Journeyman Electrician’s Exam Journeyman Electrician's Conduit Bending 3

Question 1

What is "shrinkage" in the context of conduit offsets?

Accepted Answer

The amount the straight conduit run must be shortened to account for horizontal distance lost in the offset

Answer

The amount conduit shortens when it cools after bending

Answer

The reduction in conduit diameter that occurs at the bend point

Answer

The amount of scrap material produced when cutting conduit

Question 2

For a 45-degree offset, the shrinkage is approximately how much per inch of offset height?

Accepted Answer

0.414 inch

Answer

0.25 inch

Answer

0.577 inch

Answer

0.707 inch

Question 3

What is a "rolling offset" in conduit bending?

Accepted Answer

An offset that travels in two planes simultaneously, both vertically and horizontally

Answer

A bend made by rolling the conduit on the ground to apply even bender pressure

Answer

A series of small incremental bends used to create a smooth curve in one plane

Answer

An offset technique used only for PVC conduit with a heat gun and rolling motion

Question 4

When multiple parallel conduits must all make 90-degree bends while remaining evenly spaced, which bending technique is used?

Accepted Answer

Concentric bending

Answer

Saddle bending

Answer

Reverse bending

Answer

Gain compensation bending

Question 5

For a conduit offset over an 8-inch high obstacle using 45-degree bends, what is the total shrinkage to deduct from the straight conduit run?

Accepted Answer

3.31 inches

Answer

2.00 inches

Answer

2.57 inches

Answer

4.00 inches

Question 6

What type of small offset is used to move conduit into alignment with a panel enclosure or box knockout?

Accepted Answer

Box offset (kick)

Answer

Rolling offset

Answer

4-point saddle

Answer

Concentric bend

Question 7

What is the primary advantage of using 30-degree offset bends instead of 45-degree bends for the same offset height?

Accepted Answer

30-degree bends create a more gradual angle, resulting in less shrinkage and easier conductor pulling

Answer

30-degree bends are faster to execute on the job site

Answer

30-degree bends always require a shorter length of conduit between marks

Answer

30-degree bends are required by NEC for all offsets exceeding 6 inches in height