ag mechanics electrical wiring

What type of electrical cable has wires covered with paper and vinyl?

• Armored
• Conduit
• Ground-fault interrupter
• Nonmetallic sheathed

Indoor electrical wire used to provide service in areas with moisture or without moisture is classified as:

• SE
• TW
• UF
• USE

Outdoor wire classified SE or SEU is used to:

• bring electrical service into buildings.
• bury underground as feeder wire.
• provide mechanical protection where the wires enter and leave the ground.
• provide service in inside buildings in areas with moisture.

Outdoor electrical wire used underground as feeder wire is classified as:

• DC.
• SE or SEU.
• TW
• UF.

Aluminum wire:

• is a better conductor than copper wire.
• is heavier and more expensive than copper
• requires one size larger than copper to carry the same amperage.
• requires one size smaller than copper to carry the same amperage.

The color of the hot electrical wire should be:

• black or red.
• green or white.
• orange or blue.
• yellow or brown.

A device that automatically trips and opens the circuit when too much current passes through it is a:

• circuit breaker.
• circuit tester.
• single-pole switch.
• three-way switch.

The electrical device that will receive two plugs is a:

• 240 volt receptacle.
• duplex receptacle.
• four-way switch.
• three-way switch.

NM cable is used:

• in places where it has to be waterproof.
• inside buildings
• outside buildings
• outside and buried at least 18 inches deep.

Touching electrical switches or receptacles with wet hands may cause electrical shock because:

• hands are free of oil
• switches are clean
• water conducts electricity
• water is universal solvent.