NCCER ELECTRICAL LEVEL 1 MOD 4
ELECTRICAL THEORY REVIEW SHEET 2026
PRACTICE SOLUTIONS GRADED A+
⩥ 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
⩥ 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.
⩥ 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.
ELECTRICAL THEORY REVIEW SHEET 2026
PRACTICE SOLUTIONS GRADED A+
⩥ 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
⩥ 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.
⩥ 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.
