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C 10 Electrical Exam Part V Graded A+
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C 10 Electrical Exam Part V Graded A+
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C 10 Electrical Exam Part V Graded A+The total equivalent bend in rigid conduit between pull points (outlet to outlet, fitting to
fitting, or outlet to fitting) shall not exceed _____.
A-3 quarter bends (270 degrees)
B-4 quarter bends (360 degrees)
C-5 quarter bends (450 degrees)
D-6 quarter bends (540 degrees) - ANSWER-The Correct Answer Is B
Two 45 degrees bends plus three 90 degrees bends equals the maximum of 360
degrees total.
When a branch circuit feeds both noncontiguous and continuous loads, the circuit must
be sized to accommodate 100 percent of the noncontiguous load plus what percent of
the continuous load?
A-110 percent
B-115 percent
C-120 percent
D-125 percent - ANSWER-The Correct Answer Is D
The rating of branch circuits serving continuous loads shall be not less than the
noncontiguous load plus 125 percent of the continuous load.
The branch-circuit load for a single 12-kilowatt (12 kW) electric range in a dwelling is
_____.
A-8 kW
B-9 kW
C-10 kW
D-11 kW - ANSWER-The Correct Answer Is A
NEC Table 220.4(C) permits an electric range with a kW nameplate rating not
exceeding 12 kW to be rated at 8kW when sizing branch circuits and feeders.
A 20-ampere laundry circuit is always required in each _____.
A-industrial wash room
B-commercial utility room
C-dwelling unit
D-motel unit - ANSWER-The Correct Answer Is C
In dwelling units, at least one 20 amp branch circuit shall be installed for the laundry.
How many receptacles are required in a residential hallway 12 feet in length?
A-1
B-2
C-3
D-4 - ANSWER-The Correct Answer Is A
NEC Section 210.52(H) requires at least one receptacle outlet in hallways 10 feet or
more in length.
,How many receptacle outlets are required in a residential garage?
A-4
B-3
C-2
D-1 - ANSWER-The Correct Answer Is D
At least one receptacle outlet to be installed in each basement and in each attached
garage, or in each detached garage with electric power.
A 125-volt single phase, 15- or 20-ampere receptacle must be installed in _____ for the
servicing of heating, air conditioning and refrigeration equipment?
A-all apartment buildings
B-one- and two-family dwellings
C-commercial buildings
D-all locations - ANSWER-The Correct Answer Is D
Receptacle outlets are required for equipment in any location the equipment is present.
The NEC has removed the exception for equipment on rooftops of one- and two-family
dwellings.
How many lighting outlets must be installed at or near heating, air-conditioning, and
refrigeration equipment in attics or crawl spaces?
A-1
B-2
C-3
D-4 - ANSWER-The Correct Answer Is A
NEC Sections 210.70(A) and(C) require at least one switched lighting outlet in these
spaces.
Feeders containing a common neutral are permitted to supply how many sets of 3-wire
feeders?
A-1 or 2
B-5 or 6
C-3 or 4
D-2 or 3 - ANSWER-The Correct Answer Is D
NEC Section 215.4(A) permits two or three sets of 3-wire feeders.
Feeders containing a common neutral are permitted to supply how many sets of 4-wire
feeders?
A-2
B-3
C-4
D-5 - ANSWER-The Correct Answer Is A
NEC Section 215.4(A) permits two sets of 4-wire feeders.
Feeders containing a common neutral are permitted to supply how many sets of 5-wire
feeders?
A-1
, B-2
C-3
D-4 - ANSWER-The Correct Answer Is B
NEC Section 215.4(A) permits a common neutral to supply two sets of 5-wire feeders.
On a 4-wire, delta-connected secondary where the midpoint of one phase is grounded
to supply lighting and similar loads, what color must the conductor having the highest
voltage be?
A-Yellow
B-Red
C-Orange
D-Blue - ANSWER-The Correct Answer Is C
NEC Section 215.8 requires that this conductor must be identified by an outer finish that
is orange or by tagging or other effective means.
Which one of the following voltages is not standard?
A-120/275
B-480Y/277
C-120/240
D-600Y/347 - ANSWER-The Correct Answer Is A
NEC Section 220.2 lists the common voltages as 120, 120/240, 208Y/120, 240, 347,
480Y/277, 480, 600Y/347 and 600
Where a feeder conductor supplies continuous loads, the rating of the overcurrent
device shall not be less than the non-continuous load plus what percent of the
continuous load?
A-100 percent
B-110 percent
C-125 percent
D-150 percent - ANSWER-The Correct Answer Is C
NEC Section 215.2 requires 125 percent.
In a balanced three-phase, 4-wire system, the current in the neutral conductor _____.
A-is the same as in the other conductors
B-is lower than in the other conductors
C-is higher than the other conductors
D-will not flow when all loads are exactly balanced - ANSWER-The Correct Answer Is D
The grounded or neutral conductor carries only the unbalanced load. If a single-phase,
120/240-volt service carries 100 amperes on phase A, and 80 amperes on phase B, the
neutral would carry only 20 amperes, the difference between the current in phase A and
that in phase B.
On a 240-volt, single-phase, 3-wire system, the neutral conductor will _____.
A-never carry current even when the other conductors carry a different amount
B-never carry current larger than the difference between the current in the two
ungrounded (hot) conductors
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