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1. The NEC® specifies the minimum radius of conduit bends because ________.

bending equipment cannot produce tighter bends

the insulation on conductors could be damaged as it is pulled

installation of additional pull boxes is more efficient

the internal diameter of the conduit may be increased

Question 1 of 20

2. The two dimensions an electrician must know when making a 90° stub bend are the ________.

bend radius and conduit diameter

conduit diameter and rise

take-up distance and conduit diameter

desired rise and take-up distance

Question 2 of 20

3. Which of the following tools is helpful when making multiple bends at the same angle?

Bending shot

Bending gauge

One-shot shoe

Bending protractor

Question 3 of 20

4. What is the developed length for an elbow bend in 5" conduit if the centerline radius is 20"?

39.25"

31.4"

25"

7.85"

Question 4 of 20

5. To prevent a one-shot bending shoe from digging in when bending rigid aluminum, you should ________.

wrap the conduit with rags

operate the hydraulic pump rapidly

coat the shoe with WD-40® or petroleum jelly

use a size larger diameter shoe than the conduit

Question 5 of 20

6. Hydraulic benders are capable of bending rigid pipe up to and including ________.

4" in diameter

6" in diameter

2-1⁄2" in diameter

3" in diameter

Question 6 of 20

7. Springback is a term used to describe the ________.

return of the bender shoe to its normal position after a bend

reaction of a power bender after the machine is jogged

tendency of the conduit to relax to a bend angle slightly less than that indicated on the bender pointer when the bender is released

amount of take-up required for a sweep bend

Question 7 of 20

8. Three-inch rigid conduit is bent using a(n) ________.

speed bender

electric bender

hydraulic bender

mechanical bender

Question 8 of 20

9. How can dog legs be avoided when making offset bends?

By rebending everything for accuracy

By making sure all bends are 6" from the previous bend

By making sure all bends are 90 degrees

By making the two kicks perfectly parallel

Question 9 of 20

10. How much conduit is needed if the rise is 15", the leg length is 10", and the gain is 8.6"?

13.6"

36.4"

16.4"

33.6"

Question 10 of 20

11. Which of the following will produce an offset in a conduit run?

A single change in direction

Improperly calculated sweep bends

A small obstruction being crossed

Two kick bends in opposite directions

Question 11 of 20

12. One of the characteristics of aluminum conduit is that it ________.

has high ground impedance

is lightweight

is easy to bend consistently

corrodes easily

Question 12 of 20

13. When bending smaller sizes of conduit, an advantage can be gained by using which of the following?

Hand bends

Mechanical bending equipment

Electric conduit benders

Bending protractors

Question 13 of 20

14. Which combination of bends between pull points is allowed by the NEC®?

Two elbows, two 45° offsets, and two 15° kicks

Two 60° saddles, an elbow, two 45° offsets, and three 15° kicks

One elbow, one 120° saddle, and two 45° offsets

Two 45° offsets, an elbow, and three 15° kicks

Question 14 of 20

15. What should be the first step in calculating the radius of a bend when the conduit runs are different sizes?

Calculate one-half the outside diameter of the innermost conduit

Calculate the outside diameter of the adjacent conduit

Determine the distance between the two runs of conduit

Determine the radius of the innermost bend

Question 15 of 20

16. A single change in direction of less than 90° is known as a(n) ________.

elbow

offset

kick

saddle

Question 16 of 20

17. What is the developed length for a 15° saddle bend if the centerline radius is 25"?

19.64"

26.57"

39.25"

13.1"

Question 17 of 20

18. According to the NEC®, how many quarter bends are allowed in any one conduit run between outlet boxes?

Question 18 of 20

19. Which of the following is a type of bending shoe?

Segment

Radial

Concentric

Axial

Question 19 of 20

20. When making bends on short lengths of conduit, the shoe may be prevented from creeping by ________.

clamping the conduit

filing a rough surface on the conduit

screwing a coupling onto the conduit

wrapping a rag around the conduit

Question 20 of 20

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