Question 1

Testing the voltage regulator circuit by full fielding the alternator is a common diagnostic technique on modern cars.

Accepted Answer

A) True 
 B)False

Question 2

Late model vehicles with PCM-controlled AC generators can generate more engine power due to decreased magnetic drag caused by the AC generator.

Accepted Answer

A) True 
 B)False

Question 3

On a B circuit AC generator, the regulator is on the negative side of the circuit.

Accepted Answer

A) True 
 B)False

Question 4

A technician connects the red lead of a voltmeter to the B+ [output] terminal of an AC generator and the black lead to the battery positive terminal. He starts the engine and turns on all the lights and electrical accessories. What is the technician measuring?

Accepted Answer

A)  resistance in the positive side charging system cables 
B)  diode leakage 
C)  charging voltage 
D)  charging current

Question 5

The voltage regulator controls voltage by varying the field current through the rotor.

Accepted Answer

A) True 
 B)False

Question 6

How does a voltage regulator control AC generator voltage output?

Accepted Answer

The answer of How does a voltage regulator control AC...

Question 7

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

Accepted Answer

The answer of The alternating current produced by the AC...

Question 8

What type of test equipment is needed to perform a charging system current output test?

Accepted Answer

A)  an ammeter 
B)  a voltmeter 
C)  a lab scope 
D)  a VAT with a carbon pile

Question 9

With no electrical load, charging voltage during a voltage output test should be approximately ____________________ volts higher than during an open circuit voltage test.

Accepted Answer

The answer of With no electrical load, charging voltage during...

Question 10

Which of the following is NOT a way to increase the amount of voltage induced in an AC generator?

Accepted Answer

A)  Increase the number of conductors 
B)  Move the conductors through the magnetic field slowly 
C)  Move the conductors at a right angle to the magnetic field 
D)  Increase the current going through the electromagnet

Question 11

AC generators produce overlapping sine waves three-phase voltage.

Accepted Answer

A) True 
 B)False

Question 12

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?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 13

The bearings that support the rotor shaft are located on the ______.

Accepted Answer

A)  stator housing 
B)  end frames 
C)  rectifier 
D)  tensioner bracket

Question 14

Most newer vehicles do not have a separate voltage regulator and control the output of the charging system through the ____________________.

Accepted Answer

The answer of Most newer vehicles do not have a...

Question 15

A zener diode is a special type of diode that blocks the current when the polarity is reversed, but only as long as the voltage is low. When the voltage rises above a critical level, the current can flow through it in a reverse direction.

Accepted Answer

A) True 
 B)False

Question 16

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?

Accepted Answer

A)  A only 
B)  B only 
C)  both A and B 
D)  neither A nor B

Question 17

Air cooling or liquid cooling is required in an AC generator to maintain the temperature of the _____.

Accepted Answer

A)  stator 
B)  rotor 
C)  voltage regulator 
D)  diodes [rectifier]

Question 18

Circuit resistance is checked by connecting a(n) ____________________ to the positive battery terminal and the output, or battery terminal of the AC generator.

Accepted Answer

The answer of Circuit resistance is checked by connecting a(n)...

Question 19

A voltage regulator controls the voltage output of an AC generator by controlling the current through the ____________________.

Accepted Answer

The answer of A voltage regulator controls the voltage output...

Question 20

____________________ braking is the process of using the motor/generator to convert kinetic energy into electrical energy to recharge the batteries while slowing the vehicle.

Accepted Answer

The answer of ____________________ braking is the process of using...

Exam 19: Charging Systems

Testing the voltage regulator circuit by full fielding the alternator is a common diagnostic technique on modern cars.

Late model vehicles with PCM-controlled AC generators can generate more engine power due to decreased magnetic drag caused by the AC generator.

On a B circuit AC generator, the regulator is on the negative side of the circuit.

A technician connects the red lead of a voltmeter to the B+ [output] terminal of an AC generator and the black lead to the battery positive terminal. He starts the engine and turns on all the lights and electrical accessories. What is the technician measuring?

The voltage regulator controls voltage by varying the field current through the rotor.

How does a voltage regulator control AC generator voltage output?

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

What type of test equipment is needed to perform a charging system current output test?

With no electrical load, charging voltage during a voltage output test should be approximately ____________________ volts higher than during an open circuit voltage test.

Which of the following is NOT a way to increase the amount of voltage induced in an AC generator?

AC generators produce overlapping sine waves three-phase voltage.

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?

The bearings that support the rotor shaft are located on the ______.

Most newer vehicles do not have a separate voltage regulator and control the output of the charging system through the ____________________.

A zener diode is a special type of diode that blocks the current when the polarity is reversed, but only as long as the voltage is low. When the voltage rises above a critical level, the current can flow through it in a reverse direction.

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?

Air cooling or liquid cooling is required in an AC generator to maintain the temperature of the _____.

Circuit resistance is checked by connecting a(n) ____________________ to the positive battery terminal and the output, or battery terminal of the AC generator.

A voltage regulator controls the voltage output of an AC generator by controlling the current through the ____________________.

____________________ braking is the process of using the motor/generator to convert kinetic energy into electrical energy to recharge the batteries while slowing the vehicle.