Conductors and Cables

Which of the following is true of shielding in instrumentation circuits?

• It is grounded at one end only.

• It is not grounded.

• It is grounded by floating the ground at both ends of the wire.

• It is grounded at every instrument.

It is important to do which of the following when conductors are fed into long runs of conduit?

• Fill the conduit with lubricant.

• Hold tension on the spools so that excess wire does not spill onto the floor.

• Make sure the wires are straight and do not cross over each other.

• Put back-tension on the conductors to prevent kinking.

Size 4/0 wire has a _____.

• greater cross-sectional area than size 3/0

• smaller cross-sectional area than size 3/0

• greater resistance than size 3/0

• smaller diameter than size 3/0

Which of the following increases the flexibility of a wire?

• Stranding

• Teflon®

• Linking

• Nylon

Which of the following describes Type TC cable?

• It comes in sizes No. 12 AWG and larger for copper.

• It consists of two or more insulated conductors twisted together and covered with a nonmetallic jacket.

• It has three to five flat conductors separated and enclosed in a flame-retardant assembly.

• It can be installed in a U-channel surface metal raceway with one side open.

Which of the following types of cables may be installed in concealed locations?

• Type NM and NMC

• Type UF and NMC

• Type MC and NM

• Type UF and MC

A grounding wire may be which of the following colors?

• green

• yellow

• black

• white

Which of the following types of cable is suitable for direct burial?

• MC

• NMC

• UF

• NM

The operating temperature of the circuit is a primary factor in the selection of a _____.

• shield drain

• channel wire assembly

• cable

• fixture wire

Which of the following is not shown with cable markings?

• Wire size

• Cable type

• Voltage rating

• Prohibited uses