Deck 30: Charging System Fundamentals

Question 1

13)When there is a charging system problem, which of the following systems is LEAST-Likely to indicate a problem?

A) Heat sink
B) Warning light
C) Ammeter
D) Voltmeter

Answer 1

A

Question 2

11)While having a discussion, Technician A says that when charging system voltage is low and accessories are loading the system, the regulator increases the AC generator current output. Technician B says that if system voltage is normal and there is a heavy accessory load, the AC generator will run the accessories with little drain on the battery. Who is correct?

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

Answer 2

C

Question 3

2)Carbon brushes that ride on the slip rings provide electricity to the field coil.

Answer 3

True

Question 4

6)The ____ is a rotating electromagnetic field, and as it spins, its magnetic field cuts across the windings of the stator.

A) commutator
B) rotor
C) slip ring
D) diode

Question 5

16)The ____________________ includes an alternating current (AC) generator (sometimes called an alternator), a voltage regulator, a dash light or gauge, and related wiring.

Question 6

19)When the rotor spins, an alternating north/south polarity is created (AC current). This is called ____________________.

Question 7

3)The stator fits in the frame of the AC generator, between the front and rear halves of the cast aluminum housing.

Question 8

5)An alternator is an electronic component that only conducts electricity when a certain voltage is reached.

Question 9

15)Which of the following statements is LEAST-Likely true?

A) The typical electrical requirements of a 1970 automobile amounted to about 500 watts.
B) Today, it is unusual to find 150-amp AC generators on passenger vehicles.
C) Alternators (AC generators) on 1970s vehicles typically put out from 35 to 50 amps.
D) As vehicles evolve, electrical demand is projected to increase to more than double today's level, that is, to 10,000 watts or more.

Question 10

10)The component that MOST-Likely controls the current passing through the windings of the electromagnetic field in the rotor is the:

A) diode
B) stator
C) voltage regulator
D) heat sink

Question 11

8)A ____ is a one-way check valve for electricity.

A) slip ring
B) heat sink
C) diode
D) stator

Question 12

14)While having a discussion, Technician A says that voltage will be closer to 14.4 to 14.8 volts when the system is very cold and closer to 13.5 volts when the system is hot. Technician B says that voltage is closer to 13.5 volts when the system is very cold and closer to 15.5 volts when the system is hot. Who is correct?

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

Question 13

1)he charging system works hardest after the engine is first started as well as when all electrical options are operating.

Question 14

12)All of the following statements are true EXCEPT:

A) the voltage regulator controls the current passing through the windings of the electromagnetic field in the rotor.
B) the voltage regulator can be located on either the ground side or the positive side of the field circuit.
C) electronic voltage regulation requires no moving parts, so it can cycle electronically between 10 and 7,000 times per second.
D) turning the AC generator rapidly on and off to achieve a precise output is called voltage width modulation.

Question 15

17)A(n) ____________________ resembles an electric motor, having a stationary magnetic field with an armature output winding spinning inside.

Question 16

18)When current passes through a coiled wire, a magnetic field builds up around the wire. This is called a(n) ____________________.

Question 17

4)Electronic voltage regulators were phased in during the late 1960s.

Question 18

7)All of the following statements are true EXCEPT:

A) when a stator is wound with a delta connection, the leads of the windings are connected together in series.
B) a wye (Y) winding is used in high-output AC generator.
C) a delta winding can put out about one-third more current at highway speeds than a Y-wound stator.
D) because it is about one-third less efficient at idle speed, there is a problem with delta-wound AC generators.

Question 19

20)An AC generator produces ____________________.

Question 20

9)The component MOST-Likely to be used to help dissipate the heat that occurs as electrons try to pass the diode is the:

A) slip ring
B) heat sink
C) alternator
D) stator

Question 21

24)What is an advantage of a voltmeter?

Question 22

25)What are the disadvantages of an ammeter?

Question 23

23)What is the purpose of an alternator fan?

Question 24

22)What is the difference between an AC generator and a generator?

Question 25

21)What are some of the drawbacks of the generator when compared to the alternator?