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

has high ground impedance

is easy to bend consistently

corrodes easily

is lightweight

Question 1 of 20

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

39.25"

13.1"

26.57"

19.64"

Question 2 of 20

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

7.85"

39.25"

31.4"

25"

Question 3 of 20

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

Question 4 of 20

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

Mechanical bending equipment

Bending protractors

Hand bends

Electric conduit benders

Question 5 of 20

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

bend radius and conduit diameter

desired rise and take-up distance

conduit diameter and rise

take-up distance and conduit diameter

Question 6 of 20

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

Improperly calculated sweep bends

Two kick bends in opposite directions

A small obstruction being crossed

A single change in direction

Question 7 of 20

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

13.6"

16.4"

33.6"

36.4"

Question 8 of 20

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

electric bender

hydraulic bender

mechanical bender

speed bender

Question 9 of 20

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

Segment

Axial

Radial

Concentric

Question 10 of 20

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

use a size larger diameter shoe than the conduit

wrap the conduit with rags

coat the shoe with WD-40® or petroleum jelly

operate the hydraulic pump rapidly

Question 11 of 20

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

Bending protractor

One-shot shoe

Bending gauge

Bending shot

Question 12 of 20

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

the internal diameter of the conduit may be increased

the insulation on conductors could be damaged as it is pulled

installation of additional pull boxes is more efficient

bending equipment cannot produce tighter bends

Question 13 of 20

14. 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 14 of 20

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

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

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

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

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

Question 15 of 20

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

wrapping a rag around the conduit

screwing a coupling onto the conduit

filing a rough surface on the conduit

clamping the conduit

Question 16 of 20

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

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

By rebending everything for accuracy

By making sure all bends are 90 degrees

By making the two kicks perfectly parallel

Question 17 of 20

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

reaction of a power bender after the machine is jogged

amount of take-up required for a sweep bend

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

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

Question 18 of 20

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

offset

elbow

kick

saddle

Question 19 of 20

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

Calculate the outside diameter of the adjacent conduit

Calculate one-half the outside diameter of the innermost conduit

Determine the radius of the innermost bend

Determine the distance between the two runs of conduit

Question 20 of 20

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