CH 39 Electrical Fundamentals

Question 1

A loose ground connection ____

Answer 1

Both causes less power to be available to the electrical components and causes reduced current flow

Question 2

Electrical controls such as switches ____

Answer 2

Both control electrical flow in the circuit and may be on either the source or ground side of the circuit

Question 3

If 12 volts are being applied to a resistance of 3 ohms, ____ amperes will flow.

Answer 3

4

Question 4

An open electrical circuit has zero ohms resistance.

Answer 4

False

Question 5

A complete circuit that is continuous from source through loads and back to ground has _____

Answer 5

continuity

Question 6

In a circuit with a short to ground ______

Answer 6

Both no current flows past the point of the short and some or all of the electrical loads may no longer work

Question 7

What is the symbol for voltage used in calculations?

Answer 7

E

Question 8

Which component in this electrical circuit is considered the “load”?

Answer 8

Light bulb

Question 9

If an insulated wire rubbed through a part of the insulation and the wire conductor touched the steel body of a vehicle, the type of failure would be called a(n) _____

Answer 9

Short to ground

Question 10

Excessive corrosion on an electrical connector ____

Answer 10

can cause lights to be dim

Question 11

A sheet metal screw holding a metal body panel has pierced the insulation of a wire and is touching the copper wire. This would cause a ____

Answer 11

Short to Ground

Question 12

The electrical path to ground may be completed by ______

Answer 12

Both the metal body of the vehicle and the vehicle frame

Question 13

Corrosion on electrical terminals may cause ____

Answer 13

lights to be dimmer than normal

Question 14

If the voltage increases in a circuit, what happens to the current (amperes) if the resistance stays the same?

Answer 14

Increases

Question 15

If two insulated wires were to melt together where the copper conductors touched each other, the type of failure would be called a(n)

Answer 15

short to voltage

Question 16

Which circuit failure is most likely to cause a fuse to blow?

Answer 16

Short to ground

Question 17

High resistance in a circuit

Answer 17

reduces current flow through the circuit

Question 18

How many watts are consumed by a starter motor if it draws 150 amperes at 10 volts?

Answer 18

1,500

Question 19

A circuit with a short to voltage may cause

Answer 19

Both improper operation of loads in the circuit and other circuits to malfunction

Question 20

It requires __ volt to push 1 ampere through 1 ohm of resistance.

Answer 20

1

Question 21

An open circuit ___

Answer 21

may be caused by a blown fuse

Question 22

How many watts are consumed by a light bulb if 1.2 amperes are measured when 12 volts are appied?

Answer 22

14.4 watts

Question 23

How many watts are consumed by a light bulb if 1.2 amperes are measured when 12 volts are appied?

Answer 23

14.4 watts

Question 24

A circuit with a short to voltage may cause

Answer 24

Both improper operation of loads in the circuit and other circuits to malfunction

Question 25

A shorted circuit

Answer 25

Neither could include an open circuit nor always causes the fuse to blow

Question 26

High resistance in a circuit

Answer 26

reduces current flow through the circuit

Question 27

Which circuit failure is most likely to cause a fuse to blow?

Answer 27

Short to ground

Question 28

An open electrical circuit has zero ohms resistance. T or F

Answer 28

False

Question 29

If 200 amperes flow from the positive terminal of a battery and operate the starter motor, how many amperes will flow back to the negative terminal of the battery?

Answer 29

200 amperes

Question 30

In a circuit with high resistance ___

Answer 30

electrical loads may still operate but less efficiently

Question 31

In a circuit with high resistance ___

Answer 31

electrical loads may still operate but less efficiently