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NCCER Study Guide-Part 3 Exam Questions with Correct Answers
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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...

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  • September 4, 2024
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  • 2024/2025
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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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