PSI Test Practice Questions and Answers 2022
The service disconnecting means may be installed in all of the following EXCEPT -Answer- the bathroom.
What is the minimum size EMT conduit required for three 14 AWG, si
...
PSI Test Practice Questions and Answers 2022
The service disconnecting means may be installed in all of the following EXCEPT -Answer- 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. -Answer- 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? -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%
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
Disregarding exceptions, liquidtight 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 lampholder? -Answer- 6 pounds
Disregarding exceptions, what is the minimum size copper-clad aluminum underground service conductor permitted? -Answer- 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? -Answer- 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? -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
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
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? -Answer- 36"
What is the required width of the working space in front of electrical equipment with a 22-inch width? -Answer- 30 inches
What is the minimum fire rating for electrical vaults housing electrical equipment over 600 volts, nominal? -Answer- 3 hours
What is the maximum voltage drop for any branch circuit, separately derived system, operating at 120 volts line-to-line and 60 volts to ground, serving sensitive electronic equipment? -Answer- 1.5 %
Service conductors installed as open conductors or multiconductor cable without an overall outer jacket shall have a minimum clearance of how many feet from porches and balconies? -Answer- 3 feet
Where a feeder supplies continuous loads or any combination of continuous and noncontinuous loads, the minimum feeder conductor size shall have an allowable ampacity not less than the noncontinuous load plus what percentage of the continuous load? -Answer- 125%
What is the recommended maximum total voltage drop on both feeders and branch circuits to the farthest outlet? -Answer- 5
[Show More]
