JOURNEYSMAN EXAM GENERAL KNOWLEDGE

JOURNEYSMAN EXAM GENERAL KNOWLEDGE 1. Definition of a continuous load: - Answer: A load where the maximum current is expected to continue for at least 3 hours. 2. Current drawn by a 3-hp, 240-volt, 3-phase motor (90% efficiency, 95% power factor): - Answer: 6.3 amperes. 3. Kilowatts used by a three-phase, 480-volt AC motor drawing 52 amperes with an 88% power factor: - Answer: Approximately 38 kW. 4. Resistor value for colored bands: orange, red, brown, silver: - Answer: 320 Ohms (10% tolerance). 5. Resistance associated with a 1,500-watt appliance connected to 120 volts: - Answer: 9.6 Ohms. 6. Horsepower to watts conversion: - Answer: One horsepower is equal to 746 watts. 7. Type of surge protection device for installation between service transformer and service disconnect: - Answer: Type 1. 8. Definition of askarel: - Answer: A group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media. 9. Workspace requirement for equipment that is 60 inches in height: - Answer: The workspace shall extend 78 inches from the grade, floor, or platform. 10. Recess distance for metallic plugs or plates in nonmetallic enclosures: - Answer: 1/4 inch. 11. Minimum space required above unshielded switchboard or switchgear to any combustible ceiling: - Answer: 36 inches. 12. Recommended maximum total voltage drop on feeders and branch circuits: - Answer: 5%. 13. Identification color for the negative ungrounded conductor in a DC system: - Answer: Black. 14. Type of conduit not permitted for underground service conductors: - Answer: FMC (Flexible Metal Conduit). 15. Maximum duration for temporary electric power and lighting installations for holiday decorative lighting: - Answer: 90 days. 16. Maximum voltage drop for branch circuits serving sensitive electronic equipment operating at 120 volts line-to-line: - Answer: 1.5%. 17. Identification color for the positive ungrounded conductor in a DC system: - Answer: Red. 18. Feeder conductor size requirement when supplying continuous and noncontinuous loads: - Answer: Minimum ampacity shall be not less than the noncontinuous load plus 125% of the continuous load. 19. Clearance for overhead spans of conductors over residential property (not over 1,000 volts): - Answer: 12 feet. 20. Type of service-entrance conductors allowed in a cable tray: - Answer: MI cable (Mineral Insulated cable). 21. Requirement for receptacle installation in residential units: - Answer: No point measured horizontally along the floor line of any wall space is more than 6 feet from a receptacle outlet. What must circuit breakers used as switches in high-intensity discharge lighting circuits be marked as? ️HID What is the maximum permitted length of the branch-circuit wiring from the branch-circuit overcurrent device to the first outlet for a 12 AWG conductor with a listed outlet branch-circuit type arc-fault circuit interrupter installed at the first outlet box? ️70 feet The service disconnecting means may be installed in all of the following EXCEPT ️the bathroom Plug fuses shall be permitted to be used in circuits supplied by a system having a grounded neutral point where the line-to-neutral voltage does NOT exceed which of the following? ️150 volts A motor controller disconnecting means shall be permitted to be out of sight of the controller for motor circuits over how many volts? ️1,000 volts, nominal What is the maximum overcurrent protection for a 10 AWG copper conductor? ️30 amperes For permanently connected appliances, the branch-circuit overcurrent device shall be permitted to serve as the disconnecting means for appliances rated at not over ️300 volt-amperes or 1/8 hp When the disconnecting means of a transformer is located remotely it must be ️lockable Which is best defined as an unintentional, electrically conductive connection between an ungrounded conductor of an electrical circuit and the normally non-current carrying conductors, metallic enclosures, metallic raceways, metallic equipment, or earth? ️ground fault Resistance-type heating elements in electric space-heating equipment shall be protected at not more than how many amperes? ️60 amperes Individually covered or insulated equipment grounding conductors shall have a continuous outer finish that is either green or green with one or more ️yellow stripes If installed and routed on the outside of a raceway, the length of the equipment bonding jumper shall not exceed how many feet? ️6 feet What is the minimum size copper-clad aluminum equipment grounding conductor for a feeder with a 100-ampere overcurrent protection device? ️6 AWG High-impedance grounded neutral systems in which a grounding impedance limits the ground fault current to a low value shall be