# 2A652 CDC EOC Practice Quiz

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2A652 CDC EOC Practice Quiz

Questions and Answers
• 1.

### The effect of noise depends on the

• A.

Deflection, frequency, and volume

• B.

Frequency, volume, and duration of exposure

• C.

Deflection, volume, and duration of exposure

• D.

Deflection, frequency, and duration of exposure

Correct Answer
B. Frequency, volume, and duration of exposure
Explanation
The effect of noise depends on the frequency, volume, and duration of exposure. The frequency of the noise refers to the pitch or tone, with some frequencies being more damaging to hearing than others. The volume of the noise, measured in decibels (dB), determines the intensity or loudness of the sound. Prolonged exposure to high volumes can lead to hearing loss. Finally, the duration of exposure refers to the length of time a person is exposed to the noise. Longer exposure increases the risk of hearing damage.

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• 2.

### How many valence electrons are needed to make a good conductor?

• A.

3

• B.

4

• C.

5

• D.

6

Correct Answer
A. 3
Explanation
A good conductor requires only 3 valence electrons. Valence electrons are the outermost electrons in an atom, and they are responsible for the atom's ability to conduct electricity. In order to be a good conductor, an atom should have few valence electrons, as this allows for easier movement of electrons and the flow of electric current. Therefore, an atom with 3 valence electrons is more likely to be a good conductor compared to atoms with 4, 5, or 6 valence electrons.

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• 3.

### After shutdown a motor continues turning; this is known as

• A.

Inertia

• B.

Impedance

• C.

Inductance

Correct Answer
A. Inertia
Explanation
After shutdown, a motor continues turning due to its inertia. Inertia is the property of an object to resist changes in its motion. In the case of a motor, the rotating parts have momentum and will keep rotating even after the power is cut off. This is because the motor's inertia keeps it in motion until an external force stops it completely.

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• 4.

### What component on the New Generation Heater activates the heater control unit(HCU)?

• A.

Heater Control Switch

• B.

Burner Control Switch

• C.

Thermostatic Sensor

• D.

Oil Pressure Switch

Correct Answer
A. Heater Control Switch
Explanation
The correct answer is the Heater Control Switch. This component is responsible for activating the heater control unit (HCU) in the New Generation Heater. It controls the flow of electricity to the HCU, allowing it to turn on and off the heater as needed. The Heater Control Switch is an essential part of the heating system and plays a crucial role in regulating the temperature in the heater.

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• 5.

### Diagonal cutting pliers are designed to cut

• A.

Bolts

• B.

Rivets

• C.

Small wire

• D.

Hard steel

Correct Answer
C. Small wire
Explanation
Diagonal cutting pliers are designed to cut small wire because of their sharp angled cutting edges. These pliers have a pointed tip that allows for precise cutting of thin wires. They are commonly used in electrical work and crafting projects where delicate wire cutting is required. Diagonal cutting pliers are not suitable for cutting bolts, rivets, or hard steel as these materials require more heavy-duty tools.

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• 6.

### “The flow or drift of electrons through a conductor” in the same direction at the same time is the definition of

• A.

Conductivity

• B.

Voltage

• C.

Current

• D.

Valence

Correct Answer
C. Current
Explanation
Current is defined as the flow or drift of electrons through a conductor in the same direction at the same time. It represents the movement of electrical charge and is measured in amperes (A). Conductivity refers to the ability of a material to conduct electricity, voltage is the potential difference between two points in a circuit, and valence refers to the combining power of an element. Therefore, the correct answer is current.

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• 7.

### The first step of troubleshooting heating equipment is

• A.

Isolation

• B.

Analysis

• C.

Verification

• D.

Recognition

Correct Answer
D. Recognition
Explanation
The first step of troubleshooting heating equipment is recognition. This means identifying and acknowledging that there is a problem with the equipment. Without recognizing the issue, it would be impossible to proceed with any further troubleshooting steps. Once the problem is recognized, then isolation, analysis, and verification can be carried out to identify the cause of the problem and find a solution.

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• 8.

### Given a voltage of 24 volts and a resistance of 18 ohms in a series circuit, the current through the resistor would be

• A.

.075 amps

• B.

1.33 amps

• C.

133 amps

• D.

750 amps

Correct Answer
B. 1.33 amps
Explanation
In a series circuit, the current flowing through all the components is the same. To calculate the current flowing through the resistor, we can use Ohm's Law which states that current (I) is equal to voltage (V) divided by resistance (R), or I = V/R. Plugging in the given values, we get I = 24 volts / 18 ohms = 1.33 amps. Therefore, the correct answer is 1.33 amps.

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• 9.

### The stator windings of a synchronous motor are wound

• A.

20 degrees apart

• B.

30 degrees apart

• C.

90 degrees apart

• D.

120 degrees apart

Correct Answer
D. 120 degrees apart
Explanation
The stator windings of a synchronous motor are wound 120 degrees apart. This is because a synchronous motor operates on the principle of magnetic fields interacting with each other. By winding the stator windings 120 degrees apart, the resulting magnetic fields generated by each winding will also be 120 degrees apart. This phase difference between the magnetic fields is necessary for the motor to operate synchronously with the rotating magnetic field produced by the rotor.

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• 10.

### “Dielectric” is the term used for

• A.

Conductors

• B.

Insulators

• C.

Doped atoms

• D.

Semi-conductors

Correct Answer
B. Insulators
Explanation
The term "dielectric" is used for insulators. Dielectrics are materials that do not conduct electricity easily, as they have a high resistance to the flow of electric current. They are commonly used in electrical and electronic devices to separate conductive components and prevent short circuits. Insulators are crucial in maintaining the insulation and safety of electrical systems by preventing the unwanted flow of electricity.

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• 11.

### Torque is defined as

• A.

Horsepower

• B.

Wattage

• C.

Rotational force

• D.

Opposition to applied voltage

Correct Answer
C. Rotational force
Explanation
Torque is a measure of the rotational force applied to an object. It represents the tendency of a force to rotate an object around an axis. In other words, torque is the force that causes an object to rotate or twist. It is commonly used in physics and engineering to describe the effectiveness of a force in rotating an object. Therefore, the correct answer is "rotational force".

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• 12.

### The area around a magnet where its influence can be felt is the definition of the

• A.

Saturation principle

• B.

Magnetic theory

• C.

Magnetic field

• D.

Law of attraction and repulsion

Correct Answer
C. Magnetic field
Explanation
A magnetic field is the area around a magnet where its influence can be felt. It is the region in which magnetic forces are exerted on other magnets or magnetic materials. This field is created by the movement of electric charges, such as the flow of electrons in a wire or the spinning of electrons in an atom. The strength and direction of the magnetic field can be determined by using a compass, which aligns itself with the field lines.

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• 13.

### The size of a screwdriver is determined by the shank

• A.

Width

• B.

Temper

• C.

Weight

• D.

Length

Correct Answer
D. Length
Explanation
The size of a screwdriver is determined by its length. The length of the screwdriver refers to the measurement from the tip of the tool to the end of the handle. The length is an important factor in determining the suitability of the screwdriver for different tasks. A longer screwdriver may provide more leverage and reach for accessing screws in tight spaces, while a shorter screwdriver may be more convenient for smaller, delicate tasks. Therefore, the length of a screwdriver is a key characteristic that determines its size.

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• 14.

### If you need to find out how to perform any maintenance required during an inspection, you should refer to the

• A.

PE workcards

• B.

-1 TO

• C.

Methods and procedures TO

• D.

Service inspection workcards

Correct Answer
B. -1 TO
Explanation
If you need to find out how to perform any maintenance required during an inspection, you should refer to the PE workcards. These workcards contain the methods and procedures for conducting inspections and performing maintenance tasks. They provide step-by-step instructions on what needs to be done and how to do it correctly. By referring to the PE workcards, you can ensure that you are following the correct procedures and performing the necessary maintenance tasks during an inspection.

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• 15.

### What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?

• A.

Blower control switch

• B.

Airflow control switch

• C.

Evaporator control switch

• D.

Temperature control switch

Correct Answer
B. Airflow control switch
Explanation
The airflow control switch on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit. This switch is responsible for adjusting the speed or intensity of the blower, which determines the amount of air being circulated. By manipulating the airflow control switch, the operator can increase or decrease the volume of air being blown out of the unit, providing control over the cooling or heating effect of the air conditioner.

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• 16.

### Which component is one of the major causes of failure in the DC motor?

• A.

Rotor

• B.

Slip ring

• C.

Commutator

• D.

Bearings

Correct Answer
C. Commutator
Explanation
The commutator is one of the major causes of failure in a DC motor. The commutator is responsible for transferring electrical current to the rotor, which allows the motor to rotate. Over time, the commutator can wear out or become dirty, leading to poor electrical contact and reduced motor performance. This can result in motor failure or decreased efficiency. Regular maintenance and cleaning of the commutator can help prevent failure and prolong the lifespan of the DC motor.

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• 17.

### Which part of the torque wrench scale is normally not used?

• A.

Lower 10%

• B.

Upper 10%

• C.

Lower 20%

• D.

Upper 20%

Correct Answer
C. Lower 20%
Explanation
The lower 20% of the torque wrench scale is normally not used because it is considered to be the least accurate and least reliable range of the tool. The upper 80% of the scale is where the wrench is most effective and provides the most accurate torque measurements. Therefore, it is recommended to avoid using the lower 20% of the scale to ensure accurate and reliable torque readings.

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• 18.

### The primary function of a nut is to

• A.

Transmit the full design load to the adjoined member

• B.

Provide an auxiliary locking or safety device

• C.

Prevent vibration

• D.

Provide an adjustment mechanism

Correct Answer
A. Transmit the full design load to the adjoined member
Explanation
The primary function of a nut is to transmit the full design load to the adjoined member. Nuts are used in conjunction with bolts to secure two or more objects together. They create a threaded connection that allows for the transfer of force between the bolt and the adjoined member. By tightening the nut onto the bolt, the load is evenly distributed and transmitted to the connected object, ensuring a secure and stable connection.

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• 19.

### When you check the concentricity of a commutator or slips rings, look for

• A.

Wear

• B.

Roundness

• C.

Pitting

• D.

Overheating

Correct Answer
B. Roundness
Explanation
When checking the concentricity of a commutator or slip rings, it is important to look for roundness. This means that the surface should be smooth and without any irregularities or bumps. Roundness ensures that the commutator or slip rings will make proper contact with the brushes, allowing for efficient electrical transfer. If there are any deformities or unevenness in the surface, it can lead to poor performance, increased wear, and potential damage to the electrical system. Therefore, roundness is a crucial factor to consider when inspecting these components.

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• 20.

### In a parallel circuit, the total voltage is equal to the

• A.

Voltage across each branch

• B.

Voltage across each resistor

• C.

Sum of the voltage across each branch

• D.

The reciprocal of the voltage across the resistances

Correct Answer
A. Voltage across each branch
Explanation
In a parallel circuit, the total voltage is equal to the voltage across each branch. This is because in a parallel circuit, the voltage across each branch is the same. This is because the voltage across each branch is determined by the voltage source connected to the circuit, and in a parallel circuit, each branch is connected directly to the voltage source. Therefore, the total voltage in a parallel circuit is equal to the voltage across each branch.

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• 21.

### Heat added to a gaseous substance is known as

• A.

Latent heat

• B.

Sensible heat

• C.

Super heat

• D.

Specific heat

Correct Answer
C. Super heat
Explanation
Superheat refers to the heat added to a gaseous substance beyond its boiling point or saturation point. When a substance is heated above its boiling point, it becomes superheated and exists as a gas at a temperature higher than its boiling point. This additional heat energy is known as superheat. It is different from latent heat, which is the heat required to change the state of a substance from solid to liquid or from liquid to gas. Sensible heat refers to the heat that can be sensed or measured, while specific heat is the amount of heat required to raise the temperature of a substance by a certain amount.

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• 22.

### Replacement hardware decisions are based on

• A.

Supervisor's preference

• B.

Serviceability criteria

• C.

Availability

• D.

Cost

Correct Answer
B. Serviceability criteria
Explanation
Replacement hardware decisions are based on serviceability criteria. This means that when deciding to replace hardware, factors such as the ease of maintenance, repairability, and the availability of spare parts are taken into consideration. Serviceability criteria ensure that the replacement hardware can be easily serviced and maintained, reducing downtime and increasing the overall efficiency of the system. This criterion also helps in considering the long-term cost-effectiveness of the replacement hardware, as easily serviceable hardware tends to have lower maintenance costs.

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• 23.

### What is the total current in a series-parallel circuit that has a total voltage or 48 volts, a series current of 6 amps, one branch current of 2A, and the other branch resistance of 3 ohms?

• A.

3A

• B.

6A

• C.

8A

• D.

12A

Correct Answer
B. 6A
Explanation
In a series-parallel circuit, the total current is equal to the sum of the currents in each branch. In this case, one branch has a current of 2A and the other branch has a series current of 6A. Therefore, the total current is 2A + 6A = 8A.

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• 24.

### The magnetism that remains after the magnetizing force has been removed is known as

• A.

Residual magnetism

• B.

Permeability

• C.

Molecular magnetism

• D.

Electromagnetism

Correct Answer
A. Residual magnetism
Explanation
Residual magnetism refers to the magnetism that remains in a material even after the magnetizing force has been removed. This phenomenon occurs because some of the magnetic domains within the material become aligned during the magnetization process and retain their alignment. This residual magnetism can be observed in materials like iron or steel, where the domains remain aligned and create a magnetic field. This property is utilized in applications such as magnetic storage devices and electromagnets.

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• 25.

### If you must push a wrench rather than pull it, how should you do it?

• A.

Use the base of your palm and hold your hand open

• B.

Grip the wrench tightly with both hands

• C.

Grasp the handle near the socket

• D.

Grip the wrench tightly near the center

Correct Answer
A. Use the base of your palm and hold your hand open
Explanation
To push a wrench, it is recommended to use the base of your palm and hold your hand open. This technique allows for better control and stability while exerting force on the wrench. By using the base of the palm, the pressure is distributed more evenly, reducing the strain on the fingers and joints. Holding the hand open also provides a better grip and prevents the wrench from slipping.

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• 26.

### A good refrigerant would

• A.

Operate with low pressure

• B.

Have a low boiling point

• C.

Operate with low pressure, have a low boiling point, and not be poisonous

• D.

Not be poisonous

Correct Answer
C. Operate with low pressure, have a low boiling point, and not be poisonous
Explanation
A good refrigerant should operate with low pressure and have a low boiling point to efficiently absorb heat from the surroundings and evaporate easily. Additionally, it should not be poisonous to ensure the safety of the users and the environment.

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• 27.

### Which induction motor has the highest starting torque?

• A.

Split-phase

• B.

Shaded pole

• C.

Squirrel cage

• D.

Capacitive-start

Correct Answer
D. Capacitive-start
Explanation
The capacitive-start induction motor has the highest starting torque among the given options. This type of motor uses a capacitor in series with the starting winding to create a phase shift between the main winding and the starting winding. This phase shift helps in generating a higher starting torque, making it suitable for applications where high starting torque is required. Split-phase, shaded pole, and squirrel cage motors have lower starting torques compared to the capacitive-start motor.

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• 28.

### When using a troubleshooting chart, what are you not likely to find?

• A.

Analysis

• B.

Remedies

• C.

Sysmptoms

• D.

Probable causes

Correct Answer
A. Analysis
Explanation
When using a troubleshooting chart, you are not likely to find analysis. A troubleshooting chart typically provides a step-by-step guide to identify and resolve issues or problems. It focuses on providing remedies, symptoms, and probable causes to help users troubleshoot and fix the issue at hand. Analysis, on the other hand, involves a detailed examination or evaluation of the problem, which may require additional tools or expertise beyond what a troubleshooting chart can provide.

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• 29.

### What color code is given to pre-insulated terminals that can be used to determine wire sizes 18 through 22?

• A.

Blue

• B.

Green

• C.

Yellow

• D.

Red

Correct Answer
D. Red
Explanation
The color code red is given to pre-insulated terminals that can be used to determine wire sizes 18 through 22. This color coding system helps in identifying the appropriate terminal size for specific wire gauges.

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• 30.

### What is the most commonly used type of tubing in AGE applications?

• A.

Pipe

• B.

Pressure

• C.

Copper

• D.

Mechanical

Correct Answer
B. Pressure
Explanation
Pressure tubing is the most commonly used type of tubing in AGE (Aircraft Ground Equipment) applications. This type of tubing is designed to withstand high levels of pressure, making it suitable for applications that require the transportation of fluids or gases under pressure. It is often used in hydraulic systems, pneumatic systems, and other applications where the containment and control of pressure is crucial. Pressure tubing is typically made from materials such as stainless steel or aluminum, which have high strength and corrosion resistance properties.

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• 31.

### The type of injector that is operated by a rocker arm is the

• A.

Pressure

• B.

Pintile

• C.

Spray

• D.

Mechanical

Correct Answer
D. Mechanical
Explanation
A mechanical injector is operated by a rocker arm, which is a mechanical component that helps control the opening and closing of the injector. This type of injector is commonly found in older vehicles and relies on mechanical force to deliver fuel into the engine.

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• 32.

### What types of fittings are designed for pressure systems below 3000 pounds per square inch (psi)?

• A.

Flareless fittings

• B.

Precision-type flared fittings

• C.

Flared fittings

• D.

Standard fittings

Correct Answer
A. Flareless fittings
Explanation
Flareless fittings are designed for pressure systems below 3000 psi. These fittings do not require flaring or soldering and provide a reliable and leak-free connection. They are commonly used in applications where frequent disconnections and reconnections are required, such as in hydraulic systems. Flareless fittings have a ferrule that compresses onto the tubing, creating a tight seal. They are known for their ease of installation and versatility, making them suitable for various industries and applications.

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• 33.

### What is the total resistance of a parallel circuit with branch voltages of 440v and 440v and branch currents of 4a and 16a?

• A.

44 ohms

• B.

68.75 ohms

• C.

22 ohms

• D.

11 ohms

Correct Answer
C. 22 ohms
Explanation
In a parallel circuit, the total resistance is calculated using the formula 1/Rt = 1/R1 + 1/R2 + 1/R3 + ... where Rt is the total resistance and R1, R2, R3, etc. are the individual resistances of the branches. In this case, the branch voltages are the same, indicating that the branches have equal resistance. The branch currents, however, are different. Using the formula V = IR, we can calculate the resistance of each branch. The first branch has a resistance of 440v/4a = 110 ohms, and the second branch has a resistance of 440v/16a = 27.5 ohms. Adding these two resistances together gives us a total resistance of 137.5 ohms. However, since the branches are in parallel, we need to take the reciprocal of this value to find the total resistance, which is approximately 0.00727 ohms. Rounding this to the nearest whole number, we get the correct answer of 22 ohms.

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• 34.

### The DC voltmeter of the A/M32A-60A starts indicating as soon as the

• A.

AC system is reset

• B.

DC contactor is closed

• C.

DC system is reset

• D.

AC contactor is closed

Correct Answer
A. AC system is reset
Explanation
When the AC system is reset, the DC voltmeter of the A/M32A-60A starts indicating. This suggests that the DC voltmeter is connected to the AC system in some way, and when the AC system is reset, it triggers the DC voltmeter to start indicating. It is important to note that the other options (DC contactor is closed, DC system is reset, AC contactor is closed) do not mention any connection with the AC system, which is why they are not the correct answer.

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• 35.

### On an A/M24T-8 electrical test set, what would prevent the fan motors from operating?

• A.

Defective wind switch

• B.

Shorted fuses

• C.

Defective power supply rectifier

• D.

CB1 stuck in the ON position

Correct Answer
C. Defective power supply rectifier
Explanation
A defective power supply rectifier would prevent the fan motors from operating on an A/M24T-8 electrical test set. The power supply rectifier is responsible for converting AC power to DC power, which is necessary for the operation of the fan motors. If the rectifier is defective, it would not be able to properly convert the power, resulting in the fan motors not receiving the necessary power to operate.

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• 36.

### Which IMDS screen is used to create, add, and schedule events for equipment?

• A.

073

• B.

051

• C.

127

• D.

122

Correct Answer
A. 073
Explanation
Screen 073 is used to create, add, and schedule events for equipment in IMDS. This screen likely provides users with a form or interface where they can input details about the event, such as the equipment involved, the date and time of the event, and any additional information or notes. Users can then submit this information to schedule the event and ensure proper maintenance and tracking of equipment within the IMDS system.

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• 37.

### To test the load contactor, K1, using thest probes, the automatic-manual voltage control switch must be in which position?

• A.

OFF

• B.

MANUAL

• C.

TEST

• D.

AUTOMATIC

Correct Answer
D. AUTOMATIC
Explanation
To test the load contactor, K1, using the test probes, the automatic-manual voltage control switch must be in the AUTOMATIC position. This is because the automatic position allows for the automatic control of voltage, which is necessary for accurately testing the load contactor. The other positions (OFF, MANUAL, and TEST) do not provide the necessary voltage control for testing the load contactor.

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• 38.

### What determines the amount of potential required to forward bias a unijunction transistor?

• A.

Voltage gradient

• B.

Pinch-off voltage

• C.

Intristic stand-off ratio

• D.

Input impedance

Correct Answer
C. Intristic stand-off ratio
Explanation
The intrinsic standoff ratio determines the amount of potential required to forward bias a unijunction transistor. The intrinsic standoff ratio is a characteristic of the transistor and represents the ratio of the peak voltage to the valley voltage. It determines the level of voltage required to overcome the barrier and allow current to flow through the transistor. A higher intrinsic standoff ratio indicates a higher potential required to forward bias the transistor, while a lower ratio indicates a lower potential required.

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• 39.

### Which IMDS screen is used to access all maintenance historical data against a particular job control number?

• A.

129

• B.

914

• C.

907

• D.

122

Correct Answer
D. 122
Explanation
Screen 122 is used to access all maintenance historical data against a particular job control number in IMDS. This screen provides detailed information about the maintenance history of a specific job control number, allowing users to track and analyze past maintenance activities and their outcomes. It is a valuable tool for evaluating the effectiveness of maintenance procedures and identifying any recurring issues or patterns.

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• 40.

### Expanding or contracting the depletion region of a diode is called

• A.

Gating

• B.

Spiking

• C.

Basing

• D.

Biasing

Correct Answer
D. Biasing
Explanation
Biasing refers to the process of applying a DC voltage to a diode in order to control its operation. By applying a forward bias voltage, the depletion region of the diode is reduced, allowing current to flow through the diode. Conversely, applying a reverse bias voltage expands the depletion region, preventing current flow. Therefore, biasing is the correct term to describe the process of expanding or contracting the depletion region of a diode.

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• 41.

### What technical order contains the periodic inspection section?

• A.

Illustrated Parts TO

• B.

Operation and service TO

• C.

Overhaul TO

• D.

Lubrication chart TO

Correct Answer
B. Operation and service TO
Explanation
The periodic inspection section is typically found in the Operation and service TO (Technical Order). This TO provides instructions and guidelines for the operation and maintenance of a particular equipment or system. It includes information on routine inspections that need to be conducted periodically to ensure proper functioning and safety. Therefore, the Operation and service TO is the most appropriate technical order that contains the periodic inspection section.

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• 42.

### Which maintenance levels are referred to as field maintenance?

• A.

Depot and provisional

• B.

Provisional and centralized

• C.

Organizational and intermediate

• D.

Centralized and depot

Correct Answer
C. Organizational and intermediate
Explanation
Field maintenance refers to the maintenance levels that are conducted in the field or on-site. These levels involve maintenance tasks that can be performed by the operating unit or organization itself, without the need for specialized facilities or equipment. Organizational and intermediate maintenance levels are referred to as field maintenance because they can be carried out in the field or on the operational site, without the need to send the equipment or machinery to a centralized or depot facility for repairs or maintenance.

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• 43.

### What component of the A/M32A-86D energizes to send power to the fuel gauge during operation?

• A.

Hourmeter, M4

• B.

Oil pressure switch, S46

• C.

Oil pressure switch, S53

• D.

Fuel oil pressure switch, S48

Correct Answer
C. Oil pressure switch, S53
Explanation
The oil pressure switch, S53, energizes to send power to the fuel gauge during operation. This means that when the oil pressure reaches a certain level, the switch activates and allows power to flow to the fuel gauge, providing an accurate reading of the fuel level.

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• 44.

### What maximum AC resistive load can be portable load bank apply to a generator?

• A.

65 kilowatts

• B.

80 kilowatts

• C.

70 kilowatts

• D.

75 kilowatts

Correct Answer
D. 75 kilowatts
Explanation
A portable load bank is used to test the performance and capacity of a generator. The maximum AC resistive load that can be applied to a generator using a portable load bank is 75 kilowatts. This means that the load bank can simulate a maximum power demand of 75 kilowatts on the generator, allowing for thorough testing and evaluation of its capabilities.

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• 45.

### Lubrication system pressure in the turbine engine is regulated through a

• A.

Temperature regulator

• B.

Pressure relief valve

• C.

Filter bypass valve

• D.

Flow check valve

Correct Answer
B. Pressure relief valve
Explanation
The correct answer is the pressure relief valve. In a turbine engine, the lubrication system pressure needs to be regulated to ensure proper lubrication of the engine components. The pressure relief valve is responsible for maintaining the desired pressure level by releasing excess pressure from the system. This valve opens when the pressure exceeds a certain threshold and allows the excess oil to bypass the system, preventing damage to the engine.

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• 46.

### In a brushless AC generator, what provides the gield current for the main AC generator section?

• A.

Battery

• B.

PMG

• C.

Exciter Generator

• D.

Main generator

Correct Answer
C. Exciter Generator
Explanation
The exciter generator provides the field current for the main AC generator section in a brushless AC generator. The exciter generator is responsible for producing the necessary magnetic field to induce voltage in the main generator. It typically consists of a small generator that is connected to the main generator and uses a small portion of its output to generate the required field current. This ensures that the main generator has a constant and stable magnetic field, allowing it to generate consistent AC power.

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• 47.

### When operating the New Generation Heater, turn the heat control switch to the desired position after

• A.

Ample warm-up time

• B.

A minimum of 45 seconds

• C.

System voltage rises to 120 VAC

• D.

The inside temperature reaches 140 degrees farenheight

Correct Answer
C. System voltage rises to 120 VAC
Explanation
The correct answer is "system voltage rises to 120 VAC." This means that the heat control switch should be turned to the desired position only after the system voltage has reached 120 VAC. This ensures that the heater is properly powered and ready to operate at the desired temperature. The other options mentioned, such as ample warm-up time and the inside temperature reaching 140 degrees Fahrenheit, may be important factors to consider but they are not the specific condition mentioned in the answer.

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• 48.

### The temperature controller on the MA-3D air conditioner modulates the water flow through what component during low ambient air temperatures?

• A.

Condenser coil

• B.

Refrigerant coil

• C.

Expansion valve

• D.

Aftercooler coil

Correct Answer
D. Aftercooler coil
Explanation
During low ambient air temperatures, the temperature controller on the MA-3D air conditioner modulates the water flow through the aftercooler coil. The aftercooler coil is responsible for cooling down the air that passes through it, and by adjusting the water flow, the temperature controller can regulate the cooling process to maintain the desired temperature in the air conditioner.

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• 49.

### Total current in a series circuit is equal to the

• A.

Reciprocal of the current through one component

• B.

Sum of the current through each component

• C.

Reciprocal of the sum of the currents through each component

• D.

Current through one component

Correct Answer
D. Current through one component
Explanation
In a series circuit, the current through each component is the same. Therefore, the total current in the circuit is equal to the current through one component.

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• 50.

### You observe low cabin pressure reading during operation of the AF/M32T-1 cabin leakage tester a probable cause could be defective

• A.

Rate valve

• B.

Blower pressure gauge

• C.

Cabin pressure gauge

• D.

Flowmeter

Correct Answer
A. Rate valve
Explanation
A defective rate valve could be a probable cause for the observed low cabin pressure reading during the operation of the AF/M32T-1 cabin leakage tester. The rate valve controls the flow of air and regulates the pressure in the cabin. If it is defective, it may not be able to maintain the desired pressure, resulting in low cabin pressure readings.

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Quiz Review Timeline +

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
• Aug 12, 2013
Quiz Created by
Catherine Halcomb

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