Electrical NCCER test
In a guardrail system, the guardrails can be made of any of the following EXCEPT: - ANS rope banding
If the potential across the circuit is 48 volts and the current is 5 amps the resistance of the circuit is: -
ANS 9.6 ohms
K
A UL listed rod type grounding electrode must have a minimum length of: - ANS 8'
What is the MINIMUM number of overload sensing units required for all three phase motors? - ANS 3
C
In a circuit of pure capacitance, the current leads the voltage by an angle of: - ANS 90-degrees
LO
The standard unit for a measuring the cross-sectional area of a wire is the: - ANS circular mil
The drawing scale is MOST likely to be found in which of the following drawing locations? - ANS the
drawing little block
YC
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: - ANS 20 ft.
When installing heating cables for anti-icing systems, cable patters should be in a: - ANS Serpentine
An auxiliary holding contact (seal-in) on a NEMA starter is indicated by the terminal marking: - ANS
D
A1 & A2
The neutral bus in a sub panel: - ANS is bonded
U
The PEAK voltage in a nominal 120/208 VAC system is: - ANS 208V.
ST
THWN conductors have an outer jacket made of: - ANS nylon
What is shown on a sectional drawing? - ANS 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? - ANS no one.
The MAIN purpose of a revision block on an electrical drawing is to: - ANS note any changes to the
original drawings
, Which of the following is the classified location where combustible vapors are always present? - ANS
class I Div I
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? - ANS 32"
Exposed field-routed electrical conduit SHOULD be installed so that it: - ANS is plumb and level
When wiring control push button control circuit, the auxiliary holding contact (seal-in) is wired with the
start button in: - ANS parallel
K
Ferrous metal raceways, boxes, fittings, and supports must be protected against: - ANS corrosion
C
Which of the following factors is used to control the speed of an induction motor? - ANS Frequency
Electrical hand tools that use a regular 120-volt system MUST be 3-wire grounded UNLESS the: - ANS
LO
tool is double-insulated and is approved by an independent testing facility.
A conductor with 220 mils of insulation would have insulation thickness of: - ANS 0.22"
What is the purpose of sealing cable ends that are in storage? - ANS to keep moisture from entering it
YC
Which one of the fuses is a standard size according to the NEC? - ANS 3
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the secondary full load
amperage? - ANS
D
A megohmmeter will be used to check a cable. The electrician MUST be sure that the circuit is - ANS
de-energized and locked, tagged out, and tested.
U
A protective device for limiting voltage spikes by discharging or bypassing surge current is called a: -
ANS surge limiter
ST
What is the resultant distance between center bends for a 10-inch offset at 15 degrees? - ANS 38.7 In.
What is the symbol for the SECONDARY side of a transformer? - ANS x
The most common transformer found on an industrial site is: - ANS Single phase step down
Applications for heat tracing systems with self regulating control include those requiring a narrow
operating range and: - ANS 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? - ANS 32"
In a guardrail system, the guardrails can be made of any of the following EXCEPT: - ANS rope banding
If the potential across the circuit is 48 volts and the current is 5 amps the resistance of the circuit is: -
ANS 9.6 ohms
K
A UL listed rod type grounding electrode must have a minimum length of: - ANS 8'
What is the MINIMUM number of overload sensing units required for all three phase motors? - ANS 3
C
In a circuit of pure capacitance, the current leads the voltage by an angle of: - ANS 90-degrees
LO
The standard unit for a measuring the cross-sectional area of a wire is the: - ANS circular mil
The drawing scale is MOST likely to be found in which of the following drawing locations? - ANS the
drawing little block
YC
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: - ANS 20 ft.
When installing heating cables for anti-icing systems, cable patters should be in a: - ANS Serpentine
An auxiliary holding contact (seal-in) on a NEMA starter is indicated by the terminal marking: - ANS
D
A1 & A2
The neutral bus in a sub panel: - ANS is bonded
U
The PEAK voltage in a nominal 120/208 VAC system is: - ANS 208V.
ST
THWN conductors have an outer jacket made of: - ANS nylon
What is shown on a sectional drawing? - ANS 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? - ANS no one.
The MAIN purpose of a revision block on an electrical drawing is to: - ANS note any changes to the
original drawings
, Which of the following is the classified location where combustible vapors are always present? - ANS
class I Div I
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? - ANS 32"
Exposed field-routed electrical conduit SHOULD be installed so that it: - ANS is plumb and level
When wiring control push button control circuit, the auxiliary holding contact (seal-in) is wired with the
start button in: - ANS parallel
K
Ferrous metal raceways, boxes, fittings, and supports must be protected against: - ANS corrosion
C
Which of the following factors is used to control the speed of an induction motor? - ANS Frequency
Electrical hand tools that use a regular 120-volt system MUST be 3-wire grounded UNLESS the: - ANS
LO
tool is double-insulated and is approved by an independent testing facility.
A conductor with 220 mils of insulation would have insulation thickness of: - ANS 0.22"
What is the purpose of sealing cable ends that are in storage? - ANS to keep moisture from entering it
YC
Which one of the fuses is a standard size according to the NEC? - ANS 3
A 1000 KVA three phase transformer has a secondary voltage of 208/120. What is the secondary full load
amperage? - ANS
D
A megohmmeter will be used to check a cable. The electrician MUST be sure that the circuit is - ANS
de-energized and locked, tagged out, and tested.
U
A protective device for limiting voltage spikes by discharging or bypassing surge current is called a: -
ANS surge limiter
ST
What is the resultant distance between center bends for a 10-inch offset at 15 degrees? - ANS 38.7 In.
What is the symbol for the SECONDARY side of a transformer? - ANS x
The most common transformer found on an industrial site is: - ANS Single phase step down
Applications for heat tracing systems with self regulating control include those requiring a narrow
operating range and: - ANS 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? - ANS 32"
