| 1. |
A motor controller that is subject to periodic submersing in liquid sewage probably requires a NEMA Type _______ enclosure.
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Web Reference
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a)
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NEMA 4
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b)
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NEMA 6
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c)
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NEMA 12
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d)
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NEMA 7
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e)
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Both b and d
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| 2. |
A ground ring grounding electrode shall encircle the building and consist of at least 20 feet of bare copper conductor not smaller than No. ____ and shall be buried to a depth of no less than ____.
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a)
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4, 3 feet
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b)
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2, 2 feet
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c)
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2, 2 1/2 feet
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d)
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2, 18 inches
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| 3. |
In general, Type UF feeder and branch circuit cable shall be buried to a minimum depth of ________ outside of buildings .
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a)
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24 inches
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b)
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18 inches
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c)
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12 inches
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d)
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6 inches
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| 4. |
If direct buried cables are installed under buildings they shall be installed in which manner.
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a)
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shall be installed in a raceway
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b)
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shall be in a trench with 2 inches of concrete over the trench.
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c)
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direct buried just like they are outside the building.
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d)
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a and b
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e)
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a and c
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| 5. |
A conduit nipple shall be permitted to be filled to 60 percent of its cross sectional area if its length is less than or equal to _______ inches.
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a)
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18
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b)
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24
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c)
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30
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d)
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36
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| 6. |
Underwater lighting fixtures in swimming pools shall be protected with ground fault circuit interrupters if the fixtures operate at more than ________ volts.
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a)
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30
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b)
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48
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c)
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15
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d)
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120
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| 7. |
Disregarding any exceptions, lighting fixtures and lighting outlets installed over an outdoor spa without ground fault protection shall be located not less than _____ above the maximum water level. Lighting fixtures installed over an indoor spa, where GFCI is installed, require a clearance of not less than _____ above the maximum water level.
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a)
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10 feet and 5 feet
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b)
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12 ft ,and 7 ft. 6 inches
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c)
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12 feet and 12 feet
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| 8. |
Conductors that are directly buried in earth shall be _______.
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a)
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identified for such use
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b)
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labeled for such use
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c)
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listed for such use
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d)
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installed in raceway.
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| 9. |
Aluminum cable trays shall not be used as an equipment grounding conductor for circuits with a ground fault protection above _______ amperes.
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a)
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2,000
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b)
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600
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c)
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400
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d)
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100
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| 10. |
The ampacity of No. 2 Type "W" 90 degree C. rated flexible cord in a 30 degree C. ambient when there are 3 current carrying conductors in the cable is _____ amperes.
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a)
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152
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b)
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125
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c)
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100
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d)
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90
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| 11. |
Power sources other than transformers used to protect Class 1 Power Limited Circuits shall be protected by overcurrent devices rated at not more than ______ percent of the rated current of the source (volt-amperes divided by voltage rating)
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a)
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100
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b)
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125
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c)
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167
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d)
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200
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| 12. |
A disconnect is required to be installed within _____ of the inside walls of a hot tub.
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a)
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5 feet
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b)
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15 feet
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c)
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25 feet
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| 13. |
A 120/240 volt service cable passing over an out door hot tub shall have a vertical clearance of at least _______ feet above the water level.
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a)
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12
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b)
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15
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c)
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22
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d)
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18
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| 14. |
Non dual rated Type USE conductors cannot be installed inside a building and shall be protected where they emerges from under ground by ______.
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a)
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a raceway that extends up to 8 feet above ground
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b)
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other effective means
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c)
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a coating of fire retardant material
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| 15. |
Four current carrying XHHW insulated 500 kcmil aluminum conductors are installed in a raceway that is in a WET location. The ampacity rating of each conductor is ______ amperes.
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a)
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310
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b)
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280
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c)
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248
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d)
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200
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| 16. |
Given: One 25-hp, 460-V, 3-phase, squirrel-cage motor, nameplate full-load current 32 A, Design B, Service Factor 1.15
The branch circuit conductors shall have an ampacity rating of _____ amperes and the maximum time delay fuse size that can be used to protect this circuit is ____amperes.
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a)
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42.5 and 70
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b)
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40 and 110
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c)
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42.5 and 60
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| 17. |
A point located 30 inches above grade and 23 feet from the edge of an indoor remote gasoline pump is classified as __________.
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a)
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Class 2 , Division 2
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b)
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Unclassified
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c)
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Class 1, Division 1
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d)
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Class 1, Division 2
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| 18. |
Power supply cords attached to the side of recreational vehicles no more than 3 feet above the ground shall be a minimum of _____.
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a)
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28 feet
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b)
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23 feet
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c)
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15 feet
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| 19. |
General-use switch having an ampere rating not less than twice the full-load current rating of the motor shall be permitted to serve as a disconnecting means for a stationary motor rated at ________ horsepower and 300 volts or less.
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a)
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2
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b)
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1/3
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c)
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1/8
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| 20. |
The rating of the receptacle and attachment plug cap used as a mobile home supply shall not be less than _______
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a)
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50 amperes
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b)
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10,000 volt-amperes
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c)
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100 amperes
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d)
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6 amperes
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