PRACTICE TEST PSI
REVIEWED GUIDE
QUESTIONS AND
CORRECT ANSWERS
GRADED A+ 2025-2026
The service disconnecting means may be installed in all of the following EXCEPT - ANS-
the bathroom.
What is the minimum size EMT conduit required for three 14 AWG, six 12 AWG, and
three 8 AWG conductors? All wires are THHN solid wire. - ANS-1 inch
Overcurrent protection for feeders branch circuits supplying electric vehicle supply
equipment shall be sized for continuous duty and shall have a rating of not less than
what percentage of the maximum load of the electric vehicle supply equipment? - ANS-
125%
A continuous load is a load where the maximum current is expected to continue for at
least how long? - ANS-3 hours
The ampacity of the conductors from the generator terminals to the first distribution
device(s) containing overcurrent protection shall not be less than what percentage of
the nameplate current rating? - ANS-115%
ENT shall not be - ANS-threaded.
A panelboard for a mobile home shall be rated not less than which of the following? -
ANS-50 amperes
,Disregarding exceptions, liquidtight flexible metal conduit shall be supported and
secured at intervals not to exceed - ANS-4 1/2 feet.
What is the maximum weight of a luminaire that can be supported by the screw shell
of a lampholder? - ANS-6 pounds
Disregarding exceptions, what is the minimum size copper-clad aluminum
underground service conductor permitted? - ANS-6 AwG
The base of a 24-foot non-self-supporting ladder shall be placed approximately how
far from the vertical structure upon which is leaning? - ANS-6 feet
Alternating-current systems of less than 50 volts shall be grounded where supplied by
transformers, if the transformer supply system exceeds which of the following? - ANS-
150 volts to ground
What is the maximum distance that the emergency controls for an attended self-
service motor fuel dispensing facility shall be located from the dispensers? - ANS-100
feet
Where the negative polarity of a dc system does not serve as the connection point for
the grounded conductor, which color finish can be used to identify the negative
ungrounded conductor? - ANS-black
One horsepower is equal to how many watts? - ANS-746
The conductors, including splices and taps, shall not fill the wireway to more than
what percentage of its area? - ANS-75%
outlet for a 12 AWG conductor with a listed outlet branch-circuit type arc-fault circuit
interrupter installed at the first outlet What is the maximum permitted length of the
branch-circuit wiring from the branch-circuit overcurrent device to the first box? - ANS-
70 feet
, Which type of surge protection device is permanently connected and intended for
installation between the secondary of the service transformer and the line side of the
service disconnect overcurrent device? - ANS-Type 1
What is the power of a 4-ohm resistive load connected to a 120-volt power supply? -
ANS-120v/4ohm=3OA 30X120V= 3600w
Approximately how many kilowatts are used by a three -phase, 480- voit ac motor that
draws a current of 52 amperes and has a power factor rating of 88 % - ANS-480v x 52a
x 1.735= 43180W x .88= 38000w
What is the greatest root-mean-square (effective) difference of potential between any
two conductors of a circuit defined as? - ANS-voltage
A resistor has the following colored bands (in order): orange, red, brown, silver. What
is the resistor value? - ANS-320 Ohms (10% tolerance)
What is the formula for calculating power (watts)? - ANS-R x I 2
One horsepower is equal to how many watts? - ANS-746
A continuous load is a load where the maximum current is expected to continue for at
least how long? - ANS-3 hours
For other than a totally enclosed switchboard or switchgear, what is the minimum
amount of space that shall be provided between the top of the unshielded switchboard
or switchgear and any combustible ceiling? - ANS-36"
What is the required width of the working space in front of electrical equipment with a
22-inch width? - ANS-30 inches
What is the minimum fire rating for electrical vaults housing electrical equipment over
600 volts, nominal? - ANS-3 hours
REVIEWED GUIDE
QUESTIONS AND
CORRECT ANSWERS
GRADED A+ 2025-2026
The service disconnecting means may be installed in all of the following EXCEPT - ANS-
the bathroom.
What is the minimum size EMT conduit required for three 14 AWG, six 12 AWG, and
three 8 AWG conductors? All wires are THHN solid wire. - ANS-1 inch
Overcurrent protection for feeders branch circuits supplying electric vehicle supply
equipment shall be sized for continuous duty and shall have a rating of not less than
what percentage of the maximum load of the electric vehicle supply equipment? - ANS-
125%
A continuous load is a load where the maximum current is expected to continue for at
least how long? - ANS-3 hours
The ampacity of the conductors from the generator terminals to the first distribution
device(s) containing overcurrent protection shall not be less than what percentage of
the nameplate current rating? - ANS-115%
ENT shall not be - ANS-threaded.
A panelboard for a mobile home shall be rated not less than which of the following? -
ANS-50 amperes
,Disregarding exceptions, liquidtight flexible metal conduit shall be supported and
secured at intervals not to exceed - ANS-4 1/2 feet.
What is the maximum weight of a luminaire that can be supported by the screw shell
of a lampholder? - ANS-6 pounds
Disregarding exceptions, what is the minimum size copper-clad aluminum
underground service conductor permitted? - ANS-6 AwG
The base of a 24-foot non-self-supporting ladder shall be placed approximately how
far from the vertical structure upon which is leaning? - ANS-6 feet
Alternating-current systems of less than 50 volts shall be grounded where supplied by
transformers, if the transformer supply system exceeds which of the following? - ANS-
150 volts to ground
What is the maximum distance that the emergency controls for an attended self-
service motor fuel dispensing facility shall be located from the dispensers? - ANS-100
feet
Where the negative polarity of a dc system does not serve as the connection point for
the grounded conductor, which color finish can be used to identify the negative
ungrounded conductor? - ANS-black
One horsepower is equal to how many watts? - ANS-746
The conductors, including splices and taps, shall not fill the wireway to more than
what percentage of its area? - ANS-75%
outlet for a 12 AWG conductor with a listed outlet branch-circuit type arc-fault circuit
interrupter installed at the first outlet What is the maximum permitted length of the
branch-circuit wiring from the branch-circuit overcurrent device to the first box? - ANS-
70 feet
, Which type of surge protection device is permanently connected and intended for
installation between the secondary of the service transformer and the line side of the
service disconnect overcurrent device? - ANS-Type 1
What is the power of a 4-ohm resistive load connected to a 120-volt power supply? -
ANS-120v/4ohm=3OA 30X120V= 3600w
Approximately how many kilowatts are used by a three -phase, 480- voit ac motor that
draws a current of 52 amperes and has a power factor rating of 88 % - ANS-480v x 52a
x 1.735= 43180W x .88= 38000w
What is the greatest root-mean-square (effective) difference of potential between any
two conductors of a circuit defined as? - ANS-voltage
A resistor has the following colored bands (in order): orange, red, brown, silver. What
is the resistor value? - ANS-320 Ohms (10% tolerance)
What is the formula for calculating power (watts)? - ANS-R x I 2
One horsepower is equal to how many watts? - ANS-746
A continuous load is a load where the maximum current is expected to continue for at
least how long? - ANS-3 hours
For other than a totally enclosed switchboard or switchgear, what is the minimum
amount of space that shall be provided between the top of the unshielded switchboard
or switchgear and any combustible ceiling? - ANS-36"
What is the required width of the working space in front of electrical equipment with a
22-inch width? - ANS-30 inches
What is the minimum fire rating for electrical vaults housing electrical equipment over
600 volts, nominal? - ANS-3 hours
