PSI Journeyman Online Practice Test Questions With Correct Answers

A fitting is a part of a wiring system that is intended primarily to perform which type of function? - Answer mechanical When the disconnecting means of a transformer is located remotely it must be? - Answer lockable If installed and routed on the outside of a raceway, the length of the equipment bonding jumper shall not exceed how many feet? - Answer 6 feet What is an askarel? - Answer a group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media In which locations are the installation of flexible metal conduit permitted? - Answer concealed locations Unlisted nonconductive outside plant optical fiber cables shall not be permitted to be installed in which type of raceways? - Answer flexible metal conduit. 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 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% Where an ac system is grounded at any point, the grounded conductors shall be routed with the ungrounded conductors to each service disconnecting means and shall be connected to each disconnecting means grounded conductors terminal or bus for an ac system operating at how many volts? - Answer 1,000 volts or less What is the maximum spacing for supports of 10 AWG copper conductors located in a vertical raceway? - Answer 100 feet What is the maximum overcurrent protection for a 10 AWG copper conductor? - Answer 30 amperes A circuit breaker does not have an interrupter rating shown on it. What is the interrupter rating of this circuit breaker? - Answer 5,000 amperes Dry-type transformers rated over which voltage shall be installed in a vault? - Answer 35,000 volts A panelboard for a mobile home shall be rated not less than which of the following? - Answer 50 amperes An electrical appliance is rated at 1,500 watts, and is connected to 120 volts. What is the resistance associated with this appliance? - Answer 9.6 ohms High-impedance grounded neutral systems in which a grounding impedance limits the ground fault current to a low value shall be permitted for which type of system? - Answer 3-phase ac systems of 480 volts to 1,000 volts Where the positive polarity of a dc system does not serve as the connection for the grounded conductor, which color finish can be used to identify the positive ungrounded conductor? - Answer red Information technology equipment shall be permitted to be connected to a branch circuit by a power-supply cord with a maximum length of how many feet? - Answer 15 feet 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 What is the greatest root-mean-square (effective) difference of potential between any two conductors of a circuit defined as? - Answer voltage A motor controller disconnecting means shall be permitted to be out of sight of the controller for motor circuits over how many volts? - Answer 1,000 volts, nominal The following measurements are taken on a 3-phase load: power used is 11,250 watts, 208 volts applied, and current is 35 amperes per phase leg. What is the power factor of the load? - Answer 89% 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 In a fire alarm system, single conductors shall not be smaller than? - Answer 18 AWG 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% In which application is the installation of UF cable permitted? - Answer in photovoltaic systems Equipment grounding conductors of bare or insulated aluminum or copper-clad aluminum shall not be terminated within how many inches of the earth? - Answer 18 inches Where practicable, what is the minimum amount of separation that shall be maintained between communications wires and cables on buildings and lightning conductors? - Answer 6 feet The combined cross-sectional area of all conductors or cables shall not exceed what percentage of the interior cross sectional area of the underfloor raceway? - Answer 40% What is the minimum rating for a standard lampholder that shall be used for circuits and equipment operating at less than 50 volts? - Answer 660 watts Lamp tie wires, mounting screws, clips, and decorative bands on glass shall not be required to be grounded if spaced at least how far from the lamp terminals? - Answer 1 1/2 inches Disregarding exceptions, what is the minimum size copper-clad aluminum underground service conductor permitted? - Answer 6 AWG Where is AC cable NOT permitted to be used? - Answer in damp locations How far shall the work space extend from the grade, floor, or platform for equipment that is 60 inches in height? - Answer 78 inches Overcurrent protection for feeders and 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% What is the maximum weight of a luminaire that can be supported by the screw shell of a lampholder? - Answer 6 pounds