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Ag. Mech I Electricity
Terms in this set (44)
What is a device used to protect circuits from an overload of current?
A. Fuse **
B. Hot wire
D. Neutral wire
A current-carrying conductor under electrical pressure is a/an:
B. Hot wire. **
D. Neutral wire.
A current-carrying conductor NOT under electrical pressure is a/an:
A. Circuit breaker.
B. Hot wire.
D. Neutral wire. **
A fuse is a:
A. Device used to overload a circuit.
B. Device used to protect circuits from an overload of current. **
C. Plastic tool used in an ohm meter.
D. Tool used in place of pliers.
Term for the measurement of electrical power?
D. Watt **
What is the term to describe the material that will NOT conduct electricity?
B. Insulator **
Term for the measurement of electrical pressure?
D. Volts **
What is the term to describe the rate of flow of electricity?
A. Ampere **
How many watts make up a kilowatt?
D. 1000 **
What is the watt rating of a portable electric drill with 30 amps and 120 volts? W = V x A
D. 3600 **
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 is A = W/V
C. 6.67 **
How many kilowatts of current does a portable saw that requires 7.5 amperes of electricity and is designed to be used in a 120-volt electrical circuit use in one hour? W = V x A
C. 0.9 **
If electricity costs $0.15 per kilowatt hour, how much does it cost to operate a router which requires 7.5 amperes of electricity and is used in a 120 volt electrical circuit for 2 hours? Formula is W = Vx A
A. $0.27 **
How many watts of current does an electric motor which requires 5 amperes of electricity and is designed to be used in a 120 volt electrical circuit use in one hour?
C. 600 **
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 if used in a 120 volt circuit for one hour? W=VxA
A. $0.12 **
What is the amperage of a circuit with ten 60watt light bulbs in a 120-volt circuit? Formula: A = W/V
A. 5 **
An agricultural mechanics shop has five 200 watt lights, a 600-watt saw and a 100-watt fan that were used for 5 hours. How many KILOWATTS of electricity were used?
B. 8.5 **
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 10 hours? Formula W = V x A
D. 9,000 **
If the local rate for electricity is $.13 per kilowatt hour, how much should the electric bill be for 120 kilowatt hours?
D. $15.60 **
Electricians wear shoes or boots with rubber heels to:
A. Insulate against shock. **
B. Keep their feet warm.
C. Save money.
D. Save time.
How does the Underwriters Laboratory (UL) help with electrical safety?
A. Offers classes on do-it-yourself wiring
B. Provides insulated boots to electrical workers
C. Tests electrical materials **
D. Trains electrical inspectors
Touching electrical switches or receptacles with wet hands may cause electrical shock because:
A. Hands are free of oil.
B. Switches are clean.
C. Water conducts electricity. **
D. Water is universal solvent.
If someone is undergoing electrical shock, it is dangerous to touch that person because both people will become:
A. Disconnected from current.
D. Part of the circuit. **
The type of electrical cable that has copper wires covered with paper and vinyl is:
C. Ground-fault interrupts.
D. Nonmetallic sheathed. **
A device that automatically trips and opens the circuit when too much current passes through it is a:
A. Circuit breaker. **
B. Circuit tester.
C. Single-pole switch.
D. Three-way switch.
Which electrical device receives ONLY one plug?
A. 15 amp 240 volt receptacle. **
B. Duplex receptacle.
C. Four-way switch.
D. Three-way switch.
The electrical device that will receive two plugs is:
A. 240 volt receptacle.
B. Duplex receptacle. **
C. Four-way switch.
D. Three-way switch.
What type connector is turned on to wires to make a pigtail splice and to insulate the splice in one operation?
C. Solderless **
Allows electrons to flow readily through it:
A. Conductor. **
Material that will NOT conduct electricity is a/an:
B. Insulator. **
The color of the hot electrical wire should be:
A. Black or red. **
B. Green or white.
C. Orange or blue.
D. Yellow or brown.
What material is a conductor of electricity?
A. Copper. **
Indoor electrical wire used to provide service in areas with or without moisture is classified as:
B. TW. **
Outdoor electrical wire used underground as feeder wire is classified as:
B. SE or SEU.
D. UF. **
NM cable is used:
A. In places where it has to be waterproof.
B. Inside buildings. **
C. Outside buildings.
D. Outside, buried at least 18 inches deep.
How many traveler wires should be used for two three-way switches?
D. Two **
A rat tail splice is used:
A. Every two inches.
B. Every two feet.
C. Inside junction boxes. **
D. On rats.
Toggle, mercury, silent, rocker arm, and push button are types of:
A. Single pole switches. **
B. Three-way switches.
C. Four-way switches.
D. Five-way switches.
When using two three-way switches and one four-way switch, how many traveler wires should be used?
C. Four **
A. Is a better conductor than copper wire.
B. Is heavier and more expensive than copper.
C. Requires one size larger than copper to carry the same amps. **
D. Requiring one size smaller than copper to carry the same amps.
Outdoor wire classified SE or SEU is used to:
A. Bring electrical service into buildings. **
B. Bury underground as feeder wire.
C. Provide mechanical protection where the wires enter and leave the ground.
D. Provide service in inside buildings in areas with
Jose is replacing aluminum wire with copper. What size copper wire does he need to carry the same electrical load?
A. One size larger than the aluminum.
B. One size smaller than the aluminum. **
C. The same size as the aluminum.
D. Two sizes larger than the aluminum.
A western union splice is used:
A. In the western part of the U.S.
B. Where four or more wires are joined.
C. Where strength is required in a splice. **
D. With wire nuts.
What type of wire splice is used in junction boxes?
B. Rat tail **
C. Square knot
D. Western Union
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