Age 2A672 (Vol 2)

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  • 1/38 Questions

    (205) What preliminary set-up step, if skipped, would prevent the A/M32A-95 gas turbine compressor from starting?

    • Ensure the turbine air inlet and exhaust outlets are free of obstructions.
    • Set-up controls.
    • Set parking brake.
    • Open and secure the exhaust door.
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2A672 Quizzes & Trivia
About This Quiz

This quiz assesses knowledge on the EPU-6\/E frequency converter, focusing on operational troubleshooting, component inspection, and voltage regulation. It is designed for personnel involved in maintenance and operation of military electrical equipment.

Quiz Preview

  • 2. 

    (209) The nitrogen booster compressor on the self generating nitrogen servicing cart (SGNSC) operates

    • Electrically.

    • Pneumatically.

    • Hydraulically.

    • By a belt off the engine crank shaft.

    Correct Answer
    A. Hydraulically.
    Explanation
    The correct answer is hydraulically. The nitrogen booster compressor on the self-generating nitrogen servicing cart (SGNSC) operates using hydraulic power. This means that it is powered by a hydraulic system, which uses fluid pressure to generate the necessary force to operate the compressor. The hydraulic system typically consists of a pump, hydraulic fluid, and various valves and actuators to control the flow of fluid and generate the desired pressure. This method of operation allows for efficient and reliable operation of the nitrogen booster compressor on the SGNSC.

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  • 3. 

    (202) What component on the EPU-6/E frequency converter must be inspected prior to use?

    • Air inlets for blockage.

    • Wiring for secure mounting.

    • Maintenance panels for corrosion.

    • Interior air vents for secure mounting.

    Correct Answer
    A. Air inlets for blockage.
    Explanation
    Prior to using the EPU-6/E frequency converter, it is important to inspect the air inlets for blockage. This is because blockage in the air inlets can restrict the flow of air, leading to inadequate cooling of the converter. Inspecting the air inlets ensures that they are clear and free from any obstructions, allowing for proper airflow and preventing potential overheating issues.

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  • 4. 

    (201) During operation of the EPU-6/E frequency converter it is determined that E and F pin voltage is not needed for the aircraft. The operator places the loop/bypass/28V to aircraft switch to what position?

    • Bypass.

    • 28V to aircraft.

    • Loop.

    • Neutral.

    Correct Answer
    A. Bypass.
    Explanation
    During the operation of the EPU-6/E frequency converter, if it is determined that the E and F pin voltage is not needed for the aircraft, the operator should place the loop/bypass/28V to aircraft switch in the Bypass position. This means that the converter will bypass the E and F pin voltage and not supply it to the aircraft.

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  • 5. 

    (211) A supervisor documents a noncommissioned officer's (NCO) safety training on Air Force Form

    • 623.

    • 457.

    • 55.

    • 2426.

    Correct Answer
    A. 55.
    Explanation
    Air Force Form 623 is the form used for documenting performance feedback and counseling sessions for enlisted personnel. It is not the appropriate form for documenting safety training. Therefore, the correct answer is 55, indicating that the supervisor should use a different form for documenting the NCO's safety training.

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  • 6. 

    (212) Who determines the length of time it is considered economically feasible to repair a piece of equipment?

    • Supervisor.

    • Installation commander.

    • Uniform repair/replacement board.

    • Item management and the equipment specialist.

    Correct Answer
    A. Item management and the equipment specialist.
    Explanation
    Item management and the equipment specialist determine the length of time it is considered economically feasible to repair a piece of equipment. This is because they have the expertise and knowledge to assess the cost of repairing the equipment compared to the cost of replacing it. They consider factors such as the age of the equipment, availability of spare parts, and the overall condition of the equipment to make an informed decision on whether it is more cost-effective to repair or replace it. The supervisor, installation commander, and uniform repair/replacement board may provide input, but the final decision lies with item management and the equipment specialist.

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  • 7. 

    (203) What is the function of the deswirl ring on an A/M32A-95 gas turbine compressor?

    • Increase air pressure.

    • Decrease air velocity.

    • Smooth turbulent air flow.

    • Accelerate air.

    Correct Answer
    A. Smooth turbulent air flow.
    Explanation
    The deswirl ring on an A/M32A-95 gas turbine compressor is responsible for smoothing turbulent air flow. Turbulent air flow can cause inefficiencies and disruptions in the compressor's operation. The deswirl ring helps to minimize turbulence by redirecting the airflow in a more controlled and streamlined manner. This ensures that the air entering the compressor is uniform and consistent, allowing for optimal performance and efficiency.

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  • 8. 

    (209) What is the function of the auxiliary air system on the self generating nitrogen servicing cart (SGNSC)?

    • Powers the booster compressor.

    • Provides low pressure air for pneumatic tools.

    • Maintains 130°F air temperature to prevent condensation.

    • Provides air to the feed air compressor.

    Correct Answer
    A. Provides low pressure air for pneumatic tools.
    Explanation
    The function of the auxiliary air system on the self-generating nitrogen servicing cart (SGNSC) is to provide low pressure air for pneumatic tools. This means that the auxiliary air system supplies the necessary air pressure for operating tools that are powered by compressed air. It is not responsible for powering the booster compressor, providing air to the feed air compressor, or maintaining a specific air temperature to prevent condensation.

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  • 9. 

    (204) What prevents engine operation of an A/M32A-95 gas turbine compressor if oil pressure is low?

    • Fuel safety switch.

    • Oil pressure switch.

    • Oil filter bypass valve.

    • Oil pressure relief valve.

    Correct Answer
    A. Oil pressure switch.
    Explanation
    The oil pressure switch prevents engine operation of an A/M32A-95 gas turbine compressor if oil pressure is low. This switch is designed to monitor the oil pressure in the engine and if it falls below a certain threshold, it will send a signal to the engine control system to prevent the engine from starting or continuing to operate. This is an important safety feature as low oil pressure can lead to inadequate lubrication of the engine components, causing damage and potentially leading to engine failure.

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  • 10. 

    (208) What does frosting of a refrigeration system line or component indicate?

    • Open.

    • Blockage.

    • Condensing refrigerant.

    • Low refrigerant charge.

    Correct Answer
    A. Blockage.
    Explanation
    Frosting of a refrigeration system line or component indicates a blockage. When there is a blockage in the system, the flow of refrigerant is restricted, causing the temperature to drop below freezing. This leads to the formation of frost on the affected parts. The presence of frost indicates that there is an obstruction in the line or component, preventing the refrigerant from flowing freely.

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  • 11. 

    (210) What component determines the speed of the nitrogen booster compressor on the self generating nitrogen servicing cart (SGNSC)?

    • Engine.

    • End of stroke limit switch.

    • Directional control valve cycling control relay.

    • Programmable logic controller (PLC) circuit.

    Correct Answer
    A. Programmable logic controller (PLC) circuit.
    Explanation
    The speed of the nitrogen booster compressor on the self generating nitrogen servicing cart (SGNSC) is determined by the programmable logic controller (PLC) circuit. The PLC circuit controls and regulates the operation of the compressor, adjusting its speed as needed to maintain the desired nitrogen pressure. It receives input signals from various sensors and uses pre-programmed logic to control the compressor motor and maintain the required pressure levels.

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  • 12. 

    (209) What components on the self generating nitrogen servicing cart (SGNSC) separate the nitrogen from the oxygen?

    • FCV1, FCV2.

    • CYL1, CYL2.

    • PS1, TS4, TS5.

    • ASM1, ASM2

    Correct Answer
    A. ASM1, ASM2
    Explanation
    ASM1 and ASM2 are the components on the self generating nitrogen servicing cart (SGNSC) that separate the nitrogen from the oxygen.

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  • 13. 

    (205) Which switch on the A/M32A-95 gas turbine compressor starts the automatic starting cycle?

    • Inhibit switch.

    • Master switch.

    • Turbine Start switch.

    • Air Load switch.

    Correct Answer
    A. Turbine Start switch.
    Explanation
    The Turbine Start switch on the A/M32A-95 gas turbine compressor starts the automatic starting cycle. This switch is specifically designed to initiate the starting process of the turbine.

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  • 14. 

    (207) The engine on the MA-3D air conditioner is operating at 1250 revolutions per minute (RPM), but the blower clutch does not engage. What do you do?

    • Replace SW2.

    • Replace the engine speed control.

    • Check the MPU to make sure it's sending the proper signal to the engine speed control.

    • Nothing; this is normal operation. The blower clutch energizes at governed speed.

    Correct Answer
    A. Nothing; this is normal operation. The blower clutch energizes at governed speed.
  • 15. 

    (208) What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?

    • Vacuum leaks.

    • Pressure leaks.

    • Outward leaks.

    • Inward leaks.

    Correct Answer
    A. Inward leaks.
    Explanation
    Inward leaks occur in a refrigeration system when the pressure within the system is less than atmospheric pressure. This means that air or other substances from the surroundings are being drawn into the system, causing a loss of refrigerant and potentially affecting the overall efficiency of the system.

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  • 16. 

    (202) What is the minimum interval at which the input and output terminals of the EPU-6/E are inspected?

    • Annually.

    • Prior to use.

    • Semiannually.

    • Daily.

    Correct Answer
    A. Semiannually.
    Explanation
    The EPU-6/E requires the input and output terminals to be inspected at a minimum interval of semiannually. This means that the inspection should be conducted every six months. It is important to regularly inspect these terminals to ensure their proper functioning and prevent any potential issues or malfunctions. Inspecting them semiannually allows for timely detection of any problems and necessary maintenance or repairs to be carried out.

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  • 17. 

    (212) If you have an aerospace ground equipment (AGE) unit that is overhauled, it is considered to be how old at the completion of the overhaul?

    • 1 year.

    • 18 months.

    • 2 years.

    • 30 months.

    Correct Answer
    A. 2 years.
    Explanation
    When an aerospace ground equipment (AGE) unit is overhauled, it is considered to be 2 years old at the completion of the overhaul. This means that the overhaul process takes into account the previous age of the unit and adds 2 years to it. Therefore, if the unit was brand new before the overhaul, it would be 2 years old afterwards.

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  • 18. 

    (203) What A/M32A-95 gas turbine compressor engine component accelerates hot expanding gases and directs them into the nozzle ring?

    • Plenum.

    • Combustor cap.

    • Combustor can.

    • Torus assembly.

    Correct Answer
    A. Torus assembly.
    Explanation
    The torus assembly is the component of the A/M32A-95 gas turbine compressor engine that accelerates hot expanding gases and directs them into the nozzle ring. This component plays a crucial role in the functioning of the engine by controlling the flow of gases and ensuring efficient combustion. The other options mentioned, such as plenum, combustor cap, and combustor can, do not perform the specific function of accelerating and directing gases into the nozzle ring.

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  • 19. 

    (204) Refer to foldout 2. What component on an A/M32A-95 gas turbine compressor energizes SV4?

    • Master switch.

    • Air load valve.

    • Air load switch.

    • Oil pressure switch.

    Correct Answer
    A. Air load switch.
    Explanation
    The correct answer is "Air load switch." The air load switch is the component on an A/M32A-95 gas turbine compressor that energizes SV4. It controls the air load valve, which regulates the amount of air entering the compressor. By energizing SV4, the air load switch ensures that the compressor receives the appropriate air load for optimal operation.

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  • 20. 

    (203) What component on an A/M32A-95 gas turbine compressor isolates the second stage air from the operation of the first stage compressor?

    • Interstage ducts.

    • Interstage seal.

    • Impellers.

    • Inducers

    Correct Answer
    A. Interstage seal.
    Explanation
    The interstage seal on an A/M32A-95 gas turbine compressor isolates the second stage air from the operation of the first stage compressor. This seal acts as a barrier between the two stages, preventing any air leakage or mixing between them. It ensures that the second stage operates independently and efficiently without any interference from the first stage. The interstage seal is crucial for maintaining the performance and functionality of the gas turbine compressor.

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  • 21. 

    (206) The heat sink on the MA-3D

    • Circulates the ethylene glycol/water solution.

    • Cools the ethylene glycol/water solution.

    • Cools discharge air from the blower.

    • Cools ambient air.

    Correct Answer
    A. Cools the ethylene glycol/water solution.
    Explanation
    The heat sink on the MA-3D cools the ethylene glycol/water solution. This means that the heat sink is responsible for reducing the temperature of the ethylene glycol/water solution, likely to prevent it from overheating or to maintain a desired temperature. The other options, such as cooling discharge air from the blower or cooling ambient air, do not directly relate to the function of the heat sink on the MA-3D.

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  • 22. 

    (206) The temperature controller on an MA-3D air conditioner opens the hot gas bypass valve if the

    • Suction pressure is too high so the boiling point of the refrigerant must be decreased to decrease the output air temperature.

    • Air pressure is too low so the boiling point of the R134a must be increased.

    • Suction pressure is too low so the boiling point of the refrigerant must be increased to increase the output air temperature.

    • Suction air pressure is too high so the boiling point of the refrigerant can be decreased.

    Correct Answer
    A. Suction pressure is too low so the boiling point of the refrigerant must be increased to increase the output air temperature.
    Explanation
    When the suction pressure is too low, it means that there is not enough refrigerant entering the compressor. This can result in a decrease in the boiling point of the refrigerant, which in turn decreases the output air temperature. To counteract this, the hot gas bypass valve is opened, allowing more refrigerant to bypass the evaporator and enter the compressor. This increases the suction pressure and raises the boiling point of the refrigerant, leading to an increase in the output air temperature. Therefore, the correct answer is that when the suction pressure is too low, the boiling point of the refrigerant must be increased to increase the output air temperature.

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  • 23. 

    (202) During operation of the EPU-6/E frequency converter the operator determines that there is an under voltage (UV) fault problem with the unit. What component could be malfunctioning?

    • The audible alarm switch is in the silence position.

    • The voltage control board potentiometer is shorted.

    • The ouput trim potentiometer is centered.

    • The analog board has failed.

    Correct Answer
    A. The analog board has failed.
    Explanation
    The given correct answer is that the analog board has failed. This means that there is a problem with the analog board of the EPU-6/E frequency converter, which is causing the under voltage (UV) fault. The analog board is responsible for controlling and regulating the voltage output of the converter. If it fails, it can result in an under voltage condition.

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  • 24. 

    (204) On an A/M32A-95 gas turbine compressor what chambers are pressurized when the butterfly valve is closed?

    • 1 & 3

    • 2 & 4

    • 1, 2, and 3.

    • 1, 3, and 4.

    Correct Answer
    A. 1, 3, and 4.
    Explanation
    When the butterfly valve is closed on an A/M32A-95 gas turbine compressor, chambers 1, 3, and 4 are pressurized.

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  • 25. 

    (204) What prevents overpressurization of the bearing cavity on an A/M32A-95 gas turbine compressor?

    • Oil jet.

    • Oil cooler.

    • Scavange pump.

    • Oil tank vent line.

    Correct Answer
    A. Oil tank vent line.
    Explanation
    The oil tank vent line prevents overpressurization of the bearing cavity on an A/M32A-95 gas turbine compressor. This is because the vent line allows excess pressure to be released from the bearing cavity, ensuring that the pressure remains within safe limits. Without the vent line, the pressure could build up to dangerous levels, potentially causing damage to the compressor.

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  • 26. 

    (206) What component of an MA-3D air conditioner increases the ambient air temperature approximately 60 degrees Fahrenheit?

    • Compressor.

    • Blower.

    • Evaporator.

    • Aftercooler.

    Correct Answer
    A. Blower.
    Explanation
    The blower component of an MA-3D air conditioner increases the ambient air temperature approximately 60 degrees Fahrenheit. The blower is responsible for circulating the air through the system and pushing it over the evaporator coils. As the air passes over the coils, it absorbs heat, causing the temperature to rise. Therefore, the blower plays a crucial role in increasing the ambient air temperature in the air conditioning process.

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  • 27. 

    (212) To whom does the maintenance organization submit the Air force Technical Order (AFTO) Form 375?

    • Equipment specialist.

    • Item manger.

    • MAJCOM HQ.

    • Uniform repair/replacement board.

    Correct Answer
    A. MAJCOM HQ.
    Explanation
    The maintenance organization submits the Air Force Technical Order (AFTO) Form 375 to the MAJCOM HQ. This is the correct answer because the MAJCOM HQ is responsible for overseeing and coordinating maintenance activities within the Air Force. They are in charge of ensuring that all technical orders and procedures are followed correctly, so it makes sense that the AFTO Form 375 would be submitted to them for review and approval. The other options, such as the item manager, equipment specialist, and uniform repair/replacement board, do not have the authority or responsibility to review and approve the AFTO Form 375.

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  • 28. 

    (202) During operation of the EPU-6/E frequency converter the operator determines that one phase voltage is lower than the other two phases. What could cause the malfunction?

    • Malfunctioning transistor.

    • Improper SCR firing adjustment.

    • Burnt control transformer fuse.

    • Loose push-on connector on the output filter capacitor.

    Correct Answer
    A. Loose push-on connector on the output filter capacitor.
    Explanation
    A loose push-on connector on the output filter capacitor could cause the malfunction because it can result in a poor connection, leading to a decrease in voltage on one phase. This can disrupt the balance of the three-phase system and cause one phase voltage to be lower than the others.

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  • 29. 

    (204) Refer to foldout 2. The A/M32A-95 runs up to 60 percent but the battery is not charging. What is the probable cause of this trouble?

    • K4 energized and its contacts closed.

    • K3 de-energized and its contacts opened.

    • K4 de-energized and its contacts closed.

    • K3 de-energized and the contacts did not remain closed.

    Correct Answer
    A. K3 de-energized and the contacts did not remain closed.
    Explanation
    The probable cause of the trouble is that K3 is de-energized and its contacts did not remain closed. This means that the circuit responsible for charging the battery is not functioning properly, resulting in the battery not being charged even though the A/M32A-95 is running at 60 percent.

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  • 30. 

    (204) The acceleration limiter valve on the A/M32A-95 gas turbine compressor operates a poppet valve to control fuel flow to the atomizer using control air pressure combined with

    • Plenum air pressure.

    • Fuel pressure.

    • Oil pressure.

    • Spring tension.

    Correct Answer
    A. Spring tension.
    Explanation
    The acceleration limiter valve on the A/M32A-95 gas turbine compressor uses spring tension to control fuel flow to the atomizer. This means that the valve is designed to open or close based on the tension of the spring, which regulates the amount of fuel being supplied. The control air pressure and plenum air pressure mentioned in the question are not directly involved in the operation of the poppet valve, making them incorrect options. Similarly, fuel pressure and oil pressure are also not mentioned as factors in controlling the fuel flow, making them incorrect options as well.

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  • 31. 

    (206) While you are operating an MA-3D air conditioner, the output air temperature is too high, as you set the temperature control to maximum cooling. The temperature controller sends a signal to

    • B7 which steps closed to meter refrigerant into the evaporator.

    • B7 which steps open to meter refrigerant into the evaporator.

    • The quench valve which opens to aid in cooling.

    • S1 and S2 which open to aid in cooling.

    Correct Answer
    A. B7 which steps open to meter refrigerant into the evaporator.
    Explanation
    The correct answer is B7 which steps open to meter refrigerant into the evaporator. This means that when the output air temperature is too high, the temperature controller sends a signal to B7 to open up, allowing more refrigerant to flow into the evaporator. This increased flow of refrigerant helps to cool down the air being outputted by the air conditioner.

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  • 32. 

    (207) You place the MA-3D air conditioner SW1 in the START position, but the engine does not operate. What is the probable cause of this trouble?

    • Override switch is not closed.

    • K7 contacts are closed.

    • Overspeed switch is closed.

    • Oil pressure switch is closed.

    Correct Answer
    A. Override switch is not closed.
    Explanation
    The probable cause of the engine not operating when the MA-3D air conditioner SW1 is placed in the START position is that the override switch is not closed. The override switch is responsible for bypassing certain safety features and allowing the engine to start. If the switch is not closed, it means that the safety features are still active and preventing the engine from starting.

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  • 33. 

    (204) What component on the A/M32A-95 gas turbine compressor closes to complete the electrical circuit to the fuel solenoid and ignition unit?

    • Turbine start switch.

    • 35 percent centrifugal speed switch.

    • Load switch.

    • Oil pressure switch.

    Correct Answer
    A. Oil pressure switch.
    Explanation
    The oil pressure switch on the A/M32A-95 gas turbine compressor closes to complete the electrical circuit to the fuel solenoid and ignition unit. This means that when the oil pressure reaches a certain level, it triggers the switch to close, allowing the electrical circuit to be completed and enabling the fuel solenoid and ignition unit to function properly. The oil pressure switch acts as a safety measure to ensure that there is sufficient oil pressure before the fuel solenoid and ignition unit are activated.

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  • 34. 

    (201) What components receive potential directly from the input auto transformer.

    • Input circuit breakers and display power supply.

    • Control transformer and voltage control.

    • SCR voltage regulator and phase sequence transformers.

    • Analog board and alarm display.

    Correct Answer
    A. SCR voltage regulator and phase sequence transformers.
    Explanation
    The components that receive potential directly from the input auto transformer are the SCR voltage regulator and phase sequence transformers.

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  • 35. 

    (210) What causes the starter solenoid on the self generating nitrogen servicing cart (SGNSC) to disengage during normal operation?

    • Alternator output.

    • Oil pressure switch.

    • Ignition switch released.

    • Centrifugal switch opens.

    Correct Answer
    A. Alternator output.
    Explanation
    The correct answer is Alternator output. The starter solenoid on the self generating nitrogen servicing cart (SGNSC) disengages during normal operation when the alternator output is detected. This is likely due to a safety feature that prevents the starter from engaging when the alternator is generating power, indicating that the engine is already running. This helps to protect the starter motor and prevent unnecessary wear and tear.

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  • 36. 

    (204) Refer to foldout 2. During an operational check of an A/M32A-95 gas turbine compressor, you place the air load switch S2 in the ON position. the butterfly valve starts to open at 95 percent. What do you check?

    • SV2.

    • S10.

    • TD2.

    • K6.

    Correct Answer
    A. TD2.
    Explanation
    During an operational check of an A/M32A-95 gas turbine compressor, when the air load switch S2 is placed in the ON position and the butterfly valve starts to open at 95 percent, you would check TD2.

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  • 37. 

    (205) Refer to foldout 2. The A/M32A-95 engine cranks but doesn't start. What is the probable cause of this trouble?

    • CB3 is open.

    • S9 is shorted.

    • SV1 coil is open.

    • K7 is not energizing.

    Correct Answer
    A. SV1 coil is open.
    Explanation
    The probable cause of the engine cranking but not starting is that the SV1 coil is open. The open coil would prevent the necessary electrical current from flowing through the coil, which is essential for the engine to start. Without the coil functioning properly, the engine cannot ignite the fuel and begin running.

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  • 38. 

    (207) What component on the MA-3D air conditioner provides 24 volts alternating current (VAC) for operation of the temperature controller?

    • Generator (G1).

    • Alternator (G2).

    • Transformer rectifier (TR1).

    • Power monitor relay (PMR)

    Correct Answer
    A. Transformer rectifier (TR1).
    Explanation
    The correct answer is Transformer rectifier (TR1). The TR1 component on the MA-3D air conditioner provides 24 volts alternating current (VAC) for operation of the temperature controller.

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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
  • Nov 05, 2016
    Quiz Created by
    Lo973k3p

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