Age 2A672 (Vol 1)

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  • 1/88 Questions

    (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.
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About This Quiz

The AGE 2A672 (Vol 1) quiz assesses knowledge on atomic structure, focusing on the properties of electrons, atom stability, and electrical principles. It is designed for learners aiming to understand the fundamental aspects of matter and electron behavior in atoms.

Atomic Structure Quizzes & Trivia

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  • 2. 

    (018) 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.

    Correct Answer
    A. Last known source of power.
    Explanation
    When troubleshooting any electrical system, locating the last known source of power can help identify where the problem may have originated. By identifying the last point where power was present, it can narrow down the potential areas where a fault or issue may have occurred. This starting point can save time and effort in troubleshooting the electrical system.

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  • 3. 

    (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 contactor opens and generator output stops.

    • AC supply warning light illuminates.

    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. This means that the electrical circuit between the generator and the load is interrupted, resulting in the generator output stopping. Therefore, both the AC contactor opening and the generator output stopping occur as a result of the AC supply fault.

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  • 4. 

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

    • Field flash the generator.

    • Connect TB4-11 to 14 VDC power source.

    • Check the Field Transformer.

    • 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 appropriate action to take is to field flash the generator. Field flashing involves applying a temporary current to the field windings in order to restore the residual magnetism. This can be done by connecting TB4-11 to a 14 VDC power source, which will provide the necessary current to reestablish the magnetic field in the generator. Checking the field transformer and fault display may be relevant in diagnosing the issue, but field flashing is the specific action required to address the loss of residual magnetism.

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  • 5. 

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

    • Auto/Manual switch S1.

    • Test bank switch S202.

    • Excitation relay K16.

    • Voltage rheostat R61.

    Correct Answer
    A. Voltage rheostat R61.
    Explanation
    The voltage rheostat R61 is used to manually increase the output voltage on an A/M32A-86D generator. A rheostat is a variable resistor that can be adjusted to control the flow of current in a circuit. By increasing the resistance with the voltage rheostat, the output voltage of the generator can be increased. The other options, such as the Auto/Manual switch S1, Test bank switch S202, and Excitation relay K16, do not have the specific function of manually increasing the output voltage.

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  • 6. 

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

    • Compressor shaft.

    • First stage diffuser.

    • Torsion shaft.

    • Second stage impeller.

    Correct Answer
    A. Torsion shaft.
    Explanation
    The torsion shaft is specifically designed to break if the engine locks up. This component is responsible for transmitting torque from the engine to the propeller or rotor. If the engine locks up, it can cause excessive torque and strain on the torsion shaft. By breaking, the torsion shaft prevents further damage to the engine and other components. This safety feature helps protect the engine and prevent catastrophic failure.

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  • 7. 

    (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.

    • Pneumatic thermostat.

    • Torus assembly.

    • Fuel Atomizer.

    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 controls the temperature of the engine by regulating the flow of coolant. If the thermostat is faulty or stuck closed, it can cause the engine to overheat, resulting in high exhaust gas temperatures.

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  • 8. 

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

    • Charged.

    • Stable.

    • Unstable.

    • Complete.

    Correct Answer
    A. Stable.
    Explanation
    An atom with eight electrons in its outermost shell is considered stable because it has achieved a full valence shell, which is the most stable configuration for an atom. The outermost shell, also known as the valence shell, is responsible for the atom's chemical behavior and interactions with other atoms. When the valence shell is complete with eight electrons, the atom is less likely to gain or lose electrons, making it stable and less reactive.

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  • 9. 

    (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 of the semiconductor materials and the doping of the transistor.

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  • 10. 

    (001) What is the simplest form of matter?

    • Mixture.

    • Electrons.

    • Element.

    • Compund.

    Correct Answer
    A. Element.
    Explanation
    The correct answer is Element. An element is the simplest form of matter because it consists of only one type of atom. It cannot be broken down into simpler substances through chemical means. Elements are represented by symbols on the periodic table and there are currently 118 known elements.

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  • 11. 

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

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

    • 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.

    • Excessive current flow in an open circuit; no current flow in a 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 an unintended connection between two points of a circuit with low resistance, causing excessive current flow. Hence, there is excessive current flow in a shorted component.

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  • 12. 

    (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, the control switch S13 should be placed in the GENERATE position in order to move the fuel rack and increase the engine speed to 2,000 RPM.

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  • 13. 

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

    • Area, weight, and state of material.

    • Temperature, weight, and state of material.

    • Area, temperature, and type 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 its area, temperature, and type of material. The resistance of a material is directly proportional to its area, meaning that a larger area will result in higher resistance. Temperature also affects resistance, as an increase in temperature leads to an increase in resistance. Additionally, the type of material plays a role in resistance, as different materials have different resistivities.

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  • 14. 

    (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 discovered by Michael Faraday in the early 19th century and is the basis for the operation of generators and transformers. It explains how electrical energy can be generated by moving a magnet through a coil of wire or by changing the magnetic field within a coil.

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  • 15. 

    (090) 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 allows current to flow in one direction and blocks it in the opposite direction until triggered by a control signal. This makes it suitable for applications where precise control of power flow is required, such as in motor control, lighting control, and power supply circuits. It can handle high current and voltage levels, making it an efficient and reliable choice for switching applications.

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  • 16. 

    (004) What is the basic principle of operation for transformers?

    • Mutual induction.

    • Magnetic induction.

    • Counterelectromotive force.

    • Primary and secondary induction.

    Correct Answer
    A. Mutual induction.
    Explanation
    The basic principle of operation for transformers is mutual induction. This means that when an alternating current flows through the primary coil, it creates a changing magnetic field which induces a voltage in the secondary coil. This voltage can be stepped up or stepped down depending on the ratio of turns in the primary and secondary coils. Mutual induction is the fundamental concept that allows transformers to efficiently transfer electrical energy from one circuit to another.

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  • 17. 

    (006) What statement best describes a diode?

    • Is a three-terminal device.

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

    • Is a five-terminal device.

    • 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 only one direction and blocks it in the opposite direction. This is achieved by the presence of a PN junction, which acts as a one-way valve for electric current. When the diode is forward-biased, it allows current to flow freely, but when it is reverse-biased, it acts as an insulator and prevents current from passing through. Therefore, the statement "Has the ability to conduct in one direction and not the other" accurately describes a diode.

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  • 18. 

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

    • Valence electrons.

    • Orbiting electrons.

    • K shell electrons.

    • The energy is shared equally by all 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. Valence electrons are involved in chemical reactions and bonding with other atoms, which requires energy. Therefore, they have the highest energy compared to the electrons in other shells or energy levels.

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  • 19. 

    (002) In a series-parallel circuit, the series current at I1 = 9 amps; in the two parallel branches, I2 = 5 amps; and the value of I3 is not listed.  Use Ohm's law to find the value of I3 and IT.

    • I3 = 5 amps and IT = 14 amps.

    • I3 = 4 amps and IT = 9 amps.

    • I3 = 4 amps and IT = 18 amps..

    • Not enough information to solve.

    Correct Answer
    A. I3 = 4 amps and IT = 9 amps.
    Explanation
    The given question provides information about the series current (I1 = 9 amps) and the current in one of the parallel branches (I2 = 5 amps). To find the value of I3 and IT, we can use Ohm's law, which states that current (I) is equal to voltage (V) divided by resistance (R). Since the resistance is not provided, we cannot directly calculate the values of I3 and IT. Therefore, the correct answer is "Not enough information to solve."

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  • 20. 

    (010) In order to turn off a silicone-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 silicone-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 off state once it has been triggered. If the current drops below this threshold, the SCR will turn off. The trigger current, on the other hand, is the minimum current required to initially turn on the SCR. Variable current and breakdown current are not relevant to turning off the SCR.

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  • 21. 

    (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). This is because the exciter field voltage is supplied by the transformer (T1) and rectifier (CR26). The transformer steps down the voltage from the main power source, while the rectifier converts the alternating current (AC) into direct current (DC) to supply the exciter field. Therefore, (T1) and rectifier (CR26) are the components responsible for supplying the exciter field voltage in the voltage regulator.

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  • 22. 

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

    • J8, terminal V-X

    • VR1, terminal C-R.

    • J8, terminal D-F

    • 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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  • 23. 

    (020) What condition is sensed by the direct current (DC) card on the B809A generator set?

    • Low fuel.

    • Overtemperature.

    • Under frequency.

    • Overfrequency.

    Correct Answer
    A. Overtemperature.
    Explanation
    The direct current (DC) card on the B809A generator set senses the condition of overtemperature. This means that the card is designed to detect when the temperature of the generator set exceeds a certain threshold. This is an important feature as overheating can lead to damage or malfunction of the generator set, so it is crucial to monitor and address any temperature issues promptly.

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  • 24. 

    (026) What section of the A/M32A-60A gas turbine engine load control valve controls the opening time?

    • Diaphragm.

    • Rate control.

    • Load control.

    • Mechanical linkage.

    Correct Answer
    A. Rate control.
    Explanation
    The correct answer is "Rate control." In a gas turbine engine, the rate control section of the load control valve is responsible for controlling the opening time. This section regulates the speed at which the valve opens, allowing for precise control of the fuel flow and power output of the engine. The rate control mechanism ensures that the load control valve opens at the desired rate, maintaining optimal engine performance.

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  • 25. 

    (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 where P-type material is joined to N-type material in a semiconductor is called the depletion region. This region is formed due to the diffusion of charge carriers from one type of material to the other, creating a region depleted of majority charge carriers. This depletion region acts as a barrier to the flow of current, and it plays a crucial role in the operation of various semiconductor devices such as diodes and transistors.

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  • 26. 

    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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  • 27. 

    (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 correct answer is Magnetic pick-up. A magnetic pick-up is a component of the B809A generator set speed control system that produces a frequency pulse train for engine speed reference. This pulse train is used by the engine speed governor to regulate and control the speed of the generator set. The magnetic pick-up detects the rotation of the engine's flywheel and converts it into electrical signals, which are then used to adjust the fuel supply and maintain the desired engine speed.

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  • 28. 

    (011) If the arrow in a bipolar transistor is pointing away from the base, what type of transistor is it?

    • N-type.

    • P-type.

    • NPN.

    • PNP.

    Correct Answer
    A. NPN.
    Explanation
    If the arrow in a bipolar transistor is pointing away from the base, it indicates that the transistor is an NPN type. In an NPN transistor, the majority charge carriers are negative electrons, and the arrow represents the direction of the conventional current flow. The arrow pointing away from the base signifies that the current flows from the emitter to the base and then to the collector in an NPN transistor.

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  • 29. 

    (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
    Placing S13 in the build up position on an A/M32A-86D at governed speed activates the memory time delay relay. The fact that the undervoltage light comes on suggests that there is a problem with the memory time delay relay. This relay is responsible for controlling the timing of certain functions, and if it is not functioning properly, it can cause the undervoltage light to come on. Therefore, the memory time delay relay is the probable cause of this trouble.

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  • 30. 

    (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 the component on the B809A generator set fuel system that distributes and delivers an accurate amount of fuel to the engine cylinders. It is responsible for pressurizing the fuel and delivering it to the injectors at the correct time and in the correct quantity. The injector pump plays a crucial role in ensuring proper combustion and engine performance.

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  • 31. 

    (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.
  • 32. 

    (001) The electrostatic fields around a positive ion move

    • Inward.

    • Inward, then outward.

    • Outward.

    • Outward, then inward.

    Correct Answer
    A. Outward.
    Explanation
    The correct answer is outward because positive ions have a deficiency of electrons, resulting in an overall positive charge. As a result, the electrostatic field lines around a positive ion move away from the ion, indicating an outward direction. This movement occurs due to the repulsion between like charges, causing the field lines to spread out and move away from the positive ion.

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  • 33. 

    (009) How is a zener diode connected in a circuit to regulate voltage?

    • In parallel to the load.

    • In series with the load.

    • In parallel to the resistor.

    • In series with the resistor.

    Correct Answer
    A. In parallel to the load.
    Explanation
    A zener diode is connected in parallel to the load in a circuit to regulate voltage. When connected in this way, the zener diode acts as a voltage regulator by maintaining a constant voltage across the load, regardless of variations in the input voltage. This is achieved by allowing current to flow through the zener diode when the voltage across the load exceeds the zener voltage, effectively limiting the voltage to the desired level.

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  • 34. 

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

    • Automatic manual switch S1.

    • Voltage regulator VR1.

    • Time delay relay K14.

    • Excitation relay K16.

    Correct Answer
    A. Voltage regulator VR1.
    Explanation
    The voltage regulator VR1 controls the strength of the A/M32A-86D generator exciter field L2. A voltage regulator is responsible for maintaining a constant output voltage level regardless of changes in input voltage or load conditions. In this case, VR1 regulates the voltage supplied to the generator exciter field, which determines the strength of the field. By adjusting the voltage, VR1 controls the strength of the exciter field, ensuring that it is at the desired level for optimal generator performance.

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  • 35. 

    (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
    The step of troubleshooting that is considered the most difficult is analysis. This is because analysis involves examining all the available information, identifying patterns or potential causes of the problem, and making an informed decision on the best course of action to resolve the issue. It requires a deep understanding of the system or equipment being troubleshooted and the ability to critically think and problem solve.

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  • 36. 

    (025) While you are operating the A/M32A-60A generator set, you turn the bleed air switch to ON and the engine speed drops to 98 percent. What is happening in the governor to bring the engine speed up to 100 percent?

    • Spring tension is less than centrifugal force and the flyweights move outward opening the bypass port.

    • Spring tension is less than centrifugal force and the flyweights move outward closing the bypass port.

    • Spring tension is greater than centrifugal force and the flyweights move inward closing the bypass port.

    • Spring tension is greater than centrifugal force and the flyweights move inward opening the opening time?

    Correct Answer
    A. Spring tension is greater than centrifugal force and the flyweights move inward closing the bypass port.
    Explanation
    The correct answer explains that when the bleed air switch is turned on, the engine speed drops to 98 percent. In this situation, the governor needs to bring the engine speed back up to 100 percent. The explanation states that spring tension is greater than centrifugal force, causing the flyweights to move inward. This movement of the flyweights closes the bypass port, which helps increase the engine speed back to 100 percent.

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  • 37. 

    (S30) When an A/M32A-60A generator is started, what component de-energizes at 95 percent?

    • Starter relay.

    • Ignition unit.

    • Ready to load light.

    • Acceleration limiter valve.

    Correct Answer
    A. Ignition unit.
    Explanation
    When an A/M32A-60A generator is started, the component that de-energizes at 95 percent is the ignition unit. This means that the ignition unit stops receiving power or is turned off when the generator reaches 95 percent of its starting process.

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  • 38. 

    (031) Apparent power is measured in

    • Kilovolts (KV).

    • Kilowattts (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 electrical circuit, including both the real power (measured in kilowatts) and the reactive power. It is represented in kilo-volt-amperes (KVA), which takes into account the voltage and current in the circuit. This measurement is important in determining the capacity and sizing of electrical equipment, as it reflects the total power that needs to be supplied or handled by the system.

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  • 39. 

    (033) What is the operating voltage of the blower motor and control relays on an A/M24T-8 load bank?

    • 12 volts direct current (VDC).

    • 28 VDC.

    • 120 volts alternating current (VAC).

    • 208 VAC.

    Correct Answer
    A. 28 VDC.
    Explanation
    The correct answer is 28 VDC. This means that the operating voltage of the blower motor and control relays on an A/M24T-8 load bank is 28 volts direct current.

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  • 40. 

    (008) In a circuit using a bridge rectifier, how many diodes are forward biased during the first cycle of alternating current (AC)?

    • 4.

    • 3.

    • 2.

    • 1.

    Correct Answer
    A. 2.
    Explanation
    In a circuit using a bridge rectifier, there are two diodes that are forward biased during the first cycle of alternating current (AC). The bridge rectifier is a configuration of four diodes that allows the current to flow in one direction by alternating the forward bias of the diodes. During the positive half-cycle of the AC input, two diodes are forward biased and allow the current to flow through them, while the other two diodes are reverse biased and block the current. Therefore, the correct answer is 2.

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  • 41. 

    (013) A metal oxide varistor (MOV) is made up of how many semiconductors?

    • 2.

    • 3.

    • 4.

    • 5.

    Correct Answer
    A. 2.
    Explanation
    A metal oxide varistor (MOV) is made up of two semiconductors. This is because an MOV is a type of voltage-dependent resistor that is used to protect electrical devices from excessive voltage. It is made up of a ceramic material that contains zinc oxide, which acts as a semiconductor. When the voltage across the MOV exceeds its threshold, the zinc oxide conducts and absorbs the excess energy, protecting the connected device. Therefore, the correct answer is 2.

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  • 42. 

    (018) To test the load contactor relay K1, using test probes, in what position must the automatic-manual voltage control switch be placed?

    • AUTOMATIC.

    • MANUAL.

    • TEST.

    • OFF.

    Correct Answer
    A. AUTOMATIC.
    Explanation
    To test the load contactor relay K1, the automatic-manual voltage control switch must be placed in the AUTOMATIC position. This is because the load contactor relay is part of the automatic control system, and by placing the switch in the AUTOMATIC position, the relay will be activated and tested in its normal operating mode. Placing the switch in any other position, such as MANUAL, TEST, or OFF, would not properly test the relay in its intended operating mode.

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  • 43. 

    (009) How is the zener diode connected in a circuit to protect the load?

    • In parallel to the resistor.

    • In series with the load.

    • In parallel to the load.

    • Forward biased.

    Correct Answer
    A. In parallel to the load.
    Explanation
    The zener diode is connected in parallel to the load in order to protect it. When the voltage across the load exceeds the breakdown voltage of the zener diode, it starts conducting and provides a low-resistance path for the excess current to flow through. This prevents the voltage from rising further and protects the load from damage. Connecting the zener diode in parallel ensures that it only conducts when necessary, while allowing the load to operate normally under normal voltage conditions.

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  • 44. 

    (011) The circuit in the bipolar transistor that carries 5 percent of the current flow is the

    • Emitter-collector circuit.

    • Control circuit.

    • Base circuit.

    • Load circuit.

    Correct Answer
    A. Control circuit.
    Explanation
    The control circuit in a bipolar transistor is responsible for regulating the flow of current between the emitter and collector. It acts as a switch, allowing or blocking the flow of current based on the input signal at the base. This circuit plays a crucial role in controlling the amplification and operation of the transistor. The emitter-collector circuit, on the other hand, is the main current-carrying path, while the base circuit provides the input signal. The load circuit is the external circuit connected to the transistor for utilizing its output.

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  • 45. 

    (017) You are driving on the flight line and notice an A/M32A-86D power unit with all the fault lights on. You try to reset S23, but the lights stay on. What is a probable cause of this trouble?

    • S30 is shorted.

    • S23 is stuck open.

    • K17 contacts are closed.

    • K23 contacts are closed.

    Correct Answer
    A. S30 is shorted.
    Explanation
    The probable cause of the trouble is that S30 is shorted. This means that there is a direct connection between the two terminals of S30, causing a fault in the power unit. As a result, the fault lights remain on even after attempting to reset S23.

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  • 46. 

    (020) What signal powers the regulator card output pulse sent to the exciter field of the B809A generator?

    • 28.5 volts direct current (VDC).

    • 110 VDC.

    • 115 volts alternating current (VAC)

    • 200 VAC.

    Correct Answer
    A. 110 VDC.
    Explanation
    The regulator card output pulse sent to the exciter field of the B809A generator is powered by 110 VDC. This voltage is used to control and regulate the excitation of the generator's field, ensuring a stable and consistent output.

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  • 47. 

    (021) Refer to foldout 2. While operating a B809A generator, what switch is closed to provide potential to the exciter field

    • S1, master switch.

    • S5, run/idle toggle switch.

    • S3, interlock toggle switch.

    • PB2, output control pushbutton switch.

    Correct Answer
    A. S5, run/idle toggle switch.
    Explanation
    When operating a B809A generator, the switch that needs to be closed in order to provide potential to the exciter field is the S5, run/idle toggle switch. This switch is responsible for controlling the generator's operation mode, toggling between the run and idle states. By closing this switch, the necessary potential is supplied to the exciter field, allowing the generator to function properly.

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  • 48. 

    (029) Refer to foldout 5. The direct current (DC) voltmeter on an A/M32A-60A fails to indicate during operation. What is the probable cause of this trouble?

    • K6 is defective.

    • TR1 is defective

    • R6 requires adjustment.

    • S4 is in the OFF position.

    Correct Answer
    A. TR1 is defective
    Explanation
    The probable cause of the trouble is that TR1 is defective. This is because TR1 is a component that is responsible for the operation of the DC voltmeter. If TR1 is defective, it can prevent the voltmeter from indicating properly. Therefore, the failure of the voltmeter to indicate during operation can be attributed to the defectiveness of TR1.

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  • 49. 

    (001) The force required to move free electrons through a conductor is known as

    • Current.

    • Negative charge.

    • Voltage.

    • Electrostatic force.

    Correct Answer
    A. Voltage.
    Explanation
    Voltage is the force or potential difference that drives the flow of electrons through a conductor. It is the measure of the energy per unit charge required to move the electrons. Current, on the other hand, refers to the actual flow of electrons. Negative charge and electrostatic force are not accurate terms to describe the force required to move electrons through a conductor.

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Quiz Review Timeline (Updated): Mar 19, 2023 +

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

  • Current Version
  • Mar 19, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 09, 2016
    Quiz Created by
    Lo973k3p
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