age 1 of 69
Electrical NCCER test Questions and Answers
In a guardrail system, the guardrails can be made of any of the
following EXCEPT: ......ANSWER........ropebanding
If the potential across the circuit is 48 volts and the current is 5
amps the resistance of the circuit is: ......ANSWER........9.6 ohms
A UL listed rod type grounding electrode must have a minimum
length of: ......ANSWER........8'
What is the MINIMUM number of overload sensing units
required for all three phase motors? ......ANSWER........3
In a circuit of pure capacitance, the current leads the voltage by
an angle of: ......ANSWER........90-degrees
The standard unit for a measuring the cross-sectional area of a
wire is the: ......ANSWER........circular mil
,age 2 of 69
The drawing scale is MOST likely to be found in which of the
following drawing locations? ......ANSWER........the drawing little
block
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........20 ft.
When installing heating cables for anti-icing systems, cable
patters should be in a: ......ANSWER........Serpentine
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: ......ANSWER........is bonded
The PEAK voltage in a nominal 120/208 VAC system is:
......ANSWER........208V.
,age 3 of 69
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 electrician's 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 I
Div I
, age 4 of 69
With a row of 3-4" conduits and 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"
Exposed field-routed electrical conduit SHOULD be installed so
that it: ......ANSWER........is plumb and level
When wiring 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
Which of the following factors is used to control the speed of an
induction motor? ......ANSWER........Frequency
Electrical NCCER test Questions and Answers
In a guardrail system, the guardrails can be made of any of the
following EXCEPT: ......ANSWER........ropebanding
If the potential across the circuit is 48 volts and the current is 5
amps the resistance of the circuit is: ......ANSWER........9.6 ohms
A UL listed rod type grounding electrode must have a minimum
length of: ......ANSWER........8'
What is the MINIMUM number of overload sensing units
required for all three phase motors? ......ANSWER........3
In a circuit of pure capacitance, the current leads the voltage by
an angle of: ......ANSWER........90-degrees
The standard unit for a measuring the cross-sectional area of a
wire is the: ......ANSWER........circular mil
,age 2 of 69
The drawing scale is MOST likely to be found in which of the
following drawing locations? ......ANSWER........the drawing little
block
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........20 ft.
When installing heating cables for anti-icing systems, cable
patters should be in a: ......ANSWER........Serpentine
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: ......ANSWER........is bonded
The PEAK voltage in a nominal 120/208 VAC system is:
......ANSWER........208V.
,age 3 of 69
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 electrician's 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 I
Div I
, age 4 of 69
With a row of 3-4" conduits and 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"
Exposed field-routed electrical conduit SHOULD be installed so
that it: ......ANSWER........is plumb and level
When wiring 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
Which of the following factors is used to control the speed of an
induction motor? ......ANSWER........Frequency
