MASTER OPENBOOK EXAM #8

In damp or wet locations, cabinets and cutout boxes of the surface type shall be mounted so there is at least ___ air space between the enclosure and the wall or other supporting surface.

• 6.35”

• 6”

• 3/4”

• 1/4”

An 86 cubic inch junction box has two 1/2” rigid metal conduits entering the box. The conduits are supported within 36” of the box. The conduits enter the box through threaded hubs, one conduit through the top of the box. Select the correct statement concerning the Code requirements for this type of installation.

• The conduits must be supported within 18” of the box.

• The conduits must be supported within 12” of the box.

• The Code requires this box to be supported.

• The Code does not require this box to be supported.

The disconnecting means shall be ___ of the sign or outline lighting that it controls.

 

I. within sight of sign                      II.  within 50’ of sign                       III. within 75’ of sign

• I only

• II only

• I and II only

• I and III only

The thermoplastic insulation for fixture wires may be deformed at ___ temperature where subjected to pressure, requiring care to be exercised during installation and at points of support.

I. 0 degrees F                    II. 72 degrees F                 III. 212 degrees F

• I only

• II only

• III only

• II and III only

The installation of underfloor raceways shall be permitted.

 

I.       beneath the surface of concrete

II.     beneath floor material other than concrete

III.    where laid flush with the concrete floor and covered with linoleum

• I only

• II only

• III only

• I, II and III

FCC carpet squares that are adhered to the floor shall be attached with ___.

• tacking strip

• release-type adhesive

• glue

• none of these

Electric equipment with a metal enclosure or with a nonmetallic enclosure listed for the used and having adequate ___ producing characteristics. And associated wiring material suitable for the ambient temperature shall be permitted to be installed in other space used for environmental air unless prohibited in this Code.

I. fire-resistant                  II. low-smoke

• I or II

• I and II

• I only

• II only

Conductors shall be ___ to provide ready and safe access in the underground and subsurface enclosures, into which persons enter for installation and maintenance.

• readily accessible

• exposed

• racked

• enclosed

What is the ampacity of four #6 THW copper current-carrying conductors enclosed in schedule 80 PVC conduit, 8 feet in length entering a trench?

• 65 amps

• 52 amps

• 44 amps

• 40 amps

Control circuit devices with screw type pressure terminals used with a used with a #14 or smaller copper conductors shall be torque to a minimum of ___ pound-inches unless identified for a different torque value.

• 5

• 6

• 7

• 8