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- 1. Multiple Choice
A portable saw requiring 7.5 amperes of electricity is designed to be used in a 120-volt electrical circuit. How many kilowatts of current does this saw use in 1 hour?
(Formula: W = V × A)
900
500
0.9
0.5
- 2. Multiple Choice
If electricity costs $0.15 per kilowatt-hour, how much does it cost to operate a router that requires 7.5 amperes of electricity and is used in a 120-volt electrical circuit for 2 hours?
(Formula is W = V × A)
$0.27
$0.68
$1.75
$12.31
- 3. Multiple Choice
If an electric motor requires 5 amperes of electricity and is designed to be used in a 120-volt electrical circuit, how many watts of current will that motor use in one hour?
(Formula: W = V × A)
0.25
24
600
900
- 4. Multiple Choice
A fuse is a:
device used to overload a circuit.
device used to protect circuits from an overload of current.
plastic tool used in an ohmmeter.
tool used in place of pliers.
- 5. Multiple Choice
If the local rate for electricity is $0.13 per kilowatt-hour, how much should the electric bill be for 120 kilowatt-hours?
$2.50
$6.80
$10.20
$15.60
- 6. Multiple Choice
What is the amperage rating of an electrical device that uses 8 kilowatts of electricity when operated for 10 hours in a 120-volt circuit?
(Formula: A = W ÷ V)
5.00
5.33
6.67
8.00
- 7. Multiple Choice
A current-carrying conductor not under electrical pressure is a/an:
circuit breaker.
hot wire.
insulator.
neutral wire.
- 8. Multiple Choice
What is the unit of measurement of electrical pressure?
kilowatt
ohm
resistance
volt
- 9. Multiple Choice
What is a device used to protect circuits from an overload of current?
fuse
hot wire
insulator
neutral wire
- 10. Multiple Choice
What is the term to describe the material that stops the transfer of electricity?
conductor
insulator
ohm
watt
- 11. Multiple Choice
How many watts will be used in 10 hours if an electric motor requires 7.5 amperes of electricity and is on a 120-volt electrical circuit?
(Formula: W = V × A)
9
10
2,000
9,000
- 12. Multiple Choice
If the local rate for electricity is $0.10 per kilowatt-hour, how much does it cost to operate an electric motor requiring 10 amperes of electricity when it is used in a 120-volt circuit for 1 hour?
(Formula: W = V × A)
$0.12
$1.20
$12.00
$16.00
- 13. Multiple Choice
What is the amperage of a circuit with ten 60-watt light bulbs in a 120-volt circuit?
(Formula: A = W ÷ V)
5
50
5,000
10,000
- 14. Multiple Choice
A current-carrying conductor under electrical pressure is a/an:
fuse.
hot wire.
insulator.
neutral wire.
- 15. Multiple Choice
What is the watt rating of a portable electric drill with 30 amps and 120 volts? W = V × A
40
600
1,000
3,600
- 16. Multiple Choice
Which material will allow electrons to flow readily?
conductor
insulator
plastic
vinyl
- 17. Multiple Choice
Which electrical device receives only one plug?
15-amp 240-volt receptacle
duplex receptacle
power strip
three-outlet extension cord
- 18. Multiple Choice
Outdoor wire classified as UF is used to:
bury underground as feeder wire.
provide mechanical protection where the wires enter and leave the ground.
provide service inside buildings in areas with moisture.
wire inside lights.
- 19. Multiple Choice
Which material protects from electrical conduction?
copper
plastic
aluminum
iron
- 20. Multiple Choice
NM cable is used:
in places where it has to be waterproof.
inside buildings.
outside buildings.
outside and buried at least 18 inches deep.
- 21. Multiple Choice
If someone is undergoing electrical shock, it is dangerous to touch that person because both people will become:
disconnected from current.
heroes.
insulators.
part of the circuit.
- 22. Multiple Choice
The electrical device that will receive two plugs is a:
240-volt receptacle.
duplex receptacle.
four-way switch.
three-way switch.
- 23. Multiple Choice
What material is a conductor of electricity?
copper
glass
insulation
plastic
- 24. Multiple Choice
Outdoor electrical wire used underground as feeder wire is classified as:
DC.
SE or SEU.
TW.
UF.
- 25. Multiple Choice
The color of the hot electrical wire should be:
black or red.
green or white.
orange or blue.
yellow or brown.
- 26. Multiple Choice
What type of electrical cable has wires covered with paper and vinyl?
armored
conduit
ground-fault interrupter
nonmetallic sheathed
- 27. Multiple Choice
What type of connector is turned onto wires to make a pigtail splice and to insulate the splice in one operation?
glued
soldered
solderless
welded
- 28. Multiple Choice
José is replacing aluminum wire with copper. What size copper wire does he need to carry the same electrical load?
one size larger than the aluminum
one size smaller than the aluminum
the same size as the aluminum
two sizes larger than the aluminum
- 29. Multiple Choice
Toggle, mercury, silent, rocker arm, and push button are types of:
single-pole switches.
three-way switches.
four-way switches.
five-way switches.
- 30. Multiple Choice
Aluminum wire:
is a better conductor than copper wire.
is heavier and more expensive than copper wire.
requires one size larger than copper wire to carry the same amperage.
requires one size smaller than copper wire to carry the same amperage.
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