WorksheetsConduit Bending 26204
Total questions: 20
Worksheet time: 10mins
Dog legs can be avoided when making offset bends by _____.
maintaining the centerline for all bends
making sure all bends are 90 degrees
making sure all bends are 6" from the previous bend
rebending everything for accuracy
When making bends on short lengths of conduit, the shoe may be prevented from creeping by
clamping the conduit
screwing a coupling onto the conduit
filing a rough surface on the conduit
wrapping a rag around the conduit
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
A 30° kick has a hypotenuse of 10". Given that the cosecant of 30° is 2, determine the side opposite or how far off the surface the end of the kick needs to be.
5"
10"
15"
20"
The two dimensions an electrician must know when making a 90° stub bend are the _____.
conduit diameter and rise
bend radius and conduit diameter
desired rise and take-up distance
take-up distance and conduit diameter
Hydraulic benders are capable of bending rigid pipe up to and including
2-1/2" in diameter
3" in diameter
4" in diameter
5" in diameter
A single change in direction of less than 90° is known as a(n) ____.
saddle
elbow
kick
One of the characteristics of aluminum conduit is that it ____.
is easy to bend consistently
has high ground impedance
corrodes easily
When making concentric bends in conduit of different sizes, the first step in calculating the radius of a bend is to ____.
calculate one-half the outside diameter of the innermost conduit
determine the distance between the two runs of conduit
calculate the outside diameter of the adjacent conduit
Which of the following is a type of bending shoe?
Concentric
Radial
Segmented
Axial
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
angle when the bender is
released
mount of take-up required for a sweep bend
Which combination of bends between pull points is allowed by the NEC®?
Three elbows, two 45° offsets, and two 15° kicks
One elbow, one 120° saddle, and two 45° offsets
Two 60° saddles, an elbow, two 45° offsets, and three 15° kicks
Two 45° offsets, an elbow, and three 15° kicks
What is the developed length for an elbow bend in 5" conduit if the center line radius is 20"?
7.85"
25"
31.4"
39.25"
The NEC® specifies the minimum radius of conduit bends because _____.
installation of additional pull boxes is more efficient
bending equipment cannot produce tighter bends
the insulation on conductors could be damaged as it is pulled
the internal diameter of the conduit may be increased
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"
You are making a 14" stub-up in 1" RMC and the bender deduct is listed as 10". Where do you make your first mark?
1" from the end of the conduit
4" from the end of the conduit
5" from the end of the conduit
6" from the end of the conduit
Which of the following is true when joining PVC conduit?
The cementing and joining operation should not exceed 20 seconds.
Deburring is not necessary with PVC.
PVC must be cut using a special PVC saw.
When joining PVC, avoid rotating the conduit after it has been inserted into the fitting.
PVC expansion couplings are seldom required in _____.
any installation
outdoor installations
long conduit runs
underground installations
You are making a 15" offset with two 30° bends with an offset multiplier of 2. The distance between bends is _____.
7.5"
15"
22.5"
30"
A conduit run must pass over a pipe and then over a rectangular duct. This will require a total of _____.
three bends
five bends
seven bends
nine bends
