Question 1

The charging system of a vehicle is producing 100 amps and 12.4 volts at 1500 RPM with all electrical accessories turned "on." The charging system output specification for this vehicle is 110 amps. Technician A says the alternator needs to be replaced. Technician B says the electrical demand of the vehicle may be exceeding the capacity of the charging system. Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both Technician A and B 
D)  Neither Technician A nor B

Question 2

A(n) ____ AC generator is usually found in applications that do not require high-amperage output.

Accepted Answer

A)  delta-wound 
B)  wye-wound 
C)  phase 
D)  asynchronous

Question 3

Technician A says when testing the charging system, the state of charge of the battery is not a concern. Technician B says to test the battery only if the charging system tests fail. Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both Technician A and B 
D)  Neither Technician A nor B

Question 4

Technician A says when testing, the ground side, voltage drop should be less than 0.2 volt. Technician B says the total insulated system drops should be less than 0.7 volt. Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both Technician A and B 
D)  Neither Technician A nor B

Question 5

The voltage drop test determines if the battery, regulator, and AC generator are all operating at ____.

Accepted Answer

A)  odds with each other 
B)  the same potential 
C)  the same temperature 
D)  differing current levels

Question 6

In an electronic regulator, when the AC generator output is controlled by varying the amount of time the field coil is energized, what is this called?

Accepted Answer

The answer of In an electronic regulator, when the AC...

Question 7

The HEV uses an inverter to invert the DC voltage from the HV battery into ____ voltage for use by the motors.

Accepted Answer

A)  DC/DC 
B)  HV DC 
C)  LV DC 
D)  three-phase AC

Question 8

Any sensing wire voltage drops will increase the system voltage by the amount of the drop.

Accepted Answer

A) True 
 B)False

Question 9

Describe how to perform the charging system requirement test.

Accepted Answer

The answer of Describe how to perform the charging system...

Question 10

List the areas that could cause charging voltage to be too high.

Accepted Answer

The answer of List the areas that could cause charging...

Question 11

If the output current is greater than needed, system voltage will fall below specification.

Accepted Answer

A) True 
 B)False

Question 12

Explain function of the current output test.

Accepted Answer

The answer of Explain function of the current output test....

Question 13

Describe how the voltage regulator controls AC generator output?

Accepted Answer

The answer of Describe how the voltage regulator controls AC...

Question 14

The ____ circuit supplies the initial current for the field coil that starts the buildup of the magnetic field.

Accepted Answer

A)  starter 
B)  excitation 
C)  preexcitation 
D)  charging

Question 15

If the solid-state electronic voltage regulator is not in or on the alternator, where would it be located?

Accepted Answer

The answer of If the solid-state electronic voltage regulator is...

Question 16

Sensing voltage is used by the regulator to determine how much field current is necessary.

Accepted Answer

A) True 
 B)False

Question 17

The ____ is used to make a quick determination about whether the charging system is working properly.

Accepted Answer

A)  voltage output test 
B)  visual inspection 
C)  no-load test 
D)  load test

Question 18

A ground circuit voltage drop test taken on a vehicle's alternator indicates a 0.965V drop. Technician A says this could cause a problem in the alternator's field current. Technician B says this could affect the output circuit of the alternator. Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both Technician A and B 
D)  Neither Technician A nor B

Question 19

Why should an AC generator never be operated open-circuit?

Accepted Answer

A)  It could overcharge the battery 
B)  It could burn out electronic components 
C)  It could damage the AC generator stator 
D)  None of the above

Question 20

The ____ creates the rotating magnetic field of the AC generator.

Accepted Answer

A)  rotor 
B)  rectifier 
C)  commutator 
D)  stator

Exam 7: Charging Systemscharging System Testing and Service

A(n) ____ AC generator is usually found in applications that do not require high-amperage output.

Technician A says when testing the charging system, the state of charge of the battery is not a concern. Technician B says to test the battery only if the charging system tests fail. Who is correct?

Technician A says when testing, the ground side, voltage drop should be less than 0.2 volt. Technician B says the total insulated system drops should be less than 0.7 volt. Who is correct?

The voltage drop test determines if the battery, regulator, and AC generator are all operating at ____.

In an electronic regulator, when the AC generator output is controlled by varying the amount of time the field coil is energized, what is this called?

The HEV uses an inverter to invert the DC voltage from the HV battery into ____ voltage for use by the motors.

Any sensing wire voltage drops will increase the system voltage by the amount of the drop.

Describe how to perform the charging system requirement test.

List the areas that could cause charging voltage to be too high.

If the output current is greater than needed, system voltage will fall below specification.

Explain function of the current output test.

Describe how the voltage regulator controls AC generator output?

The ____ circuit supplies the initial current for the field coil that starts the buildup of the magnetic field.

If the solid-state electronic voltage regulator is not in or on the alternator, where would it be located?

Sensing voltage is used by the regulator to determine how much field current is necessary.

The ____ is used to make a quick determination about whether the charging system is working properly.

A ground circuit voltage drop test taken on a vehicle's alternator indicates a 0.965V drop. Technician A says this could cause a problem in the alternator's field current. Technician B says this could affect the output circuit of the alternator. Who is correct?

Why should an AC generator never be operated open-circuit?

The ____ creates the rotating magnetic field of the AC generator.