Practice test PSI/ 210+ Qs with Certified Ans/
2024-2025.
Disregarding exceptions, liquid tight flexible metal conduit shall be supported and
secured at intervals not to exceed - Answer: 4 1/2 feet.
What is the maximum weight of a luminaire that can be supported by the screw
shell of a lamp holder? - Answer: 6 pounds
Disregarding exceptions, what is the minimum size copper-clad aluminum
underground service conductor permitted? - Answer: 6 AwG
Page 1 of 31
,The base of a 24-foot non-self-supporting ladder shall be placed approximately
how far from the vertical structure upon which is leaning? - Answer: 6 feet
The service disconnecting means may be installed in all of the following EXCEPT -
Answer: the bathroom.
ENT shall not be - Answer: threaded.
A panelboard for a mobile home shall be rated not less than which of the
following? - Answer: 50 amperes
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. - Answer: 1 inch
Overcurrent protection for feeder’s 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? - Answer: 125%
A continuous load is a load where the maximum current is expected to continue
for at least how long? - Answer: 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? - Answer: 115%
Page 2 of 31
,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? - Answer: 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? -
Answer: 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? - Answer: black
One horsepower is equal to how many watts? - Answer: 746
The conductors, including splices and taps, shall not fill the wireway to more than
what percentage of its area? - Answer: 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? - Answer: 70 feet
Page 3 of 31
, 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? - Answer: Type 1
What is the power of a 4-ohm resistive load connected to a 120-volt power
supply? - Answer: 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 % -
Answer: 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? - Answer: voltage
A resistor has the following colored bands (in order): orange, red, brown, silver.
What is the resistor value? - Answer: 320 Ohms (10% tolerance)
What is the formula for calculating power (watts)? - Answer: R x I 2
One horsepower is equal to how many watts? - Answer: 746
A continuous load is a load where the maximum current is expected to continue
for at least how long? - Answer: 3 hours
Page 4 of 31
2024-2025.
Disregarding exceptions, liquid tight flexible metal conduit shall be supported and
secured at intervals not to exceed - Answer: 4 1/2 feet.
What is the maximum weight of a luminaire that can be supported by the screw
shell of a lamp holder? - Answer: 6 pounds
Disregarding exceptions, what is the minimum size copper-clad aluminum
underground service conductor permitted? - Answer: 6 AwG
Page 1 of 31
,The base of a 24-foot non-self-supporting ladder shall be placed approximately
how far from the vertical structure upon which is leaning? - Answer: 6 feet
The service disconnecting means may be installed in all of the following EXCEPT -
Answer: the bathroom.
ENT shall not be - Answer: threaded.
A panelboard for a mobile home shall be rated not less than which of the
following? - Answer: 50 amperes
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. - Answer: 1 inch
Overcurrent protection for feeder’s 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? - Answer: 125%
A continuous load is a load where the maximum current is expected to continue
for at least how long? - Answer: 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? - Answer: 115%
Page 2 of 31
,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? - Answer: 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? -
Answer: 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? - Answer: black
One horsepower is equal to how many watts? - Answer: 746
The conductors, including splices and taps, shall not fill the wireway to more than
what percentage of its area? - Answer: 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? - Answer: 70 feet
Page 3 of 31
, 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? - Answer: Type 1
What is the power of a 4-ohm resistive load connected to a 120-volt power
supply? - Answer: 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 % -
Answer: 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? - Answer: voltage
A resistor has the following colored bands (in order): orange, red, brown, silver.
What is the resistor value? - Answer: 320 Ohms (10% tolerance)
What is the formula for calculating power (watts)? - Answer: R x I 2
One horsepower is equal to how many watts? - Answer: 746
A continuous load is a load where the maximum current is expected to continue
for at least how long? - Answer: 3 hours
Page 4 of 31
