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1. Voltage is _____ to the number of turns. - Correct Answer: proportional
2. Internal Resistance - Correct Answer: Resistance going through a battery
or generator (DC)
3. Voltage drop should not exceed what percentage from service to branch
circuit? - Correct Answer: 5%
4. Bus bars are rated at _____ per square inch - Correct Answer: 1000 A
5. Square Mils - Correct Answer: Square mils = width x thickness
Square mils = CMA x .78
6. CMA of 10AWG - Correct Answer: 10,383
7. Resistance value chart - Correct Answer: K = 10.4 (Cu) or 17 (Al) .......>
20 degrees celcius
, = 12.9 (Cu) or (21) ...........> 75 degrees celcius
8. 1 mill - Correct Answer: 1/1000 inch
9. Diameter of a strand - Correct Answer: 94 mills
10.Inductance in series/parallel - Correct Answer: Series= additive
Parallel= inversely additive
11.The maximum percentage of conduit fill on rewiring installations is -
Correct Answer: 40%
12.If installed in dry locations, wireways may be used, for circuits of not more
than - Correct Answer: 600V
13.Of the following, the fitting that is used to permit the opening of a conduit
at a point between boxes without sawing or breaking the conduit run is
the... - Correct Answer: conduit union
14.Except where busways are entering or leaving service or distribution
equipment, the bottom of the busway enclosure for all horizontal busway
runs should be kept at a minimum height above the floor.... - Correct
Answer: 6 feet
, 15.A compensator is a device used with induction motors to - Correct
Answer: decrease the line voltage starting
16.The relative polarity of the windings of a transformer may be determined by
- Correct Answer: Phasing out
17.A 2HP 3-Phase 220 volt squirrel cage motor would usually be started by
means of - Correct Answer: an across the line starter
18.All continuous duty motor shall be provided with overload protection is
sized greater than - Correct Answer: 1 HP
19.The type of starting and speed control equipment that would be used for a
50 HP wound induction motor is - Correct Answer: with resistors
connected in rotor circuit
20.The minimum number of overload devices required for a 3 phase AC motor
connected to a 120/208V system - Correct Answer: 3 (same number of
phases)
21.In order to reverse a 3-phase squirrel cage induction motor, you would... -
Correct Answer: reverse any two line leads
22.Feeder tap rule - Correct Answer: 25' long = 1/3 of the ampacity rating
of fuse
15' long = 1/10 of the ampacity rating of fuse