Question 1

A shorted ____ will have low readings in both directions.

Accepted Answer

A)  diode 
B)  ohmmeter 
C)  ferrule 
D)  rotor 
A)  diode 
B)  ohmmeter 
C)  ferrule 
D)  rotor A

Question 2

All of the following statements are true EXCEPT:

Accepted Answer

A)  diodes must be in good condition if the AC generator is to function correctly. 
B)  one or more leaking diodes will decrease generator output. 
C)  if more than 0.2 AC volt is found in the B+ output, defective diodes are indicated. 
D)  diodes prevent AC from leaving the AC generator in the B+ output wire. 
A)  diodes must be in good condition if the AC generator is to function correctly. 
B)  one or more leaking diodes will decrease generator output. 
C)  if more than 0.2 AC volt is found in the B+ output, defective diodes are indicated. 
D)  diodes prevent AC from leaving the AC generator in the B+ output wire. C

Question 3

The ____________________ test loads the charging system and measures its current output.

Accepted Answer

charging system output

Question 4

Extra resistance in the regulator circuit will cause the battery to have a lower than normal charging voltage.

Accepted Answer

A) True 
 B)False

Question 5

While having a discussion, Technician A says that if you replace a battery simply because it is old, this will not solve a charging problem caused by something else. Technician B says that a new battery is the only solution. Who is correct?

Accepted Answer

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

Question 6

AC generator ground wires are usually braided ground straps. The condition of these wires is as important as the insulated wires because they carry the same current flow.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following statements is LEAST-Likely true?

Accepted Answer

A)  Checking voltage drops as a preventive maintenance measure will catch potential problems before they fully develop. 
B)  A small amount of voltage drop through the fuse link, which is a smaller wire than the rest of the circuit, is normal. 
C)  There are no fuse links in the ground circuit, so lower voltage drop (0.1 volt) is desired. 
D)  When performing a voltage drop test, remember that current must not be running through the circuit. 
A)  Checking voltage drops as a preventive maintenance measure will catch potential problems before they fully develop. 
B)  A small amount of voltage drop through the fuse link, which is a smaller wire than the rest of the circuit, is normal. 
C)  There are no fuse links in the ground circuit, so lower voltage drop (0.1 volt) is desired. 
D)  When performing a voltage drop test, remember that current must not be running through the circuit.

Question 8

What possible problems can be caused by a loose drive belt?

Accepted Answer

A loose drive belt can cause two problem

Question 9

A good ____________________ will show high resistance in one direction and low resistance in the opposite direction.

Accepted Answer

The answer of A good ____________________ will show high resistance...

Question 10

A(n) ____________________ regulator has its regulator between the positive feed (insulated side) and the field coil, which is grounded inside of the AC generator.

Accepted Answer

B-circuit,

Question 11

The test MOST-Likely used to eliminate voltage regulation and fully energize the rotor is the:

Accepted Answer

A)  charging system output test 
B)  circuit resistance test 
C)  voltage test 
D)  full-field test 
A)  charging system output test 
B)  circuit resistance test 
C)  voltage test 
D)  full-field test

Question 12

When there is excessive AC output coming from an AC generator, a car radio sometimes makes a whining sound like a siren.

Accepted Answer

A) True 
 B)False

Question 13

The tool MOST-Likely used to look at AC generator patterns is a(n):

Accepted Answer

A)  alternator 
B)  lab scope 
C)  diode 
D)  regulator 
A)  alternator 
B)  lab scope 
C)  diode 
D)  regulator

Question 14

All of the following statements are true EXCEPT:

Accepted Answer

A)  after the engine starts, the control module or voltage regulator will energize the AC generator field and keep voltage at a predetermined level for about 30 seconds. 
B)  a defective electronic voltage regulator or computer is not a typical cause of a low charge problem. 
C)  the speed of an AC generator determines its output. 
D)  at idle, an AC generator is not capable of making maximum output. 
A)  after the engine starts, the control module or voltage regulator will energize the AC generator field and keep voltage at a predetermined level for about 30 seconds. 
B)  a defective electronic voltage regulator or computer is not a typical cause of a low charge problem. 
C)  the speed of an AC generator determines its output. 
D)  at idle, an AC generator is not capable of making maximum output.

Question 15

Resistance on the ground side of a regulator will raise system voltage by the amount of the voltage drop caused by the resistance.

Accepted Answer

A) True 
 B)False

Question 16

What precautions should you take when performing an alternator test?

Accepted Answer

- Connecting the wrong wire to a ground

Question 17

Which of the following is LEAST-Likely to cause you to replace a rotor?

Accepted Answer

A)  A reading below specs indicates a shorted rotor. 
B)  High resistance mean connections are corroded. 
C)  The continuity of the rotor winding does not have any opens, shorts, or grounds. 
D)  Infinite resistance means the rotor is open. 
A)  A reading below specs indicates a shorted rotor. 
B)  High resistance mean connections are corroded. 
C)  The continuity of the rotor winding does not have any opens, shorts, or grounds. 
D)  Infinite resistance means the rotor is open.

Question 18

A hot AC generator loses 75% of its rated output.

Accepted Answer

A) True 
 B)False

Question 19

Bad ____ are a common cause of AC generator charging problems.

Accepted Answer

A)  diodes 
B)  ohmmeters 
C)  ferrules 
D)  rotors 
A)  diodes 
B)  ohmmeters 
C)  ferrules 
D)  rotors

Question 20

While having a discussion, Technician A says that the A-circuit has the regulator in the ground circuit and is the type used most often with electronic systems. Technician B says that it is the B-circuit that is configured that way. Who is correct?

Accepted Answer

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

Exam 31: Charging System Service

A shorted ____ will have low readings in both directions.

All of the following statements are true EXCEPT:

The ____________________ test loads the charging system and measures its current output.

Extra resistance in the regulator circuit will cause the battery to have a lower than normal charging voltage.

While having a discussion, Technician A says that if you replace a battery simply because it is old, this will not solve a charging problem caused by something else. Technician B says that a new battery is the only solution. Who is correct?

AC generator ground wires are usually braided ground straps. The condition of these wires is as important as the insulated wires because they carry the same current flow.

Which of the following statements is LEAST-Likely true?

What possible problems can be caused by a loose drive belt?

A good ____________________ will show high resistance in one direction and low resistance in the opposite direction.

A(n) ____________________ regulator has its regulator between the positive feed (insulated side) and the field coil, which is grounded inside of the AC generator.

The test MOST-Likely used to eliminate voltage regulation and fully energize the rotor is the:

When there is excessive AC output coming from an AC generator, a car radio sometimes makes a whining sound like a siren.

The tool MOST-Likely used to look at AC generator patterns is a(n):

All of the following statements are true EXCEPT:

Resistance on the ground side of a regulator will raise system voltage by the amount of the voltage drop caused by the resistance.

What precautions should you take when performing an alternator test?

Which of the following is LEAST-Likely to cause you to replace a rotor?

A hot AC generator loses 75% of its rated output.

Bad ____ are a common cause of AC generator charging problems.

While having a discussion, Technician A says that the A-circuit has the regulator in the ground circuit and is the type used most often with electronic systems. Technician B says that it is the B-circuit that is configured that way. Who is correct?

Introduction to the Automobile

Automotive Careers and Technician Certification

Shop Safety

Shop Management, Service Records, and Parts

Locating Service Information and Specifications

Measuring Tools and Systems

Hardware, Fasteners, Drills, and Thread Repair

Shop Tools

General Shop Equipment

Cleaning Equipment and Methods

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Engine Lubrication

Underhood and Body Inspection Car on Ground

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Introduction to the Engine

Engine Classifications and Advanced Transportation Technologies

Engine Size and Measurements

Engine Upper End

Engine Lower End and Lubrication System Theory

Cooling System Theory

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Automotive Belts

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Automotive Plumbing: Tubing and Pipe

Basic Electrical System Theory and Repairs

Battery Fundamentals

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Starting System Fundamentals

Starting System Service

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Lighting and Wiring Fundamentals

Lighting and Wiring Service

Safety, Security, Comfort Systems, and Electrical Accessories

Heating and Air Conditioning Fundamentals

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Fuels and Alternative Fuels

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Fuel System Service

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