2A672 Pre-test Edit Code 06

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  • 1/126 Questions

    When troubleshooting any electrical system, you can locate a starting point by first finding the 

    • Common ground bus.
    • Main circuit breaker.
    • External power source.
    • Last known source of power.
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About This Quiz

The 2A672 PRE-TEST EDIT CODE 06 assesses foundational knowledge in atomic structure, focusing on elements, valence electrons, stability of atoms, conductive properties, and electrostatic principles. It's designed to enhance understanding of physical science concepts.

2A672 Pre-test Edit Code 06 - Quiz

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  • 2. 

    (023) What gas turbine engine component is specifically designed to break if the engine locks up?    

    • Second stage impeller.

    • First stage diffuser.

    • Compressor shaft.

    • Torsion shaft.

    Correct Answer
    A. Torsion shaft.
    Explanation
    The torsion shaft is specifically designed to break if the gas turbine engine locks up. This is because it acts as a safety mechanism to prevent further damage to the engine. If the engine locks up, the torsion shaft will break, allowing the engine to stop rotating and preventing any additional stress or damage to the engine components.

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  • 3. 

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

    • Electrically

    • Hydraulically

    • Pneaumatically

    • By the belt off the engine crank shaft

    Correct Answer
    A. Hydraulically
    Explanation
    The nitrogen booster compressor on the self generating nitrogen servicing cart (SGNSC) operates hydraulically. This means that it uses hydraulic power to compress the nitrogen gas. Hydraulic power is generated by using fluids, such as oil or water, to transmit power from one location to another. In this case, the hydraulic power is used to drive the compressor and compress the nitrogen gas.

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  • 4. 

    (202) What components 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
    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, which is crucial for proper cooling of the converter. If the air inlets are blocked, it can lead to overheating of the converter, causing damage or malfunction. Therefore, ensuring that the air inlets are clear and free from any obstructions is essential for the safe and effective operation of the EPU-6/E frequency converter.

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  • 5. 

    (001) If there are eight electrons in the outer most shell of an atom, then it is considered    

    • Complete

    • Unstable

    • Charged

    • Stable

    Correct Answer
    A. Stable
    Explanation
    If an atom has eight electrons in its outermost shell, it is considered stable. This is because the outermost shell, also known as the valence shell, is complete with the maximum number of electrons it can hold. A complete valence shell indicates that the atom has achieved a full octet, which is a stable electron configuration. Stable atoms are less likely to undergo chemical reactions or form bonds with other atoms.

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  • 6. 

    (003) When voltage is induced into a conductor by a relative motion between the conductor and a magnetic field this principle is known as

    • Magnetism

    • Reluctance

    • Direct current

    • Electromagnetic induction

    Correct Answer
    A. Electromagnetic induction
    Explanation
    Electromagnetic induction is the principle where voltage is induced into a conductor by the relative motion between the conductor and a magnetic field. This phenomenon was first discovered by Michael Faraday in 1831. It is the basis for the operation of generators, transformers, and other electrical devices. When a conductor moves through a magnetic field or when the magnetic field around a conductor changes, an electromotive force (EMF) is induced in the conductor, resulting in the generation of an electric current. This principle is widely used in various applications in electrical engineering.

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  • 7. 

    (006) What statement best describes a diode?

    • Is a five-terminal device.

    • Is a three-terminal device.

    • Has the ability to conduct in one direction and not the other.

    • Has the ability to conduct in all directions when gated or discharged.

    Correct Answer
    A. Has the ability to conduct in one direction and not the other.
    Explanation
    A diode is a two-terminal device that allows current to flow in one direction while blocking it in the opposite direction. This property is known as rectification and is achieved by the presence of a PN junction in the diode. When the diode is forward-biased, it conducts current, but when it is reverse-biased, it acts as an open circuit. This characteristic makes diodes useful in various applications such as rectifiers, voltage regulators, and signal demodulation.

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  • 8. 

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

    • Accelerate air

    • Decrease air velocity

    • Increase air pressure

    • Smooth turbulent air flow

    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 operation. The deswirl ring helps to reduce turbulence and create a more streamlined and efficient flow of air through the compressor. This improves the overall performance and effectiveness of the gas turbine compressor.

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  • 9. 

    (005) If the size of the plates of a capacitor is increased, how is capacitance affected?    

    • Capacitance increases.

    • Capacitance decreases.

    • Electrons are distorted and scattered.

    • Electrostatic force between the plates decreases.

    Correct Answer
    A. Capacitance increases.
    Explanation
    When the size of the plates of a capacitor is increased, the distance between the plates also increases. This results in an increase in the capacitance of the capacitor. Capacitance is directly proportional to the area of the plates and inversely proportional to the distance between them. Therefore, when the size of the plates is increased, the capacitance also increases.

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  • 10. 

    (016) What component on an A/M32A–86D generator is used to manually increase output voltage? 

    • Voltage rheostat R61.

    • Excitation relay K16.

    • Test bank switch S202.

    • Auto/Manual switch S1.

    Correct Answer
    A. Voltage rheostat R61.
    Explanation
    The correct answer is Voltage rheostat R61. A voltage rheostat is a device used to control or vary the voltage in a circuit. In the context of an A/M32A-86D generator, the voltage rheostat R61 is used to manually increase the output voltage. By adjusting the rheostat, the operator can increase or decrease the voltage being generated by the generator. This allows for fine-tuning of the output voltage to meet specific requirements or to compensate for variations in the electrical load.

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  • 11. 

    (022) If you have a loss of residual magnetism in the exciter field poles, what should you do?    

    • Connect TB4–11 to 14 VDC power source.

    • Check the Field Transformer.

    • Field flash the generator.

    • Check the fault display.

    Correct Answer
    A. Field flash the generator.
    Explanation
    If there is a loss of residual magnetism in the exciter field poles, the correct action to take is to field flash the generator. Field flashing is a process that involves applying a temporary voltage to the generator's field winding to restore the residual magnetism. This will help the generator to build up voltage and start producing power again. Connecting TB4-11 to a 14 VDC power source, checking the Field Transformer, and checking the fault display are not appropriate actions for addressing a loss of residual magnetism.

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  • 12. 

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

    • 2426

    • 623

    • 457

    • 55

    Correct Answer
    A. 55
  • 13. 

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

    • Powers the booster compressor.

    • Provides air to the feed air compressor.

    • Provides low pressure air for pneumatic tools.

    • Maintains 130°F air temperature to prevent condensation.

    Correct Answer
    A. Provides low pressure air for pneumatic tools.
    Explanation
    The auxiliary air system on the self generating nitrogen servicing cart (SGNSC) provides low pressure air for pneumatic tools. This means that it supplies air at a lower pressure to power tools that operate using compressed air. This is an important function as it allows the SGNSC to be used for a variety of tasks that require pneumatic tools, such as inflating tires or operating air-powered drills.

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  • 14. 

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

    • Vacuum leaks

    • Inward leaks

    • Outward leaks

    • Pressure leaks

    Correct Answer
    A. Inward leaks
    Explanation
    Inward leaks occur when the pressure within the refrigeration system is less than atmospheric pressure. This means that air or other substances are being drawn into the system, causing a decrease in pressure. Inward leaks can be problematic as they can introduce contaminants into the system and affect its efficiency. It is important to identify and fix inward leaks to maintain the proper functioning of the refrigeration system.

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  • 15. 

    (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.

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

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

    Correct Answer
    A. Nothing; this is normal operation. The blower clutch energizes at governed speed.
  • 16. 

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

    • Set-up controls

    • Set parking brake

    • Open and secure the exhaust door

    • Ensure the turbine air inlet and exhaust outlet are free of combustion

    Correct Answer
    A. Open and secure the exhaust door
    Explanation
    If the exhaust door is not opened and secured, the A/M32A-95 gas turbine compressor will not be able to start. The exhaust door needs to be opened to allow the exhaust gases to escape, and it needs to be secured to ensure that it remains open during operation. If the exhaust door is not opened and secured, the exhaust gases will not be able to flow out properly, which will prevent the compressor from starting.

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  • 17. 

    (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?

    • 28V to aircraft.

    • Neutral.

    • Bypass.

    • Loop.

    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 provide it to the aircraft.

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  • 18. 

    (001) What is the simplest form of matter?    

    • Element

    • Mixture

    • Electrons

    • Compund

    Correct Answer
    A. Element
    Explanation
    An element is the simplest form of matter because it consists of only one type of atom. Elements cannot be broken down into simpler substances by chemical means. They are the building blocks of all other substances and are represented on the periodic table. Examples of elements include hydrogen, oxygen, carbon, and gold.

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  • 19. 

    (001) In an atom, what electrons contain the most energy?    

    • The energy is shared equally by all electrons

    • Orbiting electrons

    • Valence electrons

    • K shell electrons

    Correct Answer
    A. Valence electrons
    Explanation
    Valence electrons contain the most energy in an atom. These are the electrons located in the outermost energy level or shell of an atom. They are involved in chemical reactions and bonding with other atoms. The energy of valence electrons is higher compared to the electrons in inner shells because they are further away from the positively charged nucleus and experience less attraction. This allows valence electrons to participate in chemical reactions and determine the atom's chemical properties.

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  • 20. 

    (002) What are factors that affect the resistance of a material?    

    • Area, weight, and state of material.

    • Area, temperature, and type of material.

    • Temperature, weight, and state of material.

    • Temperature, type of material, and state of material.

    Correct Answer
    A. Area, temperature, and type of material.
    Explanation
    The factors that affect the resistance of a material are the area of the material, the temperature, and the type of material. The area of the material affects resistance because a larger area allows for more current to flow through, resulting in lower resistance. The temperature of the material also affects resistance because as the temperature increases, the resistance of the material also increases. Finally, the type of material affects resistance because different materials have different resistivities, which determine how easily current can flow through them.

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  • 21. 

    (011) What is the major difference between an NPN transistor and a PNP transistor?    

    • A PNP transistor can only be used as a regulator.

    • An NPN transistor can only be used as a switch.

    • Direction of current flow.

    • Number of junctions.

    Correct Answer
    A. Direction of current flow.
    Explanation
    The major difference between an NPN transistor and a PNP transistor is the direction of current flow. In an NPN transistor, the current flows from the collector to the emitter, while in a PNP transistor, the current flows from the emitter to the collector. This difference in current flow direction is due to the arrangement and polarity of the semiconductor materials in the transistor.

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  • 22. 

    (015) During operation of the A/M32A–86D generator set, what position do you place control switch S13 in to move the fuel rack and increase the engine speed to 2,000 revolutions per minute (RPM)?

    • IDLE

    • GENERATE

    • BUILD UP VOLTS

    • AUTO TEST BANK

    Correct Answer
    A. GENERATE
    Explanation
    During operation of the A/M32A-86D generator set, you would place control switch S13 in the "GENERATE" position to move the fuel rack and increase the engine speed to 2,000 RPM.

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  • 23. 

    (016) Refer to foldout 1. Where is the best point to check voltage to the A/M32A–86D generator exciter field? 

    • J8, terminal D-F.

    • J8, terminal V-X.

    • VR1, terminal C-R.

    • Automatic-manual switch S1.

    Correct Answer
    A. J8, terminal D-F.
    Explanation
    The best point to check voltage to the A/M32A-86D generator exciter field is at J8, terminal D-F.

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  • 24. 

    (019) What B809A generator set speed control system component produces a frequency pulse train for engine speed reference?

    • Magnetic pick-up.

    • Engine speed governor.

    • Speed trim potentiometer.

    • Speed control potentiometer.

    Correct Answer
    A. Magnetic pick-up.
    Explanation
    The magnetic pick-up is a component of the B809A generator set speed control system that produces a frequency pulse train for engine speed reference. It is responsible for sensing the rotation of the engine and generating electrical pulses that correspond to the engine speed. These pulses are then used by the speed control system to adjust the fuel supply and maintain the desired engine speed. The other options, such as the engine speed governor, speed trim potentiometer, and speed control potentiometer, are not directly involved in generating the frequency pulse train for engine speed reference.

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  • 25. 

    (020) What action occurs when the B809A generator set alternating current (AC) card senses an AC supply fault?

    • Only generator output stops.

    • Only the AC contactor opens.

    • AC supply warning light illuminates.

    • AC contactor opens and generator output stops.

    Correct Answer
    A. AC contactor opens and generator output stops.
    Explanation
    When the B809A generator set alternating current (AC) card senses an AC supply fault, the AC contactor opens and the generator output stops. This means that the connection between the generator and the AC supply is interrupted, preventing any further generation of alternating current.

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  • 26. 

    (023) During the operation of a A/M32A–60A generator set, you noticed the exhaust gas temperature is excessively high. What is the probable cause of this trouble?

    • Air oil seals.

    • Fuel Atomizer.

    • Torus assembly.

    • Pneumatic thermostat.

    Correct Answer
    A. Pneumatic thermostat.
    Explanation
    The probable cause of the excessively high exhaust gas temperature in the A/M32A-60A generator set is the pneumatic thermostat. The pneumatic thermostat is responsible for regulating the temperature of the engine coolant, and if it is malfunctioning or not functioning properly, it can cause the engine to overheat, leading to high exhaust gas temperatures.

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  • 27. 

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

    • ASM1, ASM2

    • CYL1, CYL2

    • FCV1, FCV2

    • PS1, TS4, TS5

    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. These components are responsible for the nitrogen generation process, where they separate nitrogen gas from the surrounding air. The nitrogen gas is then used for various purposes such as aircraft tire inflation, pneumatic system testing, and other nitrogen-dependent operations.

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  • 28. 

    (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. They have the expertise and knowledge to assess the condition of the equipment and evaluate the cost and benefits of repairing it. They consider factors such as the cost of repairs, the expected lifespan of the equipment after repair, and the availability of spare parts. Based on their analysis, they can determine whether it is more cost-effective to repair the equipment or replace it.

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  • 29. 

    (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
    After an aerospace ground equipment (AGE) unit is overhauled, it is considered to be 2 years old at the completion of the overhaul.

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  • 30. 

    (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 a decrease in pressure and temperature. This leads to the formation of frost on the affected area. Therefore, the presence of frosting indicates that there is a blockage in the refrigeration system.

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  • 31. 

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

    • Torus assembly

    • Combustor can

    • Combustor cap

    • Plenum

    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.

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  • 32. 

    (010) What is the primary use of a silicon-controlled rectifier (SCR)?    

    • Electronic switch.

    • Voltage regulator.

    • Circuit amplifier.

    • Spike protector.

    Correct Answer
    A. Electronic switch.
    Explanation
    A silicon-controlled rectifier (SCR) is primarily used as an electronic switch. It is a semiconductor device that can control the flow of electric current in a circuit. When a small current is applied to the gate terminal of the SCR, it allows a larger current to flow through the main terminals, acting as a switch that can turn on and off the current flow. SCR switches are commonly used in applications such as motor control, power supplies, and lighting control.

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  • 33. 

    (014) The portion of the voltage regulator that supplies exciter field voltage is transformer    

    • (T1) and rectifier (B3)

    • (T3) and rectifier (B2).

    • (T2) and rectifier (B1).

    • (T1) and rectifier (CR26).

    Correct Answer
    A. (T1) and rectifier (CR26).
    Explanation
    The correct answer is (T1) and rectifier (CR26). The exciter field voltage is supplied by the transformer (T1) and rectifier (CR26) in the voltage regulator. The transformer steps down the input voltage to the desired level for the exciter field, and the rectifier converts the AC voltage from the transformer into DC voltage. This combination of transformer and rectifier ensures that the exciter field receives the appropriate voltage for proper operation.

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  • 34. 

    (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

    • Programmable logic controller (PLC) circuit

    • Directional control valve cycling control relay

    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 is responsible for controlling and regulating the operations of various components in the SGNSC, including the nitrogen booster compressor. It receives input signals from sensors and other devices, processes them according to a pre-programmed logic, and sends output signals to control the speed of the compressor. By adjusting the speed of the compressor, the PLC circuit ensures that the nitrogen generation and delivery process is efficient and meets the required specifications.

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  • 35. 

    (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 switch

    • 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 the oil pressure is low. This switch is designed to detect the oil pressure and if it falls below a certain threshold, it sends a signal to the engine control system to prevent the engine from starting or running. This is important because low oil pressure can indicate a lack of lubrication, which can lead to engine damage or failure if the engine is allowed to operate.

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  • 36. 

    (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 seals

    • Impellers

    • Inducers

    Correct Answer
    A. Interstage seals
    Explanation
    Interstage seals are components on an A/M32A-95 gas turbine compressor that isolate the second stage air from the operation of the first stage compressor. These seals prevent air leakage and maintain the separation between the two stages of the compressor, ensuring efficient and effective operation.

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  • 37. 

    (013) What are the three leads in a unijunction transistor (UJT) called?    

    • Anode, cathode, and gate.

    • Emitter, base 1, and base 2.

    • Emitter, collector, and base.

    • Common emitter, common collector, and common base.

    Correct Answer
    A. Emitter, base 1, and base 2.
    Explanation
    The three leads in a unijunction transistor (UJT) are called emitter, base 1, and base 2.

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  • 38. 

    (018) Which step of troubleshooting is considered the most difficult?    

    • Recognition and verification.

    • Isolation and elimination.

    • Repair and check.

    • Analysis.

    Correct Answer
    A. Analysis.
    Explanation
    Analysis is considered the most difficult step of troubleshooting because it involves thoroughly examining the problem, gathering information, and identifying the root cause. This step requires critical thinking, problem-solving skills, and technical knowledge to effectively analyze the situation and determine the best course of action. It often involves complex systems and multiple variables, making it challenging to accurately diagnose and resolve the issue.

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  • 39. 

    (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

    • Oil Pressure

    • Fuel pressure

    • Spring tension

    • Plenum air pressure

    Correct Answer
    A. Spring tension
    Explanation
    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 spring tension. The spring tension provides the necessary force to regulate the opening and closing of the poppet valve, while the control air pressure assists in controlling the fuel flow. This combination of spring tension and control air pressure ensures that the fuel flow to the atomizer is properly controlled, allowing for efficient and safe operation of the gas turbine compressor.

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  • 40. 

    (002) What is the difference between an open and a short?

    • An open causes resistance to decrease; a short causes resistance to increase.

    • Excessive current flow in an open circuit; no current flow in a shorted component.

    • No current flow in an open circuit; excessive current flow in a shorted component.

    • Minimum voltage development across the open component; maximum voltage development across the shorted component.

    Correct Answer
    A. No current flow in an open circuit; excessive current flow in a shorted component.
    Explanation
    An open circuit refers to a break or discontinuity in the circuit, which prevents the flow of current. Therefore, there is no current flow in an open circuit. On the other hand, a short circuit occurs when there is a direct connection between two points in the circuit with very low resistance. This results in excessive current flow as the current takes the path of least resistance. Hence, the correct answer states that there is no current flow in an open circuit, while there is excessive current flow in a shorted component.

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  • 41. 

    (016) What component controls the strength of the A/M32A–86D generator exciter field L2?    

    • Excitation relay K16.

    • Time delay relay K14.

    • Voltage regulator VR1.

    • Automatic manual switch S1.

    Correct Answer
    A. Voltage regulator VR1.
    Explanation
    The component that controls the strength of the A/M32A-86D generator exciter field L2 is the voltage regulator VR1. The voltage regulator is responsible for regulating the output voltage of the generator. By adjusting the exciter field, it controls the strength of the field and ensures that the generator produces the desired voltage.

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  • 42. 

    (016) An A/M32A–86D is operating and the alternating current (AC) voltmeter is reading 200 volts alternating current (VAC) on all three phases. What do you do?

    • Adjust VR1.

    • Adjust R61

    • Adjust VR1 or R61

    • Switch S15 to the L-N position.

    Correct Answer
    A. Switch S15 to the L-N position.
    Explanation
    Switch S15 to the L-N position. This answer suggests that in order to address the issue of the AC voltmeter reading 200 volts AC on all three phases, the appropriate action to take is to switch S15 to the L-N position. This switch position likely changes the configuration of the voltmeter to measure the voltage between the line and neutral, rather than between the three phases. This adjustment should result in a more accurate reading.

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  • 43. 

    (010) In order to turn off a silicon-controlled rectifier (SCR), the current must drop below the    

    • Trigger current.

    • Holding current.

    • Variable current.

    • Breakdown current.

    Correct Answer
    A. Holding current.
    Explanation
    When turning off a silicon-controlled rectifier (SCR), the current must drop below the holding current. The holding current is the minimum current required to keep the SCR in the "on" state. If the current drops below this threshold, the SCR will turn off and stop conducting. The holding current is an important parameter to consider when designing circuits using SCRs, as it determines the stability of the device and its ability to maintain the "off" state.

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  • 44. 

    (019) What component on the B809A generator set fuel system distributes and delivers an accurate amount of fuel to the engine cylinders?

    • Injector pump.

    • Transfer pump.

    • Injector nozzles.

    • Throttle actuator.

    Correct Answer
    A. Injector pump.
    Explanation
    The injector pump is responsible for distributing and delivering an accurate amount of fuel to the engine cylinders. It ensures that the right amount of fuel is injected into each cylinder at the correct time, allowing for efficient combustion and optimal engine performance. The transfer pump, on the other hand, is responsible for transferring fuel from the fuel tank to the injector pump. Injector nozzles are the components that actually spray the fuel into the combustion chamber, while the throttle actuator controls the throttle valve to regulate the engine's speed.

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  • 45. 

    (031) Apparent power is measured in    

    • Kilovolts (KV).

    • Kilowatts (KW).

    • Kilo-volt-amperes (KVA).

    • Kilo-watt-amperes (KWA).

    Correct Answer
    A. Kilo-volt-amperes (KVA).
    Explanation
    Apparent power is a measure of the total power in an AC circuit, taking into account both the real power (measured in kilowatts) and the reactive power. It is calculated by multiplying the voltage (measured in kilovolts) by the current (measured in amperes). Therefore, the correct unit for apparent power is kilo-volt-amperes (KVA), as it represents the product of kilovolts and amperes.

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  • 46. 

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

    • DAILY

    • ANNUALLY

    • PRIOR TO USE

    • SEMIANNUALLY

    Correct Answer
    A. SEMIANNUALLY
    Explanation
    The input and output terminals of the EPU-6/E are inspected at a minimum interval of six months or twice a year. This ensures that any potential issues or faults with the terminals are identified and addressed in a timely manner, reducing the risk of malfunction or damage to the equipment. Regular inspections also help to maintain the efficiency and reliability of the EPU-6/E, ensuring that it continues to function properly and meet the required standards.

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  • 47. 

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

    • MAJCOM HQ

    • Item manager

    • Equipment specialist

    • 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.

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  • 48. 

    (007) The area of a semiconductor where P-type material is joined to N-type material is known as    

    • Dielectric region.

    • Depletion region.

    • Depletion field.

    • PN region

    Correct Answer
    A. Depletion region.
    Explanation
    The area of a semiconductor where P-type material is joined to N-type material is known as the depletion region. In this region, the majority carriers from both types of materials recombine, creating a region depleted of free charge carriers. This depletion region acts as a barrier to the flow of current, creating a potential barrier. When a voltage is applied across the P-N junction, the depletion region width changes, allowing or blocking the flow of current.

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  • 49. 

    (017) While operating an A/M32A–86D at governed speed, you place S13 in the build up position and the undervoltage light comes on. What is a probable cause of this trouble?

    • Voltage regulator.

    • Plug interlock relay.

    • Memory time delay relay.

    • Overvoltage/undervoltage relay.

    Correct Answer
    A. Memory time delay relay.
    Explanation
    The probable cause of the undervoltage light coming on when placing S13 in the build up position while operating an A/M32A-86D at governed speed is the memory time delay relay. This relay is responsible for controlling the timing of various functions in the equipment, including the build up process. If the relay is faulty or malfunctioning, it can interrupt the build up process and cause the undervoltage light to come on.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

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

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 04, 2014
    Quiz Created by
    Delgadoi
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