Deck 55: Charging System Diagnosis and Service

Question 1

What test is being performed in this illustration (engine running)?

A)AC ripple voltage test
B)Diode test
C)Charging system current test
D)Alternator voltage output test

Answer 1

AC ripple voltage test

Question 2

Technician A says that a loose drive belt could cause overcharging. Technician B says that undersized wiring between the alternator and the battery could cause undercharging. Who is right?

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

Answer 2

Technician B only

Question 3

An alternator has no output. Technician A says that the alternator field circuit may have an open circuit. Technician B says that the fusible link may be open in the alternator to battery wire. Who is right?

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

Question 4

A vehicle battery is consistently low on voltage. Technician A says to disconnect the battery with the engine running to test for proper alternator output. Technician B says that a loose alternator belt may cause this problem. Who is right?

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

Question 5

All of these alternator components should be electrically tested, EXCEPT ________.

A)Diodes
B)Rotor
C)Stator
D)End Frame

Question 6

Technician A says when testing for maximum alternator output, the battery must be loaded to force the alternator to produce its maximum output. Technician B says after disassembly, all alternator internal components should be tested using an ammeter. Who is right?

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

Question 7

Technician A says that by full fielding the alternator, you are bypassing the voltage regulator. Technician B says that full fielding can possibly damage electronic circuits, so it is no longer a recommended test. Who is right?

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

Question 8

Technician A says that charging system testing requires that the battery be at least 75% charged. Technician B says that a digital multimeter can not be used to test charging system voltage. Who is right?

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

Question 9

Identify this alternator component.

A)Rectifier bridge
B)Diode trio
C)Alternator end housing
D)Stator linkage