Module 26108-23 Review Questions for Electrical and Wiring Concepts

EMT

The latest duty and least costly type of metal conduit is

EMT

which of the following is often referred to as thin walled conduit

EMT

NEC Article 358 covers ____

galvanized

to resist corrosion in wet environments, EMT is

steel or aluminum

RMC is made of​ _____.

PVC

a type of conduit that is noncorrosive, chemically inert and non-aging is

if requires the use of expansion joints to avoid damage due to temp changes

which of the following is true with regard to PVC

FMC

a type of conduit used to connect machines that vibrate during operation

four 90 degree bends

which of the following is an acceptable combination of conduit bends

bushing

the fitting used to protect conductors from the sharp edges of co suit where it entered a box

no. 4 AWG or larger

underground conductors entering a raceway must be protected by bushings when they are sized

Offset Nipple

to connect two pieces of electrical equipment in close proximity where a slight offset is required, use a fitting known as

the back

a type LB conduit body has a cover on

Type C

a type of conduit body used to provide a pull point on an straight conduit

type x

A type of conduit body used at four intersecting conduits is​ _____.

a type of conduit body that has a cover on both sides is

type LRL

3/4 ''

where metal conduit is to be installed is a wet location a clamp back strap

6''

maximum depth of a box made, especially for use in concrete construction is

You must know the thickness of the finish service before installing the boxes

Which of the following is true installing boxes in a metal stud environment

nail plates

which is required by NEC section 300.4 to protect conductors and notched wooden members.

Concrete

Hammer set anchors are designed for use in

75% of the cross-sectional area of the wire way

NEC section 376.56 Limits Wire Way, Fill no more than.

20% of the interior cross-section of the wire way

The cross-sectional areas of all conductors, at any cross-section of a wire weigh shall not exceed

pancake raceways

Raceways designed to extend conductors across the floor without embedding them in the floor is called

Bonded

Most electrical equipment that has a metal frame must be

Rain tight

installing EMT in a wet location what type of fittings must be used?

75%

conductors along with spices in tabs must not fill a wire way to more than one of its cross-sectional area

NEC Article 392

Which of the following covers the installation requirements for cable tray?

False

IMC conduit has the same internal diameter as RMC, true or false

FMC can be connected to RMC using what coupling

Combination

Type DB schedule 80

What type of PVC may be installed? Were exposed to physical damage.

type T

what type of conduit body is used to provide a junction point for three intersection conduits

1/4 inch

when installing metal to conduit in a wet area, what space must be provided between it in the supporting surface

Reduced vultures drop

conductors installed in PVC are subject to a(n)

12 inches

Flexible metal conduit must be supported within

telephone or sound wiring

Special light-duty center-rail cable tray is most often used for _____.

pipe rack mounting

The type of cable tray support most likely to be used when power distribution and electrical wiring is routed over a large outdoor area is _____.

use two people

When moving long pieces of raceway, it is best to _____.

spectate it from non compatible materials

when storing raceway it is best to?t