2A652 Age Journeyman Volume 4, Edit Code 6 Quiz

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  • 1/88 Questions

    (603) Repair of ground heater equipment should never be attempted

    • Without first talking with the operator.
    • Without first consulting your supervisor.
    • Unless accurate technical data is available.
    • Unless in the presence of an experienced mechanic.
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About This Quiz

This quiz assesses knowledge on the operation and maintenance of Aerospace Ground Equipment (AGE), specifically focusing on the New Generation Heater (NGH). It covers topics such as temperature control, starting procedures, and sensible heat, crucial for personnel in military aerospace environments.

Aerospace Ground Equipment Quizzes & Trivia

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  • 2. 

    (630) Which must be done prior to raising or lowering the mast from the vertical or horizontal position on the FL–1D floodlight set?

    • Secure all doors.

    • Warm-up the engine.

    • Set the master control switch to ON.

    • Position the tow bar to the left or right.

    Correct Answer
    A. Position the tow bar to the left or right.
    Explanation
    Prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D floodlight set, the tow bar must be positioned to the left or right. This is necessary to ensure that the mast is stable and properly aligned during the raising or lowering process. By positioning the tow bar to the left or right, it provides support and stability to the mast, preventing any potential damage or accidents.

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  • 3. 

    (638) Which type of mechanism does the B–4 adjustable aircraft maintenance platform use to raise and lower the platform?

    • Screw.

    • Scissor.

    • Ratchet.

    • Pneumatic.

    Correct Answer
    A. Scissor.
    Explanation
    The B-4 adjustable aircraft maintenance platform uses a scissor mechanism to raise and lower the platform. This type of mechanism consists of a series of connected bars that pivot, allowing the platform to move up and down in a controlled manner. The scissor mechanism is commonly used in various applications where vertical movement is required, such as lifting platforms and scissors lifts.

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  • 4. 

    (641) When servicing the hydraulic cart, which prevents large particles in the fluid from entering the reservoir?

    • Line filter.

    • Check valve.

    • Mesh screen.

    • Relief valve.

    Correct Answer
    A. Mesh screen.
    Explanation
    A mesh screen is used to prevent large particles in the fluid from entering the reservoir when servicing a hydraulic cart. This screen acts as a filter, allowing only smaller particles and clean fluid to pass through while blocking larger debris. This helps to maintain the cleanliness and integrity of the hydraulic system, preventing damage and ensuring proper functioning of the cart. A line filter, check valve, and relief valve serve different purposes in a hydraulic system and do not specifically prevent large particles from entering the reservoir.

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  • 5. 

    (613) Every how many years is the hydrostatic test due on the receiver tank on a MC–20 air compressor?

    • 9.

    • 7.

    • 5.

    • 3.

    Correct Answer
    A. 5.
    Explanation
    The hydrostatic test is due on the receiver tank of a MC-20 air compressor every 5 years. This means that after every 5 years, the tank needs to undergo a hydrostatic test to check for any leaks or weaknesses. This is important to ensure the safety and efficiency of the air compressor.

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  • 6. 

    (623) Which MJ–1B bomblift valve prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?

    • Air bleed.

    • Rotary by-pass.

    • Counterbalance.

    • Over pressurization.

    Correct Answer
    A. Counterbalance.
    Explanation
    The counterbalance valve prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure. It is designed to provide a back pressure that opposes the weight of the load, ensuring that the arms remain in the lifted position even if there is a loss of hydraulic pressure. This valve helps to maintain the stability and safety of the bomblift system.

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  • 7. 

    (624) During the MJ–1B bomblift operational check, all hydraulic components should exhibit

    • A smooth movement with no binding or no jumping.

    • Fast steady movements with minimal jumping.

    • Some settling once the actuator is released.

    • Small amounts of residue.

    Correct Answer
    A. A smooth movement with no binding or no jumping.
    Explanation
    During the MJ-1B bomblift operational check, it is expected that all hydraulic components should move smoothly without any binding or jumping. This means that there should be no resistance or jerky movements when the components are being operated. The absence of binding or jumping ensures that the hydraulic system is functioning properly and that there are no obstructions or malfunctions that could affect the lift's performance.

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  • 8. 

    (628) The most obvious and easiest way of isolating most hydraulic malfunctions is to look for

    • Slow operation.

    • Erratic operation.

    • Fluid under the unit.

    • Movement when the control valve is not actuated.

    Correct Answer
    A. Fluid under the unit.
    Explanation
    The correct answer is "fluid under the unit." This is because if there is fluid leaking or pooling under the hydraulic unit, it indicates a malfunction or a leak in the system. This can help identify the source of the problem and allow for necessary repairs or maintenance to be performed. Slow operation, erratic operation, and movement when the control valve is not actuated can also be indicators of hydraulic malfunctions, but fluid under the unit is the most obvious and easiest to identify.

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  • 9. 

    (631) Where can you find test procedures for a particular component on a FL–1D floodlight set?

    • Unit manufacturer’s technical order (TO).

    • Periodic inspection workcards.

    • Service inspection workcards.

    • Illustrated parts breakdown.

    Correct Answer
    A. Unit manufacturer’s technical order (TO).
    Explanation
    The correct answer is the unit manufacturer's technical order (TO). This is because the technical order contains detailed instructions and procedures for the maintenance and operation of a specific unit or component. It provides step-by-step guidance on how to perform tests and inspections on the FL-1D floodlight set. The periodic inspection workcards and service inspection workcards may provide some information on testing procedures, but they may not be as comprehensive or specific as the unit manufacturer's technical order. The illustrated parts breakdown is a visual representation of the components and parts of the floodlight set and does not provide instructions for testing procedures.

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  • 10. 

    (637) Which must be done before lowering the ram on the B–6 tripod jack?

    • Tighten the ram lock nut.

    • Loosen the ram lock nut.

    • Close the relief valve.

    • Close the air vent.

    Correct Answer
    A. Loosen the ram lock nut.
    Explanation
    Before lowering the ram on the B-6 tripod jack, it is necessary to loosen the ram lock nut. This is because the ram lock nut secures the ram in place, and loosening it allows for the ram to move freely and be lowered. Tightening the ram lock nut would prevent the ram from being lowered, while closing the relief valve and air vent are unrelated to the action of lowering the ram.

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  • 11. 

    (639) The purpose of the lift mechanism on the MD–1 tow bar is to

    • Adjust the forks.

    • Stabilize the main tube assembly.

    • Raise and lower the wheel assemblies.

    • Engage or disengage the aircraft nose gear.

    Correct Answer
    A. Raise and lower the wheel assemblies.
    Explanation
    The purpose of the lift mechanism on the MD-1 tow bar is to raise and lower the wheel assemblies. This means that the lift mechanism is responsible for lifting the wheels off the ground or lowering them back onto the ground when needed. This is an important function as it allows for easier movement and towing of the aircraft. The lift mechanism ensures that the wheels are properly positioned and can be adjusted as necessary for safe and efficient transportation of the aircraft.

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  • 12. 

    (606) Which MA–3D air conditioner control switch allows the operator to control the overall volume of air leaving the unit?

    • Blower.

    • Airflow.

    • Evaporator.

    • Temperature.

    Correct Answer
    A. Airflow.
    Explanation
    The MA-3D air conditioner control switch that allows the operator to control the overall volume of air leaving the unit is the "Airflow" switch. This switch allows the user to adjust the speed and intensity of the air being blown out by the air conditioner, giving them control over the airflow in the room. The blower switch controls the fan speed, the evaporator switch controls the cooling process, and the temperature switch controls the desired temperature. However, none of these switches specifically control the overall volume of air leaving the unit like the airflow switch does.

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  • 13. 

    (616) At which storage cylinder pressure, in pounds per square inch gauge (psig), should the self generating nitrogen servicing cart (SGNSC) nitrogen booster compressor stop?

    • 2,400.

    • 4,100.

    • 4,400.

    • 6,400.

    Correct Answer
    A. 4,400.
    Explanation
    The self generating nitrogen servicing cart (SGNSC) nitrogen booster compressor should stop at a storage cylinder pressure of 4,400 pounds per square inch gauge (psig).

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  • 14. 

    (609) Which is the compressor displacement when the ACE 802S air conditioner compressor is in the HOLD position?

    • Maximum.

    • Minimum.

    • Constant.

    • Erradic.

    Correct Answer
    A. Constant.
    Explanation
    The compressor displacement refers to the volume of air that the compressor can move in a given time. When the ACE 802S air conditioner compressor is in the HOLD position, it means that the compressor is not actively compressing or moving air. Therefore, the compressor displacement remains constant, as there is no change in the volume of air being moved.

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  • 15. 

    (611) How can a restriction in a refrigerant system be identified?

    • Sweating at the outlet of a component.

    • Frosting at the outlet of a component.

    • Abnormal compressor noise.

    • Increased suction pressure. Please

    Correct Answer
    A. Frosting at the outlet of a component.
    Explanation
    Frosting at the outlet of a component can be an indication of a restriction in a refrigerant system. When there is a restriction, the flow of refrigerant is impeded, causing a drop in pressure and temperature. This drop in temperature can cause moisture in the air to freeze and form frost on the outlet of the component. Therefore, the presence of frosting can help identify a restriction in the system.

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  • 16. 

    (620) Which MJ–2A–1 hydraulic test stand engine system safety device sounds the warning horn in the event of an engine system malfunction?

    • Water level switch.

    • Oil pressure switch.

    • Fuel level indicator.

    • Fuel pressure switch.

    Correct Answer
    A. Oil pressure switch.
    Explanation
    The oil pressure switch is the correct answer because it is a safety device in the MJ-2A-1 hydraulic test stand engine system that sounds the warning horn in the event of an engine system malfunction. When the oil pressure drops below a certain level, the switch activates the horn to alert the operator of the issue. This is important for ensuring the safe operation of the test stand and preventing any potential damage or accidents that may occur due to engine system malfunctions.

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  • 17. 

    (626) Check the MHU–83C/E bomblift backup hydraulic system by

    • Closing the shutoff valve.

    • Operating the hand pump.

    • Closing the air bleed valve.

    • Operating the system pump.

    Correct Answer
    A. Operating the hand pump.
    Explanation
    To check the MHU-83C/E bomblift backup hydraulic system, the correct action is to operate the hand pump. This is because the hand pump is used to manually pressurize the system and ensure that it is functioning properly. Closing the shutoff valve would prevent the flow of hydraulic fluid, closing the air bleed valve would release any trapped air in the system, and operating the system pump would rely on the main hydraulic system instead of the backup system. Therefore, operating the hand pump is the most appropriate action to check the backup hydraulic system.

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  • 18. 

    (628) When troubleshooting the MJ–1B bomblift electrical system, which component will give you a visual indication that the alternator is charging the batteries?

    • Ammeter.

    • Voltmeter.

    • Bright head lights.

    • Control panel light.

    Correct Answer
    A. Ammeter.
    Explanation
    The ammeter is the component that will give a visual indication that the alternator is charging the batteries. An ammeter measures the current flowing through the electrical system, and when the alternator is charging the batteries, it will show a positive current reading on the ammeter. This indicates that the alternator is supplying power to the batteries and charging them. The voltmeter measures the voltage in the system, but it does not directly indicate whether the alternator is charging the batteries. Bright headlights and control panel lights are not directly related to the charging of the batteries.

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  • 19. 

    (629) The engine safety circuits on the FL–1D floodlight set shutdown the engine by

    • Opening the fuel solenoid.

    • Closing the engine intake air.

    • Shutting off fuel to the engine.

    • Tripping the protective circuit breaker.

    Correct Answer
    A. Shutting off fuel to the engine.
    Explanation
    The engine safety circuits on the FL-1D floodlight set shutdown the engine by shutting off fuel to the engine. This means that when the engine safety circuits detect a problem or a dangerous situation, they will stop the flow of fuel to the engine, effectively shutting it down. This is a common safety measure to prevent any further damage or accidents that could occur if the engine continues to run.

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  • 20. 

    (638) Which component on the B–1 adjustable aircraft maintenance platform allows the work platform and steps to remain parallel to the base at any desired platform height?

    • Base assembly.

    • Upper platform.

    • Stair support linkage.

    • Hydraulic cylinder assembly.

    Correct Answer
    A. Stair support linkage.
    Explanation
    The stair support linkage on the B-1 adjustable aircraft maintenance platform allows the work platform and steps to remain parallel to the base at any desired platform height. This component ensures that the platform is stable and level, providing a safe working environment for maintenance personnel. The base assembly provides the foundation for the platform, the upper platform is the work surface, and the hydraulic cylinder assembly allows for height adjustment. However, it is the stair support linkage that specifically controls the parallel alignment of the platform and steps.

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  • 21. 

    (602) When should starting aids be used to start the New Generation Heater (NGH)?

    • When the temperature gauge reads COOL.

    • Never, as it will result in serious engine damage.

    • When ambient temperature is below 32 degrees Fahrenheit (°F).

    • During the engine start up with the ignition switch in PREHEAT position.

    Correct Answer
    A. Never, as it will result in serious engine damage.
    Explanation
    Starting aids should never be used to start the New Generation Heater (NGH) as it will result in serious engine damage. This means that using starting aids such as jump-starting or using additional equipment to start the NGH can cause harm to the engine. It is important to avoid using starting aids to prevent any potential damage to the engine.

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  • 22. 

    (612) Oil in a rotary vane compressor

    • Lubricates the connecting rods.

    • Has high viscosity and is very inflammable.

    • Forms a seal between the vanes and the stator.

    • Permits it to be classified as a high pressure unit.

    Correct Answer
    A. Forms a seal between the vanes and the stator.
    Explanation
    Oil in a rotary vane compressor forms a seal between the vanes and the stator. This is important because it prevents leakage of compressed gases and ensures efficient compression. The oil fills the small gaps between the vanes and the stator, creating a tight seal that allows the compressor to build up pressure effectively. Without this seal, there would be significant loss of compressed gases, leading to reduced performance and efficiency of the compressor.

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  • 23. 

    (631) When a FL–1D floodlight set comes in with a write-up, how do you verify a malfunction exists?

    • Operate the unit.

    • Analyze the problem.

    • Perform a service inspection.

    • Give several probable causes.

    Correct Answer
    A. Operate the unit.
    Explanation
    To verify if a malfunction exists in a FL-1D floodlight set that comes in with a write-up, the best course of action is to operate the unit. By turning on the floodlight set and observing its performance, any malfunction or issue can be identified. This allows for a practical assessment of the unit's functionality and helps in determining the cause of the problem. Analyzing the problem, performing a service inspection, and giving several probable causes can be done after operating the unit to further diagnose and address the malfunction.

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  • 24. 

    (642) The chain hoist on the universal jack tester is operated by

    • Pressure from the jack.

    • Beam assembly.

    • A control box.

    • Load cell.

    Correct Answer
    A. A control box.
    Explanation
    The chain hoist on the universal jack tester is operated by a control box. This means that the control box is responsible for controlling the movement and operation of the chain hoist. The pressure from the jack, beam assembly, and load cell may have other functions or roles in the operation of the universal jack tester, but they are not directly responsible for operating the chain hoist.

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  • 25. 

    (606) Refrigerant leaving the evaporator coil, in the MA–3D air conditioner, is a

    • Low-pressure gas.

    • High-pressure gas.

    • Low-pressure liquid.

    • High-pressure liquid.

    Correct Answer
    A. Low-pressure gas.
    Explanation
    The refrigerant leaving the evaporator coil in the MA-3D air conditioner is in a low-pressure gas state. This is because the evaporator coil is responsible for absorbing heat from the surroundings, causing the refrigerant to evaporate and turn into a gas. As a result, the refrigerant exits the evaporator coil as a low-pressure gas, ready to be compressed and condensed in the next stage of the cooling process.

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  • 26. 

    (623) Continuous movement of pressurized hydraulic fluid in the MJ–1B bomblift causes the fluid to become

    • Cooled.

    • Heated.

    • Compressed.

    • Contaminated.

    Correct Answer
    A. Heated.
    Explanation
    The continuous movement of pressurized hydraulic fluid in the MJ-1B bomblift causes the fluid to become heated. As the fluid is pressurized and flows through the system, it experiences friction and resistance, which generates heat. This heat is transferred to the fluid, causing it to become heated.

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  • 27. 

    (604) Heat that can be felt and added or subtracted to a substance without changing its state is called

    • Super heat.

    • Latent heat.

    • Specific heat.

    • Sensible heat.

    Correct Answer
    A. Sensible heat.
    Explanation
    Sensible heat refers to the heat that can be felt and added or subtracted to a substance without changing its state. This means that the temperature of the substance can be directly measured and sensed. Superheat refers to the heat added to a substance above its boiling point, latent heat refers to the heat absorbed or released during a phase change, and specific heat refers to the amount of heat required to raise the temperature of a substance by a certain amount. Therefore, the correct answer is sensible heat.

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  • 28. 

    (615) How is the air compressor in the self generating nitrogen servicing cart (SGNSC) categorized?

    • High-pressure.

    • Low-pressure.

    • High volume.

    • Low volume.

    Correct Answer
    A. High-pressure.
    Explanation
    The air compressor in the self-generating nitrogen servicing cart (SGNSC) is categorized as high-pressure because it is designed to generate and store nitrogen at high pressures. This is necessary for servicing aircraft systems that require nitrogen at high pressures, such as hydraulic systems and landing gear. The high-pressure air compressor ensures that an adequate supply of nitrogen is available at the required pressure levels for efficient and safe aircraft maintenance.

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  • 29. 

    (628) If a bomblift starter failed to operate, which step should be taken first?

    • Replace the starter.

    • Check the starter cables.

    • Remove and replace the battery.

    • Check the battery terminals and posts.

    Correct Answer
    A. Check the battery terminals and posts.
    Explanation
    If a bomblift starter fails to operate, the first step that should be taken is to check the battery terminals and posts. This is because loose or corroded terminals can prevent the starter from receiving the necessary power to operate. By checking and ensuring that the battery terminals and posts are clean and securely connected, any issues related to power supply can be addressed before considering other potential causes such as a faulty starter or cables.

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  • 30. 

    (634) While operating the split deck maintenance platform you realize the platform will not lower, the most probable cause could be

    • Corroded battery cables.

    • A defective control cable.

    • The main disconnect switch is ON.

    • The engine switch is in RUN position.

    Correct Answer
    A. A defective control cable.
    Explanation
    The most probable cause for the split deck maintenance platform not lowering could be a defective control cable. This is because a defective control cable can prevent the platform from receiving the necessary instructions to lower. Corroded battery cables could also be a potential cause, but it is less likely as it would affect the overall operation of the platform rather than just the lowering function. The main disconnect switch being ON or the engine switch being in the RUN position are unrelated to the issue of the platform not lowering.

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  • 31. 

    (606) When starting the MA–3D air conditioner, hold the safety override switch until

    • 30 pounds of oil pressure is reached on the engine oil pressure gauge.

    • The start switch is released.

    • The engine warms up.

    • The engine starts.

    Correct Answer
    A. 30 pounds of oil pressure is reached on the engine oil pressure gauge.
    Explanation
    When starting the MA-3D air conditioner, it is necessary to hold the safety override switch until 30 pounds of oil pressure is reached on the engine oil pressure gauge. This indicates that the engine has sufficient oil pressure to operate effectively. Once this pressure is reached, it is safe to release the start switch and proceed with starting the engine.

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  • 32. 

    (613) The MC–20 air compressor provides which kind of air for pneumatic tools and tire inflation?

    • High pressure.

    • Low pressure.

    • High volume.

    • Low volume.

    Correct Answer
    A. Low pressure.
    Explanation
    The MC-20 air compressor provides low pressure air for pneumatic tools and tire inflation. This means that it delivers air at a lower pressure, which is suitable for tasks that require less force or power. Low pressure air is commonly used for tasks such as inflating tires, operating pneumatic tools like nail guns or paint sprayers, and other applications where high pressure is not necessary.

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  • 33. 

    (614) Which position should the vent valve be in when liquid oxygen (LOX) carts are being transported?

    • Tow.

    • Closed.

    • Opened.

    • Transport.

    Correct Answer
    A. Closed.
    Explanation
    When liquid oxygen (LOX) carts are being transported, the vent valve should be in the closed position. This is important to prevent any leaks or spills of the highly volatile and potentially dangerous liquid oxygen. Closing the vent valve ensures that the cart is properly sealed and secure during transportation, minimizing the risk of accidents or incidents.

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  • 34. 

    (619) The purpose of the MJ–2A–1 hydraulic test stand fill-and-bleed system is to fill the hydraulic system with fluid and

    • Bleed air from the reservoir during operation.

    • Purge entrapped air before operation.

    • Fill the outlet hoses to the aircraft.

    • Remove contaminants.

    Correct Answer
    A. Purge entrapped air before operation.
    Explanation
    The purpose of the MJ-2A-1 hydraulic test stand fill-and-bleed system is to purge entrapped air before operation. This means that the system is designed to remove any air that may be trapped within the hydraulic system before it is put into operation. This is important because air bubbles can cause issues with the performance and operation of the hydraulic system, so it is necessary to remove them before use.

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  • 35. 

    (619) Which position must the reservoir selector valve be in when filling and bleeding the MJ–2A–1 hydraulic test stand hydraulic system?

    • OPEN.

    • STAND.

    • AIRCRAFT.

    • EXTERNAL.

    Correct Answer
    A. AIRCRAFT.
    Explanation
    The reservoir selector valve must be in the AIRCRAFT position when filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand. This position allows the system to be connected to the aircraft's hydraulic system, enabling the transfer of fluid between the two systems. It ensures that the correct fluid is being used and that any air trapped in the system can be properly bled out.

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  • 36. 

    (620) Which MJ–2A–1 hydraulic test stand switch provides an alternate means of energizing the fill pump when either of the micro switches are defective?

    • Fill switch, LS4.

    • Fill master switch.

    • Fill micro switch, FS1.

    • Fill to start relay switch.

    Correct Answer
    A. Fill switch, LS4.
    Explanation
    The Fill switch, LS4, provides an alternate means of energizing the fill pump when either of the micro switches are defective. This means that if either of the micro switches fail, the Fill switch can still be used to activate the fill pump.

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  • 37. 

    (622) The hydraulic test stand high pressure pump is difficult to repair because of its

    • Precision tolerances.

    • Weight and size.

    • Intricate parts.

    • Age.

    Correct Answer
    A. Precision tolerances.
    Explanation
    The correct answer is precision tolerances. The hydraulic test stand high pressure pump is difficult to repair because it requires precise measurements and alignments. Any slight deviation from the specified tolerances can result in malfunctioning or failure of the pump. Therefore, repairing it requires a high level of expertise and precision to ensure that all parts are properly calibrated and aligned.

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  • 38. 

    (635) Which component provides manual speed adjustment on the AF/M32T–1 cabin leakage tester?

    • Tachometer.

    • Diesel engine.

    • Throttle assembly.

    • Fuel system relief valve.

    Correct Answer
    A. Throttle assembly.
    Explanation
    The throttle assembly is responsible for providing manual speed adjustment on the AF/M32T-1 cabin leakage tester. This component controls the flow of fuel to the engine, allowing the operator to adjust the speed of the tester as needed. The tachometer measures the speed of the engine, but it does not directly provide manual speed adjustment. The diesel engine and fuel system relief valve are not directly involved in the manual speed adjustment process.

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  • 39. 

    (636) If the air intake of the AF/M32T–1 cabin leakage tester was restricted, which effect would it have on operation?

    • High blower output.

    • Low blower output.

    • High cabin pressure.

    • Low flow indicator.

    Correct Answer
    A. Low blower output.
    Explanation
    If the air intake of the AF/M32T-1 cabin leakage tester is restricted, it would result in low blower output. This means that the tester would not be able to generate sufficient airflow, which could affect its ability to accurately measure cabin leakage.

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  • 40. 

    (604) Heat added to a gas is

    • Sensible heat.

    • Specific heat.

    • Super heat.

    • Latent heat.

    Correct Answer
    A. Super heat.
  • 41. 

    (605) A good refrigerant will

    • Operate in moderate to high pressure.

    • Operate in low to moderate pressure.

    • Be semi-corrosive to metals.

    • Have a high boiling point.

    Correct Answer
    A. Operate in low to moderate pressure.
    Explanation
    A good refrigerant needs to operate in low to moderate pressure in order to efficiently transfer heat and cool the surrounding area. Operating in high pressure can lead to safety concerns and potential damage to the refrigeration system. Additionally, operating in low to moderate pressure allows for better control of the refrigerant flow and ensures optimal performance of the refrigeration system.

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  • 42. 

    (618) During an operational check of a self-generating nitrogen servicing cart (SGNSC) the engine is running at 3,000 revolutions per minute (rpm), but the nitrogen purity does not reach 95.5 percent within 30 minutes. Which is a probable cause of this malfunction?

    • Warming door is not lowered for cold weather operating conditions.

    • Low oil level in the feed air compressor lubricant separator tank.

    • Booster compressor defective.

    • Poor air ventilation.

    Correct Answer
    A. Warming door is not lowered for cold weather operating conditions.
    Explanation
    The probable cause of the malfunction is that the warming door is not lowered for cold weather operating conditions. This is because the question states that the nitrogen purity does not reach 95.5 percent within 30 minutes while the engine is running at 3,000 rpm. The warming door is responsible for maintaining the appropriate temperature inside the self-generating nitrogen servicing cart (SGNSC), and if it is not lowered during cold weather, it can lead to a decrease in nitrogen purity.

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  • 43. 

    (624) As soon as the MJ–1B engine starts, check for sufficient

    • Hydraulic pressure.

    • Battery charging.

    • Fuel pressure.

    • Oil pressure.

    Correct Answer
    A. Oil pressure.
    Explanation
    As soon as the MJ-1B engine starts, it is important to check for sufficient oil pressure. This is because oil pressure is crucial for the proper lubrication and functioning of the engine. Without sufficient oil pressure, the engine may experience excessive friction and wear, leading to potential damage or failure. Therefore, monitoring the oil pressure is a critical step to ensure the engine's performance and longevity.

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  • 44. 

    (633) In which position is the engine switch placed to energize the electric fuel pump, fuel solenoid, and regulator on the split deck maintenance platform?

    • RUN.

    • MODE.

    • START.

    • DRIVE.

    Correct Answer
    A. RUN.
    Explanation
    The engine switch is placed in the RUN position to energize the electric fuel pump, fuel solenoid, and regulator on the split deck maintenance platform. This position allows the engine to receive fuel and start running. The MODE, START, and DRIVE positions are not relevant for this purpose.

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  • 45. 

    (609) The ACE 802S air conditioner compressor switch must be held in the HOLD position when engaging the compressor in order to

    • Ensure the engine is at governed speed before engaging compressor.

    • Allow compressor oil and discharge pressures to stabilize.

    • Defrost the evaporator.

    • Build-up oil pressure.

    Correct Answer
    A. Allow compressor oil and discharge pressures to stabilize.
    Explanation
    When engaging the compressor in an ACE 802S air conditioner, it is important to hold the compressor switch in the HOLD position. This is done to allow the compressor oil and discharge pressures to stabilize. By holding the switch in the HOLD position, it ensures that the oil and pressure within the compressor have reached a stable state before engaging the compressor fully. This helps to prevent any sudden surges or fluctuations in the oil and pressure levels, which could potentially damage the compressor or affect its performance.

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  • 46. 

    (609) Which medium does the ACE 802S air conditioner heat boost system use to trim output air temperature?

    • Air.

    • Refrigerant.

    • Electric heater.

    • Engine coolant.

    Correct Answer
    A. Engine coolant.
    Explanation
    The ACE 802S air conditioner heat boost system uses engine coolant to trim the output air temperature. Engine coolant is a liquid that circulates through the engine and absorbs heat, which can then be used to regulate the temperature of the air being released by the air conditioner. This allows for precise control and adjustment of the output air temperature.

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  • 47. 

    (610) Which must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?

    • Permit refrigerant pressure to equalize.

    • Perform maximum refrigerant pump down.

    • Place heating/cooling switch in HEATING position.

    • Place the reversing valve lever in the HEATING position.

    Correct Answer
    A. Permit refrigerant pressure to equalize.
    Explanation
    To avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation, it is necessary to permit refrigerant pressure to equalize. This is important because when switching from COOLING to HEATING mode, there may be a pressure difference in the refrigerant system. Allowing the pressure to equalize ensures that there is no excessive pressure buildup or sudden changes in the system, which could potentially lead to damage.

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  • 48. 

    (619) The purpose of the low pressure pump on the MJ–2A–1 is to ensure a constant flow of fluid to the

    • Relief valves.

    • Aircraft pumps.

    • Low pressure filters.

    • High pressure pump.

    Correct Answer
    A. High pressure pump.
    Explanation
    The purpose of the low pressure pump on the MJ-2A-1 is not to ensure a constant flow of fluid to the relief valves, aircraft pumps, or low pressure filters. Instead, the low pressure pump is responsible for supplying fluid to the high pressure pump.

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  • 49. 

    (619) The output volume (gallons per minute) of the MJ–2A–1 hydraulic test stand high pressure pump is controlled by the

    • Volume control.

    • Flow control valve.

    • Compensator control.

    • Flowmeter assembly.

    Correct Answer
    A. Volume control.
    Explanation
    The correct answer is volume control. The output volume of the hydraulic test stand high pressure pump is controlled by the volume control. This means that the pump's output can be adjusted by manipulating the volume control, allowing for precise control over the amount of fluid being pumped per minute. The other options, flow control valve, compensator control, and flowmeter assembly, may play a role in the overall hydraulic system but they do not directly control the output volume of the pump.

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Quiz Review Timeline (Updated): Mar 22, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 06, 2017
    Quiz Created by
    Jason
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