NCCER ELECTRICAL LEVEL 1 MOD 4
ELECTRICAL THEORY FINAL PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ Which of the following is a 90 degree, explosion proof fitting?
Answer: GUAL
⩥ What is a dropout plate? Answer: Metal plate with a curved surface
for cable to follow as it passes from the tray
⩥ All of the following are common service voltages in the United States
EXCEPT: Answer: 372/575 3-PHASE, 4-WIRE
⩥ What does a GFCI breaker do? Answer: Opens a circuit to prevent
operation of an electrical device
⩥ What will happen when one or more coils in a winding are grounded?
Answer: The motor will automatically blow fuses
⩥ Eight incandescent lighting fixtures are to be installed. Each fixture is
120- volts, with a 200-watt lamp. What is the total connected load?
Answer: 13.3 amps
,⩥ The must be grounded in a bussed gutter if used as the main service
equipment. Answer: Neutral busbar
⩥ When wall mounting cable tray, ensure that Answer: The building
structure is strong enough to support the tray system
⩥ The purpose of sealing cable ends when reels of cable are in storage is
Answer: To keep moisture from creeping in
⩥ The outer covering on liguid-tight flexible metal conduit is used for
Answer: A moisture seal
⩥ A good electrical connection should Answer: Be mechanically and
electrically secure
⩥ The symbol normally used for duplex Answer: Circle with two
parallel lines drawb through it
⩥ Disconnecting means are covered in Answer: NEC Section 110-22
⩥ In relation to switches, the term throw refers to the Answer: Number
of internal operations that a switch can perform
,⩥ A 3-phase, 4-wire, 480v service requires ______ current
transformer(s) Answer: 3
⩥ Services conductors and equipment are covered in Answer: NEC
Article 230
⩥ The NEC required that all receptacles installed on 25 amp and 20 amp
branch circuits be ______ receptacles Answer: Grounding
⩥ A transformer with the primary of 400 turns and a secondary of 300
turns has a _____ Answer: Step-down turns ratio of 4:3
⩥ The circular mil is based on the Answer: Cross-sectional area of the
wire
⩥ Of the termination classes listed below, ____ is the only one that
provides a seal against external elements. Answer: Class 1
⩥ Unless otherwise noted. the calculations in AC circuits _____ values.
Answer: Rms
⩥ When the coil turns are increased the _____ Answer: Induced voltage
is increased
, ⩥ As the temperature surrounding a self-regulating heating cable rises,
the ____ Answer: Resistance of the polymeric core increases
⩥ The motor type that has the highest starting torque is the ____ motor.
Answer: Capacitor-start
⩥ For a given number of poles, the ____ determines the speed of an AC
motor. Answer: Frequency
⩥ Both induction and synchronous motors operate on the principle of a
rotating ____ field Answer: Magnetic
⩥ A transformer has 200 turns in the primary, 150 turns in the secondary,
and 120VAC applied to the primary. The voltage across the secondary is:
Answer: 90Volts
⩥ The output capacity of a motor is rated in Answer: Horsepower
⩥ The synchronous speed at which a pole, 60 Hz induction motor
operates is rpm. Answer: 1,800
⩥ The sine of 0 degree is Answer: 0
⩥ Meters used in AC circuits indicate the Answer: Effective
ELECTRICAL THEORY FINAL PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ Which of the following is a 90 degree, explosion proof fitting?
Answer: GUAL
⩥ What is a dropout plate? Answer: Metal plate with a curved surface
for cable to follow as it passes from the tray
⩥ All of the following are common service voltages in the United States
EXCEPT: Answer: 372/575 3-PHASE, 4-WIRE
⩥ What does a GFCI breaker do? Answer: Opens a circuit to prevent
operation of an electrical device
⩥ What will happen when one or more coils in a winding are grounded?
Answer: The motor will automatically blow fuses
⩥ Eight incandescent lighting fixtures are to be installed. Each fixture is
120- volts, with a 200-watt lamp. What is the total connected load?
Answer: 13.3 amps
,⩥ The must be grounded in a bussed gutter if used as the main service
equipment. Answer: Neutral busbar
⩥ When wall mounting cable tray, ensure that Answer: The building
structure is strong enough to support the tray system
⩥ The purpose of sealing cable ends when reels of cable are in storage is
Answer: To keep moisture from creeping in
⩥ The outer covering on liguid-tight flexible metal conduit is used for
Answer: A moisture seal
⩥ A good electrical connection should Answer: Be mechanically and
electrically secure
⩥ The symbol normally used for duplex Answer: Circle with two
parallel lines drawb through it
⩥ Disconnecting means are covered in Answer: NEC Section 110-22
⩥ In relation to switches, the term throw refers to the Answer: Number
of internal operations that a switch can perform
,⩥ A 3-phase, 4-wire, 480v service requires ______ current
transformer(s) Answer: 3
⩥ Services conductors and equipment are covered in Answer: NEC
Article 230
⩥ The NEC required that all receptacles installed on 25 amp and 20 amp
branch circuits be ______ receptacles Answer: Grounding
⩥ A transformer with the primary of 400 turns and a secondary of 300
turns has a _____ Answer: Step-down turns ratio of 4:3
⩥ The circular mil is based on the Answer: Cross-sectional area of the
wire
⩥ Of the termination classes listed below, ____ is the only one that
provides a seal against external elements. Answer: Class 1
⩥ Unless otherwise noted. the calculations in AC circuits _____ values.
Answer: Rms
⩥ When the coil turns are increased the _____ Answer: Induced voltage
is increased
, ⩥ As the temperature surrounding a self-regulating heating cable rises,
the ____ Answer: Resistance of the polymeric core increases
⩥ The motor type that has the highest starting torque is the ____ motor.
Answer: Capacitor-start
⩥ For a given number of poles, the ____ determines the speed of an AC
motor. Answer: Frequency
⩥ Both induction and synchronous motors operate on the principle of a
rotating ____ field Answer: Magnetic
⩥ A transformer has 200 turns in the primary, 150 turns in the secondary,
and 120VAC applied to the primary. The voltage across the secondary is:
Answer: 90Volts
⩥ The output capacity of a motor is rated in Answer: Horsepower
⩥ The synchronous speed at which a pole, 60 Hz induction motor
operates is rpm. Answer: 1,800
⩥ The sine of 0 degree is Answer: 0
⩥ Meters used in AC circuits indicate the Answer: Effective
