NCCER Study Guide-Part 3 Exam Questions with Correct Answers
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Course
NCCER Electrical
Institution
NCCER Electrical
in a guardrail system; the guardrail can be made of any of the following except? - Answer-Rope banding
What is type USE cable primarily used for? - Answer-Direct burial in the earth
Electrical gloves should be inspected before each use to determine: - Answer-The maximum voltage they can stand...
NCCER Study Guide-Part 3 Exam
Questions with Correct Answers
in a guardrail system; the guardrail can be made of any of the following except? -
Answer-Rope banding
What is type USE cable primarily used for? - Answer-Direct burial in the earth
Electrical gloves should be inspected before each use to determine: - Answer-The
maximum voltage they can stand.
Which of the following is the classified location where combustible fibers are always
present? - Answer-Class 3, Division 1
As the load decreases on a squirrel cage induction motor; its power factor: - Answer-
increases
When installing 4/0 and larger cables in a cable tray; the tray width must not be less
than the sum of the cable: - Answer-Diameters
All multimeters are capable of measuring: - Answer-Current, voltage, and resistance
What is the resultant distance between center bends for a 10 - inch offset at 15
degrees? - Answer-38.7 inches
A current transformer has a rating of 4000:5. If 2000 amps loads is on the primary; the
secondary output would produce : - Answer-2.5 amps
What is the approximate developed length of a 40" radius 90° bend? - Answer-(DL =
1.57 × Radius)63"
A megohmmeter will be used to check a cable. The electrician must be sure that the
circuit is - Answer-de energized and locked, tagged out, and tested
Which of the following factors is used to control the speed of an induction motor ? -
Answer-Frequency
Electrical hand tools that use a regular 120v system must be 3 wire grounded unless
the : - Answer-Tool is double insulated and is approved by an independent testing
facility
If the potential across a circuit is 48 volts and the current is 5 amps the resistance of the
current is? - Answer-9.6 ohms
,the drawing scale is most likely to be found in which of the following drawing locations?
- Answer-the drawing title block
A UL listed rod type grounding electrode most have a minimum length of? - Answer-8"
What is the minimum number of overload sensing units required for all three phase
motor? - Answer-3
In a circuit of pure capacitance; the current leads the voltage by an angle of? - Answer-
90 degrees
The standard unit for measuring the cross-sectional area of wire is the? - Answer-
circular mil.
The length of a bare copper conductor in a ground ring must be buried no less than 2.5
" below grade and with a length of at least? - Answer-20ft
When installing heating cables for anti-icing systems; cable patterns should be in a? -
Answer-serpentine pattern
An auxiliary holding contact ( seal - in) on a NEMA starter is indicated by the terminal
marking ? - Answer-A1 & A2
The neutral bus in a sub panel is: - Answer-bonded
The peak voltage in a nominal 120/208 VAC system is : - Answer-208 V
THWN conductors have an outer jacket made of : - Answer-nylon
What is shown on a sectional drawing? - Answer-cutaway view of a building
Who is allowed to remove another electricians tag or lock from any valve;switch;or piece
of equipment without proper authorization? - Answer-no one
The main purpose of a revision block on an electrical drawing is to - Answer-Note any
changes to the original drawings
Which of the following is the classified location where combustible vapors are always
present? - Answer-Class 1 , Division 1
Exposed field-rounted electrical conduit should be installed so that it is - Answer-plumb
and level
When wiring a 3- wire control push button control circuit; the auxiliary holding contact
(seal-in) is wired with the start button in : - Answer-parallel
, Ferrous metal raceways ;boxes ; fittings; and supports must be protected against: -
Answer-corrosion
With a row of 3 -4" conduits and a second row of 3 -2" and 2 -1" conduits for an angle
pull box; what is the minimum distance between the opposite walls of the pull box ? -
Answer-32"
A conductor with 220 mils of insulation would have insulation thickness of - Answer-
0.22"
A protective device for limiting voltage spikes by discharging or bypassing surge current
is called a : - Answer-surge limiter
Which one of the fuses is a standard size according to the NEC? - Answer-3
What is the symbol for the secondary side of a transformer? - Answer-X
The most common transformer found on an industrial site is: - Answer-Single phase
step down
Applications for heat tracing systems with a self regulating control include those
requiring a narrow operating range and : - Answer-Temperature sensitive fluids
With a row of 3 -4" conduits and second row of 3 -2" and 1-1" conduits on each side for
a straight pull box what is the minimum distance between the opposite walls of the pull
box? - Answer-32"
When installing cables smaller than 4/0 in a cable tray; the allowable cable fill area must
not be less than the sum of the cable : - Answer-cross-sectional areas
The meter used to measure pulling tension is known as a : - Answer-dynamometer
On a push button; normally closed contacts are generally used to open a circuit to : -
Answer-initate a stop or off circuit function
How should heat shrink insulators be installed? - Answer-The insulator should be
slipped over the connector and heat should be applied for a few seconds
The conductor used to connect the system grounded conductor or the equipment to
grounding electrode or to a point on the grounding electrode system is called a: -
Answer-grounding electrode conductor
A material with poor electrical conducting properties is a: - Answer-good insulator
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the
secondary full load amperage? - Answer-4817
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