Ch 40 Electrical Circuits and OHMS Law

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) ________.

• short to ground

• short to voltage

• open

• chassis ground

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

• floating ground

• short to ground

• open

• short to voltage

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

• 3

• 36

• 4

• 12

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

• 144 watts

• 10 watts

• 0.10 watt

• 14.4 watts

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

• 150

• 15,000

• 1,500

• 15

High resistance in a circuit can cause ________.

• dim lights

• clicking of relays or solenoids

• slow motor operation

• Any of the above

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

• Remains the same

• Decreases

• Increases

• Cannot be determined

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?

• Zero

• 200 amperes

• About one-half (100 amperes)

• Cannot be determined

What is the symbol for voltage used in calculations?

• A) E

• B) I

• C) R

• D) EMF

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

• Short to voltage

• Open

• High resistance

• Short to ground