| 1. |
What is the duty cycle for a spot welder supplied by a 60-Hz system (216,000 cycles per hour) making three hundred 15-cycle welds per hour?
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a)
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1percent
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b)
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2.1 percent
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c)
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3.2 percent
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| 2. |
In general, where installed in raceways conductors larger than No. _____shall be stranded.
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a)
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8
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b)
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10
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c)
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6
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d)
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4
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| 3. |
With a feeder load of 14 kW on a household electric range, the maximum unbalanced load shall be considered to carry a load of : (chose the closest answer)
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a)
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41 amperes
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b)
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26 amperes
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c)
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33 amperes
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| 4. |
Where THHN conductors are added to an existing raceway that contains older 60 degree C insulated conductors, the ampacity of the THHN conductors cannot exceed _______.
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a)
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The ampacities in the 60 degree column
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b)
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The ampacities in the 75 degree column
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c)
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The ampacities in the 90 degree column
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d)
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The ampacities in the 90 degree column with 60 percent derating.
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| 5. |
The ampacity of a 75 degree C. rated conductor in an ambient of 75 degrees C. is ____.
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a)
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0 amperes
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b)
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90 percent of its normal ampacity
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c)
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60 percent of its 75 degree ampacity
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| 6. |
Wiring to receptacles under raised floors in computer rooms shall be ______.
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a)
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Type MI cable, Type MC cable, or Type AC cable
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b)
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In rigid metal conduit, rigid nonmetallic conduit, intermediate metal conduit, electrical metallic tubing, metal wireway, surface metal raceway with metal cover, flexible metal conduit, liquidtight flexible metal or nonmetallic conduit
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c)
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Nonmetallic Shielded Cable (NMB)
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d)
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All of the above
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e)
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A or B of the above
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| 7. |
Intrinsically safe circuits can be identified using ______.
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a)
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blue color
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b)
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red color
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c)
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orange color
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d)
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any color
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| 8. |
Nonincenditive circuits shall be permitted to be used in ______areas.
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a)
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Class I, Division 2
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b)
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Class I, Division 1
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c)
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Class III
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d)
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All of the above
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e)
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Only a and c.
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| 9. |
What is the maximum distance allowed for spacing supports for No. 10 copper conductors which are vertically installed in raceways.
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a)
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25 feet
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b)
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50 feet
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c)
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100 feet
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d)
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150 feet
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| 10. |
Flat conductor cable installations:
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a)
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Are suitable for school installations
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b)
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Must be installed under carpet squares
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c)
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Can only be installed on concrete floors
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d)
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Are limited to voltages not exceeding 150 volts.
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| 11. |
A restaurant may be wired using nonmetallic sheathed cable when:
(1) The building is NOT required to be fire rated construction.
(2) The building does not exceed 3 floors and the restaurant occupancy load is less than 100 persons.
(Select the best answer.)
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a)
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1 only
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b)
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2 only
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c)
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Both 1 and 2
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d)
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Neither 1 or 2
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| 12. |
Mineral insulated cable is approved for almost all locations and conditions but one of the below. Which is it?`
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a)
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Where embedded in concrete
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b)
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Exposed to gasoline
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c)
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where exposed to destructive corrosive conditions
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| 13. |
Type AC cable shall be constructed to include:
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a)
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At least 3 conductors
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b)
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An insulated equipment grounding conductor
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c)
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An internal bonding strip of copper or aluminum in intimate contact with the armor for its entire length.
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| 14. |
The pull box below is used for conductors larger than No. 6. What are the required minimum dimensions for X and Y?
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a)
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X = 24 inches, Y = 16 inches
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b)
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X = 20 inches, Y = 24 inches
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c)
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X = 24 inches, Y = 24 inches
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d)
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X = 30 inches, Y = 30 inches
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| 15. |
How many 1/2 inch diameter control cables can be installed in a 18 inch ladder type cable tray with 6 inch high sides?
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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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150
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d)
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275
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| 16. |
If a service consists of 4 each 500 kcmil copper conductors per phase in a gutter and is 3 -phase 4 wire 480/277 volts what size copper bonding jumper is required on the supply side of the service disconnecting means?
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a)
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3/0
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b)
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250 kcmil
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c)
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300 kcmil
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d)
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350 kcmil
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| 17. |
Disregarding exceptions the minimum cover requirement for a direct burial cable with a circuit voltage of 7200 volts to ground is _______.
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a)
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30 inches
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b)
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36 inches
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c)
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42 inches
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d)
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48 inches
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| 18. |
When is ground fault protection required on a service?
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a)
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277/480 volts solidly grounded Wye rated at 1000 amperes or more
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b)
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120/208 volts Wye rated 1200 amperes or more
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c)
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120/240 volts rated 1000 amperes or more
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d)
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All of the above
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| 19. |
How many three way and four way switches are required to operate a light from eight (8) locations?
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a)
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6 each 3 way, and 2 each 4 way
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b)
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2 each 3 way and 6 each 4 way
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c)
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3 each 3 way and 3 each 4 way
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d)
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None of the above - it cannot be done.
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| 20. |
When does the Code allow welding of Conduit or couplings?
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a)
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Where raceway risers or cable is not installed within the (lighting) pole, a threaded fitting or nipple shall be brazed or welded to the pole opposite the handhole for the supply connection.
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b)
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The Code does not allow welding of conduit.
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c)
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Conduit couplings can always be welded
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d)
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Conduit can be welded when the AHJ allows it.
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e)
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a and d
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