Ag Mech I- Unit 4.07: Electrical Wiring

Which electrical devices receives only one plug?

• 15-amp 240-volt receptacles

• duplex receptacles

• power strip

• three-outlet extension cord

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

• DC

• SE or SEU

• TW

• UF

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

• SE

• TW

• UF

• USE

Jose 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 aluminum

• the same size as the aluminum

• two sizes larger than the aluminum

A Western Union splice is used:

• in the western part of the United States

• where four or more wires are joined

• where strength is required in a splice

• with wire nuts

Which material protects from electrical conduction?

• copper

• plastic

• aluminum

• iron

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

• the hands are free of oil

• the switches are clean

• water conducts electricity

• water is the universal solvent

NM cable is used:

• in places where is has to be waterproof

• inside buildings

• outside buildings

• outside and buried at least 18 inches deep

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

• armored

• conduit

• ground-fault interrupter

• nonmetallic sheathed

Which material will allow electrons to flow readily?

• conductor

• insulator

• plastic

• vinyl