Question 1

Some alternators are cooled by engine coolant.

Accepted Answer

Some alternators, especially those in high-performance or heavy-duty applications, are indeed cooled by engine coolant to manage their temperature and ensure efficient operation.

Question 2

A duty cycle of 90% means the circuit is off most of the time.

Accepted Answer

A duty cycle of 90% means the circuit is on for 90% of the time and off for only 10% of the time, indicating it is on most of the time.

Question 3

The GM electrical power management system has 3 modes of operation.

Accepted Answer

The GM electrical power management system typically has more than 3 modes of operation, including modes such as Run, Accessory, Start, and various battery-saving modes to manage the vehicle's electrical load and ensure optimal performance.

Question 4

On a vehicle using an electrical power management system (EPM), how is the current to the battery measured?&#10;A)With an in-line ammeter&#10;B)By use of a duty-cycle sensor&#10;C)With a Hall effect sensor&#10;D)By using a custom voltmeter

Accepted Answer

The current to the battery in a vehicle using an electrical power management system (EPM) is typically measured with a Hall effect sensor. This sensor can accurately measure the flow of current without direct contact with the electrical conductor, making it ideal for automotive applications where safety and accuracy are paramount.

Question 5

Which of these components is the stator?  &#10;A)A&#10;B)B&#10;C)C&#10;D)D

Accepted Answer

The answer of Which of these components is the stator?...

Question 6

Which of these is TRUE about an alternator with an overrunning pulley?&#10;A)Replacement pulley must be the overrunning type&#10;B)It can use a conventional replacement pulley&#10;C)Both A and B&#10;D)Neither A nor B

Accepted Answer

An alternator with an overrunning pulley must have its pulley replaced with another overrunning type to ensure proper function and avoid damage. Conventional pulleys cannot substitute for overrunning pulleys due to differences in design and operation.

Question 7

How much current flows through the alternator brushes?&#10;A)25 to 35 A, depending on the vehicle&#10;B)2-5&#10;C)10 to 15 A&#10;D)All of the alternator output flows through the brushes

Accepted Answer

The current that flows through the alternator brushes is relatively low, typically in the range of 2-5 amperes. This is because the brushes are part of the field circuit, which requires only a small amount of current to create the magnetic field necessary for the alternator to generate electricity. The bulk of the alternator's output current flows through the stator windings, not through the brushes.

Question 8

Electronic voltage regulators use a temperature-sensitive resistor in the regulator circuit. This resistor, called a thermistor, provides lower resistance as the temperature ________.&#10;A)Stays the same&#10;B)Increases&#10;C)Decreases&#10;D)Doubles

Accepted Answer

Thermistors are temperature-sensitive resistors that decrease in resistance as the temperature increases. This characteristic allows them to be used in various applications, including electronic voltage regulators, to compensate for temperature changes.

Question 9

Current for the rotor flows through the brushes to the ________.&#10;A)Stator&#10;B)Slip rings&#10;C)Regulator&#10;D)Rotor

Accepted Answer

Current for the rotor flows through the brushes to the slip rings, which then provide the electrical connection to the rotating rotor.

Question 10

An alternator stator with three windings usually has how many diodes?&#10;A)2&#10;B)6&#10;C)4&#10;D)8

Accepted Answer

An alternator stator with three windings typically has 6 diodes, with each winding connected to a pair of diodes (one for positive and one for negative half-cycles), to rectify the AC current into DC.

Question 11

Technician A says that a magnetic field is created in the alternator rotor. Technician B says that alternator output is increased if the speed of the alternator is decreased. Who is right?&#10;A)Technician A only&#10;B)Technician B only&#10;C)Both technicians A and B&#10;D)Neither technician A nor B

Accepted Answer

The answer of Technician A says that a magnetic field...

Question 12

Technician A says that current is created in the stator windings of an alternator. Technician B says that the voltage regulator controls the current flow through the rotor. Who is right?&#10;A)Technician A only&#10;B)Technician B only&#10;C)Both technicians A and B&#10;D)Neither technician A nor B

Accepted Answer

The answer of Technician A says that current is created...

Question 13

One horsepower is equal to ________ watts.&#10;A)1050&#10;B)746&#10;C)500&#10;D)None of these

Accepted Answer

The answer of One horsepower is equal to ________ watts.&#10;A)1050&#10;B)746&#10;C)500&#10;D)None...

Question 14

Alternators induce voltage by rotating which of these?&#10;A)Magnetic field inside a fixed conductor&#10;B)Conductor around a fixed stator&#10;C)Diodes inside a magnetic field&#10;D)Stator inside a magnetic field

Accepted Answer

The answer of Alternators induce voltage by rotating which of...

Question 15

Which of these facts is correct about a delta-wound stator?&#10;A)The circuit diagram looks like a parallelogram&#10;B)No ground connection&#10;C)No neutral junction&#10;D)The windings always form a series circuit

Accepted Answer

The answer of Which of these facts is correct about...

Question 16

The output diodes in an alternator are mounted to which of these components?&#10;A)Rotor&#10;B)Stator&#10;C)Housing&#10;D)Slip rings

Accepted Answer

The answer of The output diodes in an alternator are...

Deck 54: Charging System