuel Tank, Tank Entry And Operation And Maintenance Of Mechanical System Components

(205) You must clean an operating tank that is not internally coated and does not have a receiving filter separator every

Quiz Preview

(231) Emergency-stop switches are what color?

(201) What does the Defense Energy Support Center (DESC) determine the type, size, and number of fuel tanks needed at each base are?

(201) All new tanks must have what kind of containment?

(205) How often do you clean a Mogas or diesel tank?

(201) What will horizontal underground storage tanks and cut and cover tanks that issue jet fuel have on top of them?

(201) What should you use when replacing a manway cover?

(203) The roof guide is installed on floating roof tanks to

(208) What would you use to check the liquidometer accuracy?

(223) Who should do the repairs when an A. O. Smith meter requires major maintenance?

(205) How many bands are used to identify JP-8 fuel?

(202) What type of vent is located on a floating pan?

(206) When manually gauging a tank, why must you keep the tape in contact with the gauge pipe?

(214) How do you reset the lower explosive limit (LEL) sensor on the MultiRAE PGM–50?

(201) Damage to a tank can occur if the

(212) During tank cleaning, how often must you record a vapor reading?

(216) Electrical controls in hazardous area smust be proofed (protected) against

(222) What is the most probable cause for a meter to over-register?

(211) A safety harness, used in tank cleaning, is good for a maximum of how many years from the date stamped on the harness?

(235) For safe dispersal of fuel vapors, a storage tank vent pipe must extend how high?

(202) What type of above ground tank can withstand very little pressure or vacuum during the filling or removal of fuel?

(205) You must clean an operating storage tank that does not have a receiving filter separator but has internal coating every

(207) In extremely cold climates, what should you do to the roof drain line?

(213) What must be done to meters in a pit that is to be abandoned?

(235) How many storage tanks would normally be used at an automotive service station that offers MOGAS, and diesel fuel?

(202) At what level are the support legs on a cone roof tank with floating pan set at for day-to-day business?

(203) The double-deck floating roof tank is the most efficient type of roof because the roof

(234) What is the minimum speed for a scraper when cleaning a pipeline?

(209) Who will assign a qualified tank entry supervisor to supervise a tank cleaning operation?

(212) At what vapor level may workers initially enter a tank for tank cleaning?

(217) What will change positions and to what valve will pressure be directed when the float of the pilot valve assembly is in the TOP position?

(224) Leakage inside the back of a liquid control meter is caused by a faulty

(204) About how far above the tank floor is the first stage of the deep-well turbine pump located?

(205) You must clean a bulk storage tank that has a receiving filter separator and is internally coated every

(208) How would you take care of internal corrosion for the low-level control attached to the liquidometer?

(223) What maintains a tight seal in the measuring chamber of an A. O. Smith meter?

(202) At what level does the high-level alarm actuate on a cone roof with a floating pan?

(222) How is the register of a meter changed to match the actual fuel dispensed through the meter?

(207) At what level must the automatic bleeder vent supports be set when preparing for an internal inspection and cleaning?

(209) Which one of the following is not the responsibility of the MAJCOM fuels engineer’s representative during the contract cleaning of a fuel tank?

(217) When the float in a vertical filter separator rises to the top position, what happens?

(207) What prevents fuel from entering a roof drain line?

(210) Which of the following fuels normally contains a higher concentration of benzene?

(213) What must be done to fuel pumps and motors located in a pit if they are to be abandoned?

(238) If the meter register on a dispenser does not reset to zero or the numerical wheels do not turn during delivery, the probable cause is a

(202) What size is the water draw off line in an all weather tank, and where does it terminate?

(207) When filling the tank to check the high-high-level alarm, what must be disabled?

(209) How long before entering a fuel tank must you request permission from your MAJCOM?

(226) How many hoses does a master meter have and where are they connected?