Charging System Technology Quiz

The alternator is a device for changing mechanical energy into _____ energy.

• potential
• chemical
• thermal
• electrical

Technician A believes that once an engine starts running, the engine crankshaft pulley powers the alternator to supply electricity to a car’s electrical systems. Technician B feels a battery is a car’s sole electrical supplier. Who is right?

• Technician A Only
• Technician B Only
• Both Technician A and B
• Neither Technician A nor B

An alternator _____ consists of field windings mounted on a shaft.

• stator
• rotor assembly
• rectifier bridge
• diode trio

Alternator brushes ride on _____ to feed current to the field windings.

• bearings
• fan teeth
• slip rings
• hair

The alternator _____ changes alternating current into direct current.

• transistor
• stator
• rectifier
• regulator

An alternator _____ consists of three groups of windings and produces the electrical output of the alternator.

• transistor
• stator
• rectifier
• regulator

Technician A says alternator rear bearings are frequently held in place with a small plate and screws. Technician B says alternator front bearings are usually press-fit. Who is right?

• Technician A Only
• Technician B Only
• Both Technician A and B
• Neither Technician A nor B

A voltage regulator controls alternator output by changing the amount of current flowing through the _____.

• rotor

• battery cable

• stator

• diode

The alternator current must be _____ into direct current before entering the vehicle’s electrical system.

• forward biased
• reverse biased
• rectified
• inverted

The voltage regulator keeps alternator output at a preset charging voltage of approximately _____ to _____ volts.

• 12-14
• 12-16
• 12.0-12.6
• 13-15