Electrical Equipment
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| 1. Premises wiring primarily includes exterior wiring and does NOT include interior wiring. True/False | False, Article 100 definitions
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| 2. When a bank of storage batteries is installed in a separate, well ventilated room with an unlocked door, the separate room make the bank of batteries inaccessible True/False | False, def 100
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| 3. The most common nominal battery voltage for a lead-acid battery is __ volts per cell | 2
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| 4. Capacitors shall be enclosed in vaults or outdoor fenced enclosures in compliance with the applicable provisions of art 110 when they contain more than __- gallons of flammable liquid | 3 gallons
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| 5. Under normal operating conditions, in order to prevent destruction of the cell due to ignition of gases within a battery cell, each vented cell shall be equipped with a ___ | flame arrester
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| 6. A thermal barrier shall be installed between resistors and combustible material when the distance is less than __ | 12 inches
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| 7. Article 450 covers the installation of all tansformers True/False | False; 450.1 exceptions
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| 8. Less flammable liquid insulated transformers are permitted to be installed indoors in a Type I or II building if which of the following conditions are met: | all of above
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| 9. Dry-type transformers installed outdoors shall have a __ enclosure | weather proof
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| 10. In general, dry-type transformers rated over 112 1/2 kVA installed outdoors shall NOT be located within ___ of combustible materials of buildings | 12 in
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| 11.In general, the ampacity of the conductors from the generator terminals to the first overcurrent device shall NOT be less than ___ of the nameplate current rating of the generator | 115%
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| 12. A sealed battery or battery cell must be equipped with ___ or be designed to prevent__ | pressure release vent, scatter of cell parts
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| 13. A 75-kVA dry-type, single-phase, 277 volt primary 120-volt secondary, completely enclosed transformer is installed indoors within six inches of combustible materials. In compliance? True/False | True 12 inches
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| 14. A door knob operated by turning and pushing to open the door is NOT permitted on the personnel exit door of a transformer vault doorway. True /False | True
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| 15. The ampacity of the capacitor circuit for a capacitor bank shall NOT be less than __ of the rated current of the capacitor | 135%
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| 16. Where accessible to unqualified persons, generators shall he no live parts exposed to accidental contact when the generator operates at more than ___ volts to ground | 50
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| 17. Voltage transformers installed indoors or enclosed shall be protected with ___ | primary fuses
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| 18.In general, where the word transformer is used in Art 450, which of the following installations is it intended to cover | I,II, and III
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| 19. After a capacitor is disconnected from the source of supply, the residual voltage of the capacitor shall be reduced to __ volts, nominal, or less within one minute for capacitors rated 600 volts, nominal, or less | 50
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| 20. A ___ battery is defined as a battery comprised of one or more rechargeable cells of the lead-acid, nickel-cadmium, or other rechargeable eletro-chemical types | stored
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| 21. For other than motor starting service, insulated conductors installed between a resistive element and a controller shall have an insulation with an operating temperature of NOT less than ___ where installed in accordance with art 470 | 90 degree C
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| 22. The door sill or curb around a liquid-cooled transformer installed to protect a transformer vault doorway shall NOT be less than a height sufficient to confine the oil from the largest transformer in the vault, but in no case be less than __ high | 4 in
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| 23. The rating of disconnecting means for a bank of capacitors shall NOT be less than ___ of the rated current of the capacitor bank | 135%
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| 24. Generators shall be so located that the replacement of brushes can be readily accomplished. True/False | True
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| 25. All transformers and transformer vaults are required to be readily accessible to qualified personnel for inspection or maintenance. True/False | False
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| 26.Battery locations ___ (shall/shall not) conform to the working space requirements of 110.26 | shall
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| 27. The walls and roofs of transformer vaults shall be constructed of materials which have adequate structural strength for the conditions with a minimum fire resistance of __ hours | ?
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| 28. Article __ covers the general requirements for equipment operating at more than 600 volts nominal | 490
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| 29. What does Part IV of Article 490 address | mobile and portable equipment
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| 30. How is high voltage defined for the purposes of Art 490 | more than 600 volts
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Created by:
JoshHampton