CEA Conduit Bending and Installation 2

Question 1

What is the minimum bend radius for 1-inch EMT conduit according to the NEC?

Accepted Answer

6 inches

Answer

The NEC requires a minimum bend radius of 6 times the internal diameter for 1-inch EMT, which equals approximately 6 inches at the inside of the bend.

Question 2

When making an offset bend in conduit, the two bends must be made in:

Accepted Answer

Opposite directions in the same plane

Answer

An offset consists of two equal bends made in opposite directions in the same plane, creating a parallel shift in the conduit run.

Question 3

What tool is used to check that a conduit bend is a true 90 degrees?

Accepted Answer

Any of the above

Answer

A torpedo level, combination square, or speed square can all be used to verify a 90-degree bend is accurate.

Question 4

What is the purpose of applying a 'gain' calculation when bending conduit stubs?

Accepted Answer

To account for the conduit shortening through the bend arc

Answer

Gain is the amount the conduit effectively shortens at the outside of a bend arc, and it must be subtracted from the mark-to-end measurement.

Question 5

Which type of conduit bender is most appropriate for bending large-diameter rigid conduit (2 inches and above)?

Accepted Answer

Hydraulic bender

Answer

Hydraulic benders provide the force needed to bend large-diameter rigid conduit without kinking or flattening.

(CEA) Certified Electrical Apprentice Practice Test

(CEA) Certified Electrical Apprentice Practice Test

CEA Conduit Bending and Installation 2