2A652 (Age Journeyman) Volume 3, Edit Code 6

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  • 1/123 Questions

    (401) When a motor continues turning after reaching its limit, this is known as

    • Inertia.
    • Impedance.
    • Inductance.
    • Eddy currents.
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About This Quiz

This quiz for 2A652 (AGE Journeyman) Volume 3, Edit Code 6 assesses knowledge on converting electrical energy to mechanical energy, motor inertia, torque, and induction motor operations. It's designed for learners aiming to master practical applications in aerospace ground equipment.

2A652 (Age Journeyman) Volume 3, Edit Code 6 - Quiz

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  • 2. 

    (407) The first thing you should do when troubleshooting a motor is perform a

    • Voltage check.

    • Continuity test.

    • Visual inspection.

    • Current measurement.

    Correct Answer
    A. Visual inspection.
    Explanation
    When troubleshooting a motor, the first thing you should do is perform a visual inspection. This involves visually inspecting the motor for any obvious signs of damage, such as loose connections, burnt wires, or broken parts. By conducting a visual inspection, you can identify any visible issues that may be causing the problem with the motor. This step is important because it allows you to quickly identify and address any visible problems before moving on to more complex diagnostic tests.

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  • 3. 

    (413) The maintenance procedure that is considered to be the cheapest and most effective means of reducing injection equipment problems and maintenance costs is

    • Correct defective components only.

    • Rigid maintenance schedules.

    • Periodic overhaul schedule.

    • Preventive maintenance.

    Correct Answer
    A. Preventive maintenance.
    Explanation
    Preventive maintenance is the most cost-effective procedure for reducing injection equipment problems and maintenance costs. It involves regularly inspecting and servicing equipment to prevent breakdowns and identify potential issues before they become major problems. By conducting routine maintenance, such as cleaning, lubricating, and replacing worn parts, the chances of equipment failure are significantly reduced. This proactive approach helps extend the lifespan of the equipment, improves its performance, and minimizes the need for costly repairs or component replacements.

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  • 4. 

    (423) Common or frequently occurring troubles in a unit, their cause, and remedies may be found in the

    • Historical record.

    • Maintenance record.

    • Troubleshooting chart.

    • Illustrated parts breakdown.

    Correct Answer
    A. Troubleshooting chart.
    Explanation
    A troubleshooting chart is a tool that provides a systematic approach to identify and resolve common or frequently occurring troubles in a unit. It contains a list of potential problems, their causes, and recommended remedies. By referring to the troubleshooting chart, technicians can quickly diagnose and fix issues, saving time and effort. The historical record and maintenance record may contain information about past problems and their solutions, but they may not provide a structured and organized approach like a troubleshooting chart does. The illustrated parts breakdown, on the other hand, is a visual representation of the unit's components and may not include troubleshooting information.

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  • 5. 

    (402) Torque is defined as

    • Wattage.

    • Horsepower.

    • Rotational force.

    • Opposition to applied voltage.

    Correct Answer
    A. Rotational force.
    Explanation
    Torque is defined as rotational force. It is the measure of the force that can cause an object to rotate around an axis. Torque is dependent on both the force applied and the distance from the axis of rotation. It is commonly used in physics and engineering to describe the turning or twisting force applied to an object. Wattage and horsepower are units used to measure power, while opposition to applied voltage refers to resistance.

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  • 6. 

    (413) The filtration step protects the diesel engine fuel system from

    • Blockage of airflow.

    • Lube system malfunctions.

    • Slipping belts on the blower.

    • Abrasion by foreign particles.

    Correct Answer
    A. Abrasion by foreign particles.
    Explanation
    The filtration step in the diesel engine fuel system is designed to protect the system from abrasion caused by foreign particles. These particles can enter the fuel system and cause damage to the engine components if not filtered out. By removing these particles, the filtration step ensures that the fuel flowing through the system is clean and free from any abrasive contaminants that could potentially cause blockage or damage. This helps to maintain the efficiency and longevity of the fuel system and prevents any potential malfunctions or failures.

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  • 7. 

    (414) The first thing you should do when operating a diesel engine is to

    • Retorque the engine-mount bolts.

    • Drain moisture from fuel system.

    • Perform a preoperational check.

    • Perform a periodic inspection.

    Correct Answer
    A. Perform a preoperational check.
    Explanation
    When operating a diesel engine, it is important to perform a preoperational check. This involves checking various components of the engine to ensure they are in proper working condition before starting the engine. This helps to identify any potential issues or malfunctions that could affect the engine's performance or safety. Retorquing the engine-mount bolts, draining moisture from the fuel system, and performing a periodic inspection are also important maintenance tasks for a diesel engine, but they are not the first thing that should be done when operating the engine.

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  • 8. 

    (420) If the gas turbine compressor (GTC) load control butterfly valve opens too slowly or too quickly, what is the most probable cause of the malfunction?

    • Excessive exhaust gas temperature.

    • Maladjusted rate adjustment screw.

    • Ruptured actuator diaphragm.

    • Defective relief valve.

    Correct Answer
    A. Maladjusted rate adjustment screw.
    Explanation
    If the gas turbine compressor (GTC) load control butterfly valve opens too slowly or too quickly, the most probable cause of the malfunction is a maladjusted rate adjustment screw. This screw controls the rate at which the valve opens and closes, so if it is not properly adjusted, it can result in the valve opening too slowly or too quickly. This can lead to inefficiencies in the turbine's operation and affect its performance.

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  • 9. 

    (429) Three different loads can be supported at the same time by a

    • Direct current (DC) generator.

    • Single-phase generator.

    • Two-phase generator.

    • Three-phase generator.

    Correct Answer
    A. Three-phase generator.
    Explanation
    A three-phase generator is capable of supporting three different loads simultaneously because it generates three separate alternating currents that are 120 degrees out of phase with each other. This allows for a more balanced and efficient distribution of power to the loads, compared to single-phase or two-phase generators which can only support one or two loads respectively.

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  • 10. 

    (442) Before the A/M32A–60A generator set is started, the operator must perform

    • Only minor repairs.

    • Any needed repairs.

    • A periodic inspection.

    • An operation inspection.

    Correct Answer
    A. An operation inspection.
    Explanation
    Before the A/M32A-60A generator set is started, the operator must perform an operation inspection. This means that the operator needs to inspect the generator set to ensure that it is in proper working condition and ready to be operated. This inspection may include checking for any visible damage, leaks, or loose connections, as well as ensuring that all necessary components are in place and functioning correctly. By performing an operation inspection, the operator can identify and address any potential issues or malfunctions before starting the generator set, ensuring safe and efficient operation.

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  • 11. 

    (430) What provides power for operating the load bank control circuits?

    • Unit under test (UUT).

    • Load bank generators.

    • External batteries.

    • Facility power.

    Correct Answer
    A. Unit under test (UUT).
    Explanation
    The correct answer is "Unit under test (UUT)". The unit under test refers to the equipment or system being tested. In this context, it means that the power for operating the load bank control circuits is provided by the unit under test itself. This implies that the load bank control circuits are connected to the UUT and draw power from it to operate.

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  • 12. 

    (439) On the A/M32A–60A, the short-circuit relay

    • Connects the batteries together.

    • Protects the exciter field circuit.

    • Allows two generators to be paralleled.

    • Allows for quick warm-up of the batteries.

    Correct Answer
    A. Protects the exciter field circuit.
    Explanation
    The short-circuit relay on the A/M32A-60A is responsible for protecting the exciter field circuit. This means that it helps prevent any damage or malfunction in the exciter field circuit by detecting and interrupting any short-circuits that may occur. This is important because the exciter field circuit is a critical component in generating power, and any damage to it could lead to a loss of power or even equipment failure. Therefore, the short-circuit relay plays a crucial role in ensuring the proper functioning and protection of the exciter field circuit.

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  • 13. 

    (441) How often are service inspections required?

    • After equipment is placed on the ready line.

    • After maintenance.

    • Once a week.

    • Once a day.

    Correct Answer
    A. After maintenance.
    Explanation
    Service inspections are required after maintenance because maintenance activities can affect the performance and condition of the equipment. By conducting inspections after maintenance, any potential issues or problems that may have arisen during the maintenance process can be identified and addressed promptly. This helps to ensure that the equipment is in proper working order and ready for use. Inspections after maintenance also help to prevent any potential safety hazards or equipment failures that could occur if the equipment is not thoroughly checked after maintenance activities.

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  • 14. 

    (421) During a preoperational inspection of a gas turbine engine, you check the intake and exhaust for

    • Leakage.

    • Excess heat.

    • Hairline cracks.

    • Foreign objects.

    Correct Answer
    A. Foreign objects.
    Explanation
    During a preoperational inspection of a gas turbine engine, it is important to check the intake and exhaust for foreign objects. This is because foreign objects, such as debris or particles, can obstruct the airflow and cause damage to the engine. Checking for leakage, excess heat, and hairline cracks are also important aspects of the inspection, but in this case, the focus is specifically on identifying and removing any foreign objects that may be present in the intake and exhaust areas.

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  • 15. 

    (432) What happens when the A/M24T–16 load bank set load time has been reached?

    • The load is automatically removed and the cooling cycle begins.

    • The load bank will start the load test over again.

    • The load bank will automatically shuts down.

    • The display will show results of the load test.

    Correct Answer
    A. The load is automatically removed and the cooling cycle begins.
    Explanation
    When the A/M24T-16 load bank set load time has been reached, the load is automatically removed and the cooling cycle begins.

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  • 16. 

    (437) To use the fuel from all of its tanks, the A/M32A–60A has a

    • Fuel gravity system.

    • Fuel transfer system.

    • Low fuel level safety circuit.

    • Manually operated switch to change tanks.

    Correct Answer
    A. Fuel transfer system.
    Explanation
    The A/M32A-60A uses a fuel transfer system in order to utilize the fuel from all of its tanks. This system allows for the transfer of fuel between tanks, ensuring that all available fuel is used efficiently. This is necessary to maximize the aircraft's range and operational capabilities. A fuel gravity system would rely on the natural flow of fuel due to gravity, which may not be sufficient for utilizing all fuel. A low fuel level safety circuit would be a safety feature to monitor fuel levels, but it does not address the issue of using fuel from all tanks. A manually operated switch to change tanks would require manual intervention and may not be as efficient as a fuel transfer system.

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  • 17. 

    (437) On the A/M32A–60A, the speed at which the butterfly valve opens is determined by

    • Chamber 2 pressure.

    • Chamber 4 pressure.

    • The rate adjustment screw.

    • The dual-ball selector valve.

    Correct Answer
    A. The rate adjustment screw.
    Explanation
    The correct answer is the rate adjustment screw. The speed at which the butterfly valve opens on the A/M32A-60A is determined by the rate adjustment screw. This screw allows for the adjustment of the flow rate of air, which in turn affects the speed at which the valve opens. By adjusting the rate adjustment screw, the operator can control the speed of the valve opening to meet the specific requirements of the system.

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  • 18. 

    (443) To find out where a wire is connected, you should consult the

    • Flow chart.

    • Wiring diagram.

    • Schematic diagram.

    • Reference designation list.

    Correct Answer
    A. Wiring diagram.
    Explanation
    A wiring diagram is a visual representation of the electrical connections and components in a system. It provides detailed information about the wiring and connections, making it the most suitable resource for finding out where a wire is connected. A flow chart is used to represent a process or decision-making flow, not specific wiring information. A schematic diagram shows the electrical circuitry but may not provide specific wire connection details. A reference designation list is a list of components and their corresponding designations, but it does not provide information about wire connections. Therefore, the most appropriate resource to consult in order to find out where a wire is connected is a wiring diagram.

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  • 19. 

    (430) The A/M24T–16 electrical test set is capable of testing

    • Aerospace ground equipment (AGE) generator sets only.

    • Alternating current (AC) power supplies only.

    • Direct current (DC) power supplies only.

    • AC and DC power supplies.

    Correct Answer
    A. AC and DC power supplies.
    Explanation
    The A/M24T-16 electrical test set is capable of testing both AC and DC power supplies. This means that it can be used to test and diagnose electrical systems that use either alternating current or direct current as their power source. It is not limited to testing aerospace ground equipment (AGE) generator sets or only AC or DC power supplies, but rather has the capability to handle both types of power supplies.

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  • 20. 

    (435) The resistive elements on the A/M24T–8 test set are best cleaned by

    • Blowing off with 5 pounds per square inch (psi) uncontaminated air.

    • Blowing off with 15 psi uncontaminated air.

    • Scrubbing with soap and water.

    • Steam cleaning.

    Correct Answer
    A. Blowing off with 5 pounds per square inch (psi) uncontaminated air.
    Explanation
    The resistive elements on the A/M24T-8 test set are best cleaned by blowing off with 5 pounds per square inch (psi) uncontaminated air. This method is effective because it uses air pressure to remove any dirt or debris that may have accumulated on the resistive elements. Blowing off with 5 psi ensures that enough pressure is applied to effectively clean the elements without causing any damage. Using uncontaminated air is important to prevent introducing any additional contaminants that could affect the performance of the test set.

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  • 21. 

    (445) What is the purpose of the protective circuits of the A/M32A–86D?

    • Protects the generator electrical system against damage resulting from an overload, overvoltage, undervoltage, and over/underfrequency.

    • Protects the aircraft electrical system against damage resulting from an overload, overvoltage, undervoltage, and over/underfrequency.

    • Senses fault conditions, stopping the generator.

    • Senses fault conditions, stopping the engine.

    Correct Answer
    A. Protects the aircraft electrical system against damage resulting from an overload, overvoltage, undervoltage, and over/underfrequency.
    Explanation
    The protective circuits of the A/M32A-86D serve to safeguard the aircraft electrical system from potential harm caused by various factors such as overload, overvoltage, undervoltage, and over/underfrequency. These circuits are designed to detect fault conditions and prevent any damage to the electrical system by interrupting the power supply or taking appropriate corrective actions.

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  • 22. 

    (455) What is the minimum amount of time to operate the B809 generator while performing at load test?

    • 5 minutes.

    • 10 minutes.

    • 15 minutes.

    • 20 minutes.

    Correct Answer
    A. 15 minutes.
    Explanation
    The minimum amount of time required to operate the B809 generator while performing at load test is 15 minutes. This duration is necessary to ensure that the generator is properly tested under load conditions and can sustain its performance over an extended period. Operating the generator for a shorter time may not provide accurate results or sufficient data to assess its performance and reliability.

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  • 23. 

    (408) In component removal, if wires are to be soldered, do not

    • Resolder them until they have been bench checked.

    • Cut them, but remove the wiring completely intact.

    • Resolder them until all wiring has been replaced with new wires.

    • Cut them unless there is sufficient length remaining for resoldering.

    Correct Answer
    A. Cut them unless there is sufficient length remaining for resoldering.
    Explanation
    When performing component removal, it is advised not to resolder the wires until they have been bench checked. Instead, the recommended approach is to cut the wires unless there is enough length left for resoldering. This ensures that the wiring is intact and can be properly replaced if needed.

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  • 24. 

    (418) The boost pump on the gas turbine engine provides fuel to the

    • Fuel atomizer.

    • Main fuel pump.

    • Combustion chamber.

    • Fuel air mixture valve.

    Correct Answer
    A. Main fuel pump.
    Explanation
    The boost pump on the gas turbine engine provides fuel to the main fuel pump. The main fuel pump is responsible for supplying pressurized fuel to the combustion chamber. The boost pump helps to ensure a consistent flow of fuel to the main fuel pump, ensuring proper fuel delivery to the combustion chamber for efficient combustion.

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  • 25. 

    (424) Which causes gray or white smoke to pour from the exhaust stack on the gas turbine compressor (GTC)?

    • Excessive engine revolutions per minute (rpm).

    • Excessive engine exhaust temperature.

    • Oil that enters the airflow system.

    • Fuel mixing with the airflow.

    Correct Answer
    A. Oil that enters the airflow system.
    Explanation
    When oil enters the airflow system of a gas turbine compressor (GTC), it can cause gray or white smoke to pour from the exhaust stack. This is because the oil burns and creates smoke when it comes into contact with the hot components of the engine. Excessive engine revolutions per minute (rpm) do not directly cause smoke from the exhaust stack. Similarly, excessive engine exhaust temperature and fuel mixing with the airflow may cause other issues, but they are not specifically related to the smoke pouring from the exhaust stack.

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  • 26. 

    (442) The health hazards associated with the gas turbine generator set include

    • Its operating 5 times faster than a car engine.

    • Noise, intense heat, and electrical shock.

    • Excessive carbon monoxide buildup.

    • Turbine wheel disintegration.

    Correct Answer
    A. Noise, intense heat, and electrical shock.
    Explanation
    The health hazards associated with the gas turbine generator set include noise, intense heat, and electrical shock. Gas turbine generator sets produce a significant amount of noise due to the high-speed rotation of the turbine blades and the combustion process. This noise can lead to hearing damage and other related health issues. Additionally, the intense heat generated by the turbine can cause burns and other thermal injuries if proper precautions are not taken. Finally, the presence of electrical components and high voltage in the generator set poses a risk of electrical shock, which can be fatal or cause severe injuries.

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  • 27. 

    (444) When the "flag" of the air service indicator is locked into the top of the viewing chamber, what does this mean?

    • Pressure sufficient for bleed operations.

    • Air filter sufficient for operations.

    • Pressure sufficient for operations.

    • Air filter needs to be changed.

    Correct Answer
    A. Air filter needs to be changed.
    Explanation
    When the "flag" of the air service indicator is locked into the top of the viewing chamber, it indicates that the air filter needs to be changed. This is because the "flag" serves as a visual indicator that the air filter has become dirty or clogged and needs to be replaced.

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  • 28. 

    (405) The stator windings of a synchronous motor are spaced

    • 20 degrees apart.

    • 30 degrees apart.

    • 90 degrees apart.

    • 120 degrees apart.

    Correct Answer
    A. 120 degrees apart.
    Explanation
    The stator windings of a synchronous motor are spaced 120 degrees apart. This is because a synchronous motor operates on the principle of magnetic fields rotating at a synchronous speed. The stator windings are responsible for creating the rotating magnetic field, and in order to achieve a smooth and efficient rotation, the windings need to be evenly spaced around the stator. A spacing of 120 degrees ensures that the magnetic field produced by each winding is evenly distributed and allows for optimal performance of the motor.

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  • 29. 

    (411) What component holds a large amount of coolant in close contact with a large volume of air?

    • Radiator cap.

    • Thermostat.

    • Water pump.

    • Radiator.

    Correct Answer
    A. Radiator.
    Explanation
    The radiator holds a large amount of coolant in close contact with a large volume of air. It is designed to transfer heat from the coolant to the surrounding air, allowing the coolant to cool down before it is circulated back into the engine. The radiator consists of a series of tubes and fins that increase the surface area for better heat dissipation. As coolant flows through the tubes, it releases heat to the fins, and the air passing over the fins carries away the heat, cooling the coolant in the process.

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  • 30. 

    (426) Which three things are necessary to produce an electromotive force (EMF) mechanically?

    • EMF, relative motion, and magnetic field.

    • Magnet, lines of force, and relative motion.

    • Magnetic field, a conductor, and relative motion.

    • Counter-electromotive force (CEMF), a conductor, and magnetic field.

    Correct Answer
    A. Magnetic field, a conductor, and relative motion.
    Explanation
    To produce an electromotive force (EMF) mechanically, three things are necessary: a magnetic field, a conductor, and relative motion. The presence of a magnetic field induces a voltage in a conductor when there is relative motion between them. This phenomenon is known as electromagnetic induction and is the basis for generating electricity in devices such as generators and alternators. The magnetic field interacts with the moving conductor, creating a force that pushes the electrons in the conductor, resulting in the generation of an EMF.

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  • 31. 

    (449) What component on the EPU–6/E frequency converter stops input voltage if the bottom door is open?

    • Safety interlock.

    • EF line fuse.

    • Start switch.

    • Stop switch.

    Correct Answer
    A. Safety interlock.
    Explanation
    The safety interlock on the EPU-6/E frequency converter is the component that stops the input voltage if the bottom door is open. This is an important safety feature to prevent any accidents or damage that could occur if the converter is accessed while it is still powered. The safety interlock ensures that the input voltage is cut off whenever the bottom door is open, providing a safe working environment for maintenance or troubleshooting activities.

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  • 32. 

    (450) Before using the EPU–6/E frequency converter, you must inspect the

    • 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
    Before using the EPU-6/E frequency converter, it is necessary to inspect the air inlets for blockage. This is important 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 there are no obstructions that could hinder the proper functioning of the converter.

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  • 33. 

    (416) During starting, the turbine engine is rotated up to 20 percent by the

    • Alternating current (AC) generator.

    • Fuel pump and control unit.

    • Tachometer generator.

    • Starter motor.

    Correct Answer
    A. Starter motor.
    Explanation
    During starting, the turbine engine needs to be rotated in order to initiate the combustion process. The rotating motion is provided by the starter motor, which is specifically designed for this purpose. The AC generator, fuel pump and control unit, and tachometer generator are not responsible for rotating the turbine engine during starting.

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  • 34. 

    (418) The turbine engine component that prevents fuel from accumulating in the plenum is the

    • Atomizer.

    • Drain valve.

    • Pneumatic control device.

    • Acceleration limiter valve.

    Correct Answer
    A. Drain valve.
    Explanation
    The drain valve is the turbine engine component that prevents fuel from accumulating in the plenum. The plenum is a chamber where fuel is stored before being injected into the combustion chamber. If fuel were to accumulate in the plenum, it could result in a dangerous buildup of fuel that could potentially cause an explosion. The drain valve is responsible for removing any excess fuel or condensation that may collect in the plenum, ensuring safe and efficient operation of the turbine engine.

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  • 35. 

    (434) The preliminary setup step that must be taken for the portable load bank to function properly is to position the

    • Cooling fans blowing into prevailing wind.

    • Cooling fans blowing not into prevailing wind.

    • Load bank close to generator to eliminate line drop.

    • Load bank as far as possible from generator for cooling.

    Correct Answer
    A. Cooling fans blowing not into prevailing wind.
    Explanation
    The correct answer is "cooling fans blowing not into prevailing wind." This is because positioning the cooling fans to blow against the prevailing wind would create a counterproductive airflow, hindering the cooling process. By positioning the cooling fans to blow in a direction opposite to the prevailing wind, the load bank can effectively dissipate heat and maintain optimal operating conditions.

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  • 36. 

    (437) If the oil pressure switch opens during operation of A/M32A–60A, during which period does it stop operation?

    • From 0 to 35 percent.

    • From 35 to 95 percent.

    • From 95 to 100 percent.

    • Anytime during operation.

    Correct Answer
    A. Anytime during operation.
    Explanation
    The oil pressure switch is a safety device that monitors the oil pressure in the A/M32A-60A during operation. If the switch opens, it means that the oil pressure has dropped below a certain threshold, indicating a potential problem with the system. Since the question asks when the operation stops if the switch opens, the correct answer is "Anytime during operation." This means that the system can stop functioning at any point, regardless of the percentage of operation completed.

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  • 37. 

    (448) What indicator on the EPU–6/E frequency converter indicates an undervoltage condition?

    • Overvoltage.

    • Out-of-phase.

    • Undervoltage.

    • Fault.

    Correct Answer
    A. Undervoltage.
    Explanation
    The correct answer is "Undervoltage." This means that the indicator on the EPU-6/E frequency converter will show an undervoltage condition. This indicates that the voltage supplied to the converter is below the normal or expected level.

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  • 38. 

    (408) Perform an operational check of the unit

    • At the last minute.

    • With the defective part removed.

    • Before final reassembly of the enclosure.

    • As soon as you replace the defective part.

    Correct Answer
    A. Before final reassembly of the enclosure.
    Explanation
    Performing an operational check of the unit before final reassembly of the enclosure ensures that the unit is functioning properly and all components are working as expected. This step allows any issues or defects to be identified and addressed before the final reassembly, reducing the risk of having to disassemble the enclosure again if a problem is discovered later. It also ensures that the unit is fully tested and ready for use once it is reassembled.

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  • 39. 

    (417) During operation of a turbine engine, fuel and air are mixed and ignited in the

    • Fuel atomizer.

    • Combustor can.

    • Mixer assembly.

    • Plenum chamber.

    Correct Answer
    A. Combustor can.
    Explanation
    During the operation of a turbine engine, fuel and air are mixed and ignited in the combustor can. The combustor can is a component of the engine where combustion takes place. It is designed to provide a controlled environment for the fuel and air mixture to burn efficiently and generate the necessary energy to drive the turbine. The combustor can is typically located between the compressor and the turbine sections of the engine.

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  • 40. 

    (426) The internal current produced by all electromechanical generators is

    • Alternating current (AC).

    • Direct current (DC).

    • Pulsating AC.

    • Pulsating DC.

    Correct Answer
    A. Alternating current (AC).
    Explanation
    Electromechanical generators convert mechanical energy into electrical energy. In these generators, a rotating coil or magnet induces a changing magnetic field, which in turn generates an alternating current (AC) in the wire. AC refers to the current that periodically changes direction, typically at a frequency of 50 or 60 cycles per second. This is in contrast to direct current (DC), which flows in only one direction. Therefore, the correct answer is alternating current (AC) as it accurately describes the internal current produced by electromechanical generators.

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  • 41. 

    (438) After the A/M32A–60A generator set has shut itself down due to low fuel, the fuel level relay, K4, must be reset by

    • Turning the start switch OFF, then ON.

    • Turning the master switch OFF, then ON.

    • De-energizing the low-level lockout relay.

    • De-energizing the low-level warning switch.

    Correct Answer
    A. Turning the master switch OFF, then ON.
    Explanation
    The correct answer is turning the master switch OFF, then ON. This is because the fuel level relay, K4, is connected to the master switch and resetting the master switch will reset the relay. By turning the master switch OFF and then ON, the relay will be reset and the generator set can be restarted.

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  • 42. 

    (410) Which function of a lubricant compensates for microscopic irregularities in the cylinder wall?

    • Cooling.

    • Sealing.

    • Cleaning.

    • Reducing friction.

    Correct Answer
    A. Sealing.
    Explanation
    The function of a lubricant that compensates for microscopic irregularities in the cylinder wall is sealing. When a lubricant is applied to the cylinder wall, it forms a thin film that fills in the tiny gaps and imperfections on the surface. This helps to create a smooth and even surface, reducing the chances of leakage and improving the overall sealing of the cylinder.

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  • 43. 

    (438) In the event of an overspeed condition, what component of the A/M32A–60A generator electrical system stops the engine?

    • Overspeed actuator.

    • Fuel shutoff switch.

    • 35 percent centrifugal switch.

    • 110 percent centrifugal switch.

    Correct Answer
    A. 110 percent centrifugal switch.
    Explanation
    The 110 percent centrifugal switch is the component of the A/M32A-60A generator electrical system that stops the engine in the event of an overspeed condition. When the engine reaches 110 percent of its normal operating speed, the centrifugal switch is triggered and interrupts the electrical circuit, shutting down the engine to prevent further damage or failure.

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  • 44. 

    (440) On the A/M32A–60A generator, what stops battery charging when the batteries are fully charged and prevents discharge when the unit is shut down?

    • Battery charging resistor.

    • Battery charging diode.

    • Voltage regulator.

    • Charging shunt.

    Correct Answer
    A. Battery charging diode.
    Explanation
    The battery charging diode stops battery charging when the batteries are fully charged and prevents discharge when the unit is shut down. A diode is an electronic component that allows current to flow in only one direction. In this case, the diode is placed in the charging circuit and acts as a one-way valve, allowing current to flow from the generator to the batteries for charging but preventing current from flowing back from the batteries to the generator when it is shut down. This ensures that the batteries do not overcharge and that they retain their charge when the generator is not in use.

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  • 45. 

    (444) To stop the A/M32A–86D engine, the engine stop control

    • Opens the magneto circuit.

    • Energizes the shutdown solenoid.

    • De-energizes the engine run/idle circuit.

    • Puts the fuel rack in the NO-FUEL position.

    Correct Answer
    A. Puts the fuel rack in the NO-FUEL position.
    Explanation
    The correct answer is "puts the fuel rack in the NO-FUEL position." When the engine stop control is activated, it moves the fuel rack to the NO-FUEL position, which cuts off the fuel supply to the engine. This effectively stops the engine from running. Opening the magneto circuit or energizing the shutdown solenoid are not the correct actions to stop the engine. De-energizing the engine run/idle circuit would also not directly stop the engine.

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  • 46. 

    (412) The advantage of using a turbocharger on a diesel engine is the fuel consumption is

    • Decreased because of the increased internal operating temperature of the engine.

    • Increased because of the better mixing of the fuel with the air charge.

    • Used more efficiently and horsepower is increased.

    • Used more efficiently and horsepower is decreased.

    Correct Answer
    A. Used more efficiently and horsepower is increased.
    Explanation
    A turbocharger on a diesel engine increases the efficiency of fuel usage by compressing the air intake, allowing more air to enter the engine. This results in better mixing of the fuel with the air charge, leading to more efficient combustion and increased horsepower. Therefore, the fuel is used more efficiently and the horsepower is increased.

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  • 47. 

    (420) The time required to open the load control valve on the turbine engine is controlled by the

    • Mechanical linkage.

    • Actuator diaphragm.

    • Rate adjustment screw.

    • Actuator return spring.

    Correct Answer
    A. Rate adjustment screw.
    Explanation
    The correct answer is the rate adjustment screw. The time required to open the load control valve on the turbine engine is controlled by the rate adjustment screw. This screw is responsible for adjusting the rate at which the valve opens, allowing for precise control of the flow of fuel or air into the engine. By adjusting the rate, the engine can be optimized for different operating conditions, ensuring efficient and reliable performance. The mechanical linkage, actuator diaphragm, and actuator return spring may play a role in the overall operation of the load control valve, but they do not directly control the time required to open it.

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  • 48. 

    (422) Normal acceleration characteristics of the gas turbine compressor (GTC) include

    • Sudden rumbling noises after 35 percent.

    • A decrease in vibration after 35 percent.

    • Smooth and quiet acceleration.

    • Burping.

    Correct Answer
    A. A decrease in vibration after 35 percent.
    Explanation
    The normal acceleration characteristics of a gas turbine compressor (GTC) include a decrease in vibration after 35 percent. This means that as the GTC accelerates, the vibration levels initially increase but then start to decrease after it reaches 35 percent of its acceleration. This decrease in vibration is considered normal and indicates that the GTC is operating smoothly and without any issues.

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  • 49. 

    (438) The A/M32A–60A generator set cannot be loaded either electrically or pneumatically until after the

    • 35 percent switch has closed.

    • 95 percent switch has closed.

    • 110 percent switch has opened.

    • BLEED AIR ON switch is closed.

    Correct Answer
    A. 95 percent switch has closed.
    Explanation
    The correct answer is 95 percent switch has closed. This means that the generator set cannot be loaded electrically or pneumatically until the 95 percent switch has closed. This switch is likely a safety measure to ensure that the generator is operating at a certain level of efficiency before it can be loaded. Once the switch is closed, the generator can be loaded and used for its intended purpose.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

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

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 01, 2017
    Quiz Created by
    Ronnie

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