Question 1

Technician A says the charging system recharges the battery by supplying a constant and relatively low charge to the battery. Technician B says the charging system works on the principles of magnetism to change mechanical energy into electrical energy. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

The charging system recharges the battery by supplying a constant and relatively low charge to the battery (alternator). The charging system works on the principles of magnetism to change mechanical energy into electrical energy (generator).

Question 2

Before adjusting drive-belt tension, Technician A checks for proper pulley alignment. Technician B looks up the specified belt tension in the vehicle's service manual. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both technicians are correct in their approach. Technician A is checking for proper pulley alignment, which is crucial before adjusting the belt tension to ensure the belt operates smoothly and efficiently. Technician B is looking up the specified belt tension in the vehicle's service manual, which is important to adjust the belt tension accurately according to the manufacturer's specifications.

Question 3

The alternating current produced by the AC generator is rectified into DC (direct current)through the use of ______.
A)transistors
B)electromagnetic relays
C)diodes
D)capacitors

Accepted Answer

Diodes are specifically designed to allow current to flow in one direction only, effectively converting alternating current (AC) into direct current (DC) by rectification. This property makes them essential components in the rectification process.

Question 4

Technician A says the magnetic field in an AC generator is stationary. Technician B says the rotor in an AC generator is driven by a belt. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

The answer of Technician A says the magnetic field in...

Question 5

Hybrid vehicles are being discussed. Technician A says some hybrid vehicles use a motor/generator that is connected to the camshaft by a drive belt. Technician B says the motor/generator on a hybrid vehicle is located at the flywheel. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

The answer of Hybrid vehicles are being discussed. Technician A...

Question 6

Technician A uses a current output test to check AC generator output. Technician B uses a voltage output test to check output. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both Technician A and Technician B are correct because checking both current output and voltage output are valid methods for assessing an AC generator's performance.

Question 7

Technician A says increasing the strength of the magnetic field in an AC generator increases the voltage output. Technician B says the voltage regulator controls the strength of the rotor's magnetic field. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both statements are correct. Increasing the strength of the magnetic field in an AC generator does indeed increase the voltage output, and the voltage regulator controls the strength of the rotor's magnetic field to regulate the generator's output voltage.

Question 8

When checking AC generator output using an oscilloscope, the correct pattern resembles ______.
A)the rounded tops of a picket fence
B)a square sine-wave pattern
C)a square wave
D)a sawtooth wave

Accepted Answer

The correct pattern resembles the rounded tops of a picket fence because the AC generator output is a sine wave.

Question 9

A voltage drop over _____ volt(s)indicates high resistance in either the circuit or ground wiring of the charging system.
A)0.1
B)0.2
C)0.5
D)1.0

Accepted Answer

A voltage drop of 0.5 volts or more typically indicates high resistance in the circuit or ground wiring of the charging system, which can affect performance.

Question 10

Oscilloscope patterns are being discussed; Technician A says an open or shorted diode can be detected by the waveform on a lab scope without removing the generator from the vehicle. Technician B says the waveform produced by the AC generator after the output moves through the diodes is a straight line because it is a constant DC voltage. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Technician A is correct because an oscilloscope can indeed detect anomalies in diode function by analyzing the waveform, allowing for diagnostics without removing the generator. Technician B is incorrect because the waveform after rectification by diodes is not a perfect straight line due to ripple, indicating it's not a constant DC voltage.

Question 11

Slip rings and brushes ______.
A)mount on the rotor shaft
B)conduct current to the rotor field coils
C)are insulated from each other and the rotor shaft
D)All the answers are correct.

Accepted Answer

Slip rings and brushes are components used in electrical machines, such as alternators and synchronous motors, to provide electrical connections to the rotating rotor. They mount on the rotor shaft (A), conduct current to the rotor field coils (B), and are insulated from each other and the rotor shaft to prevent short circuits (C). Therefore, all the given statements are correct.

Question 12

Technician A says an a circuit has the regulator on the positive side of the field coil. Technician B says on an isolated field circuit, the regulator may be on the negative or the positive side. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

The answer of Technician A says an a circuit has...

Question 13

Technician A says electricity can be generated by moving a magnetic field across an electrical conductor. Technician B says electricity can be generated by moving an electrical conductor across a magnetic field. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

Both statements are correct as electricity can be generated through electromagnetic induction, which occurs when a magnetic field and an electrical conductor move relative to each other.

Question 14

Voltage regulator circuitry in the computer control module controls AC generator output by ______.
A)using a variable resistor to vary current flow to the rotor field windings
B)pulsing current flow to the rotor field windings on and off
C)both A and B
D)neither A nor B

Accepted Answer

The voltage regulator in a computer control module typically controls the AC generator output by pulsing current flow to the rotor field windings on and off, rather than using a variable resistor.

Question 15

Which type of stator winding produces high AC generator charging voltage at low speeds?
A)wye
B)delta
C)trio
D)series

Accepted Answer

Wye (or Y) configuration in stator windings is known for its ability to produce a higher voltage at lower speeds compared to other configurations, making it suitable for applications where charging at low speeds is desirable.

Question 16

Which of the following precautions should be followed whenever working on or testing a charging system?
A)Make sure a load is on the system before energizing the AC generator
B)Ground the alternator's output terminals
C)Disconnect the positive side of the battery before disconnecting any wire to and from the AC generator or battery
D)All the answers are correct.

Accepted Answer

The answer of Which of the following precautions should be...

Question 17

A rotating magnetic field inside a set of stationary conducting wires is a simple description of a(n)______.
A)DC generator
B)AC generator
C)voltage regulator
D)None of the answers is correct.

Accepted Answer

A rotating magnetic field inside a set of stationary conducting wires describes the basic operation of an AC (Alternating Current) generator. This process induces an alternating current in the wires due to electromagnetic induction.

Question 18

Which part of the AC generator produces the moving magnetic field?
A)stator
B)rotor
C)brushes
D)poles

Accepted Answer

The rotor is the rotating part of an AC generator that produces a moving magnetic field. This is achieved by rotating a magnet or an electromagnet, inducing an alternating current in the stationary part of the generator, known as the stator.

Question 19

Technician A says a DC generator is much different in construction to an electric motor. Technician B says DC generators have almost unlimited output, especially at low speeds. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Accepted Answer

DC generators and electric motors have similar construction, and DC generators do not have unlimited output, especially at low speeds.

Question 20

Integrated voltage regulators ______.
A)mount to the back of or inside the AC generator housing
B)may be integrated with the brush holder assembly
C)are not serviceable and must be replaced if defective
D)All the answers are correct.

Accepted Answer

Integrated voltage regulators can be mounted to the back of or inside the AC generator housing, may be integrated with the brush holder assembly, and are not serviceable, meaning they must be replaced if found to be defective.

Quiz 19: Charging Systems

Technician A says the charging system recharges the battery by supplying a constant and relatively low charge to the battery. Technician B says the charging system works on the principles of magnetism to change mechanical energy into electrical energy. Who is correct?

Before adjusting drive-belt tension, Technician A checks for proper pulley alignment. Technician B looks up the specified belt tension in the vehicle's service manual. Who is correct?

The alternating current produced by the AC generator is rectified into DC (direct current) through the use of ______.

Technician A says the magnetic field in an AC generator is stationary. Technician B says the rotor in an AC generator is driven by a belt. Who is correct?

Hybrid vehicles are being discussed. Technician A says some hybrid vehicles use a motor/generator that is connected to the camshaft by a drive belt. Technician B says the motor/generator on a hybrid vehicle is located at the flywheel. Who is correct?

Technician A uses a current output test to check AC generator output. Technician B uses a voltage output test to check output. Who is correct?

Technician A says increasing the strength of the magnetic field in an AC generator increases the voltage output. Technician B says the voltage regulator controls the strength of the rotor's magnetic field. Who is correct?

When checking AC generator output using an oscilloscope, the correct pattern resembles ______.

A voltage drop over _____ volt(s) indicates high resistance in either the circuit or ground wiring of the charging system.

Slip rings and brushes ______.

Technician A says an a circuit has the regulator on the positive side of the field coil. Technician B says on an isolated field circuit, the regulator may be on the negative or the positive side. Who is correct?

Technician A says electricity can be generated by moving a magnetic field across an electrical conductor. Technician B says electricity can be generated by moving an electrical conductor across a magnetic field. Who is correct?

Voltage regulator circuitry in the computer control module controls AC generator output by ______.

Which type of stator winding produces high AC generator charging voltage at low speeds?

Which of the following precautions should be followed whenever working on or testing a charging system?

A rotating magnetic field inside a set of stationary conducting wires is a simple description of a(n) ______.

Which part of the AC generator produces the moving magnetic field?

Technician A says a DC generator is much different in construction to an electric motor. Technician B says DC generators have almost unlimited output, especially at low speeds. Who is correct?

Integrated voltage regulators ______.