NCCER Electrical 2 Module 7

Which of the following provides a curved surface for the cable to follow as it passes from the tray?

• Swivel plate

• Splice plate

• Barrier plate

• Dropout plate

A cable hanger elbow is used to ___.

• Support piping

• Divide a section of cable tray

• Suspend cables in long vertical runs

• Make vertical offsets

The most desirable method of exiting cable from a cable tray is ___.

• Simply piping

• From the end of the tray using a dropout plate

• From the end of the tray without a dropout plate

• Between rungs between without a dropout plate

What kind of mounting is often used in tunnels and other underground installations?

• Direct rod mounting

• Wall mounting

• Trapeze mounting

• Center-hung mounting

The method of supporting cable trays using threaded rods and hanger clamps is known as ___.

• Wall mounting

• Pipe rack mounting

• Direct rod suspension

• Center rail support

Which of the following occurs when the load applied causes the fibers on the tension side of the rung to stretch and permanently deform

• Top-edge failure

• Longitudinal failure

• Transverse failure

• Side-rail failure

The expected weight of an installed cable tray system is 200 pounds. Each support must be capable of carrying ___.

• 200lbs

• 250lbs

• 300lbs

• 350lbs

All multi conductor cables operating at or above 1,000v must be separated by a solid divider from cables operating under 1,000v, Except for ___.

• Type UF

• Type USE

• Type MC

• Type NM

Cable tray in a corrosive location is most often constructed of _____.

• Nonmetallic material

• Steel

• Aluminum

• Copper

Symbols used to show cable tray systems on working drawings are explained in the ___.

• Detail drawings

• Isometric

• NEC

• Legend