WorksheetsCharging Systems
Total questions: 24
Worksheet time: 2hrs 28mins
Which one of these best describes function of the alternator?
Electric generator that uses mechanical (engine) power to produce electricity
Ammeter, voltmeter, or warning light that warns the driver about charge condition
Wiring that connects the parts of the system.
Large device that stores electricity for use later on
True or False: An alternator produces a Alternating Current (AC).
True
False
True or False: Today's automobiles operate using direct current.
True
False
What is the name of an electrical device that only allows current flow in one direction. Otherwise known as a electrical check valve?
Fuse
Diode
Photocell
Multi-meter
What is the purpose of the diode in the charging system?
Transform the AC voltage from the alternator into DC voltage
Transform the DC voltage from the alternator into AC voltage
The alternator rotor spins inside the alternator stator.
True
False
The alternator brushes ride on the slip rings to make a electrical connection. (True/False)
True
False
On the common Voltage Rectifier how many diodes are used to convert AC to DC?
2
4
6
8
Why does an alternator use a internal or external fan?
To keep the EPA happy
To help cool the engine
To cool off the diodes preventing damage
To make the alternator cool looking
Alternators work on this principle - voltage is induced in a wire as it passes through a __________
Magnetic field
Solenoid
Resistor
Wire
In the alternator, the which is in motion? (One answer)
The wires into which voltage is induced
The magnetic field which induces the voltage
The voltage regulator
The rectifier
The magnetic field is:
A permanent magnet
The field coil - an electromagnet
The north and south pole pieces
The wires in the stator
Where is the field coil located?
In the rotor
Coils make up the stator
In the battery
In the voltage regulator
What is the purpose of the brushes?
To transmit current to the field coil while it rotates
To receive induced voltage
To transform AC voltage to DC voltage
The brush up the voltage to 14.2V (charging voltage)
The stator typically contains __ set of wire windings
1
2
3
4
Stator windings could take two configurations. What are they? (Two answers)
Wye
Delta
Rectifier
Star
The rectifier...
Converts AC voltage into DC voltage
Converts DC voltage into AC voltage
Is also known as the voltage regulator
All of the above
When testing voltage drop from the battery positive post to the alternator output stud, you find 5 volts. What does this test result mean?
When testing voltage drop from the battery positive post to the alternator output stud, you find 0.3 volts. What does this test result mean?
The positive cable is OK, and more testing is required
A new engine has been installed in a car, and on the first road test, the alternator is not charging properly - maximum 12.2 volts when tested at the battery. What is the most likely issue?
Corrosion where the ground bolts to the engine block
The alternator has failed because it was stored on concrete
Paint on the new engine block is causing resistance for the alternator's physical ground
The alternator must be calibrated for the new engine
What component does the BCM use to determine the load and charge applied to the battery?
The BCM internal windings
The CAN network
The battery negative post
A battery current sensor
What are the two main circuits of an alternator?
Field and Output
Field and Rotor
Rotor and Armature
Coil pack and Commutation Stator
Draw a picture of an alternator rotor
Draw a picture of an alternator stator
