WorksheetsNCCER Electrical 2 Module 5
Total questions: 23
Worksheet time: 12mins
Which enclosure is suitable for use in Class 1 hazardous locations?
Type 1
Type 3
Type 4
Type 7
An enclosure installed in a dry residential basement would most likely be a NEMA ______.
Type 1
Type 3
Type 7
Type 9
The first number in the IP classification system designates the degree of protection against _______.
air infiltration
solid objects
fire hazards
water
When attaching metal conduit to an enclosure that contains a bonding jumper, the jumper can be connected to a ___.
standard locknut
plastic locknut
grounding locknut
plastic bushing
A Myers hub is best described as a(n) _____.
gasketed fitting
sealing locknut
setscrew fitting
insulated bushing
The minimum length of a pull box with one 2" conduit and two 1" conduits entering on one side of the box and exiting at a 90* angle on another side of the box is ________. (Assume the system is less than 1,000V.)
14"
16"
18"
24"
For a straight pull, the minimum length for a pull box with two 2" conduits and one 3" conduit is_________. (Assume the system is less than 1,000.)
24"
26"
32"
34"
For a pull box housing shielded conductors carrying over 1,000v the distance between a conductor entry and exit must be ___.
24 times greater than the OD of the conductor
30 times greater than the OD of the conductor
36 times greater than the OD of the conductor
45 times greater than the OD of the conductor
Boxes must be marked with the words "DANGER - HIGH VOLTAGE - KEEP OUT" if they house conductors over _____.
240V
480V
600V
1,000V
Which of the following conduit bodies has a cover opening on both sides ?
Type LB
Type LL
Type LR
Type LRL
Which type of conduit body does NOT provide a change in direction but may be used as a pulling point in a conduit run that has bends totaling more than 360*?
Type C
Type L
Type T
Type X
The abbreviation for an entrance ell (elbow) is _________.
ALB
LLB
ELB
SLB
When installing EMT, a standard square box with a cover can be used as an inexpensive alternative to a_______.
Mogul
Type T conduit body
Myers hub
Entrance cell
To discourage unauthorized entry, handhole enclosure covers must either require tools to open or weigh more than ________.
25 pounds
50 pounds
75 pounds
100 pounds
Which type of conduit body has a raised cover to provide better access to larger conductors for installation and splicing ?
Type C
Type T
Mogul
Pulling ell
An enclosure for use in an area subjected to
regular washdown is _____.
NEMA Type 1
NEMA Type 2
NEMA Type 3
NEMA Type 4
Any ungrounded conductor that enters a raceway,
box, or enclosure must be protected from abrasion
if it is _____.
No. 10 AWG or larger
No. 8 AWG or larger
No. 6 AWG or larger
No. 4 AWG or larger
A 2" raceway runs alongside a 3" raceway into a
junction box with an angled pull. Assuming the
system operates at 600V, the required distance
between these two raceway entries is _____.
14"
24"
20"
32"
An MD 53 raceway runs alongside an MD 78
raceway into a junction box with an angled pull.
Assuming the system operates at 600V, the
required distance between these two raceway
entries is _____.
131 mm
396 mm
521 mm
786 mm
A shielded cable with an OD of 2" enters a junction
box with an angled pull. Assuming the system
operates at 5,000V, the minimum length of the box
_____.
12"
16"
48"
72"
A shielded cable with an OD of 50 mm enters a
junction box with an angled pull. Assuming the
system operates at 5,000V, the minimum length of
the box _____.
1,200 mm
1,600 mm
1,800 mm
4,800 mm
A receptacle in a wet location would most likely be
installed in a(n) _____.
SLB
handhole
mogul
FS box
A handhole enclosure must be _____.
fully sealed on all four sides regardless of type
installed so that excavation is required for
access
reinforced with iron rebar
provided with a cover that weighs over 100 lbs
(45 kg) or requires tools to open
