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What is the minimum number of
receptacle outlets required in the following diagram. |
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Web Reference
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a) |
5 |
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b) |
6 |
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c) |
7 |
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d) |
8 |
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| 2
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What does the following drawing
represent? |
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a) |
Current transformer |
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b) |
Auto transformer |
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c) |
Single-Phase transformer |
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d) |
Three phase transformer |
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| 3
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A 50 volt generator which is driven
by a single motor is protected by the overcurrent device protecting the motor
only when the generator is delivering no more than what percent of its full-load
rated current? |
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a) |
100 percent |
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b) |
125 percent |
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c) |
150 percent |
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d) |
80 percent |
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| 4
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The overcurrent protection for
conductors shall not exceed how many amperes when the control circuit conductor
for the motor is No. 12 AWG copper and do not extend beyond the motor control
enclosure? |
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a) |
100 amperes |
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b) |
120 amperes |
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c) |
60 amperes |
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d) |
20 amperes |
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| 5
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Generally, what is the minimum
number of overload units in a three phase motor? |
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a) |
One |
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b) |
Two |
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c) |
Three |
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d) |
None |
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| 6
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If the overcurrent protection
rating is not marked and the appliance is rated 13.3 amperes or less the
branch-circuit rating of a non-motor operated appliance shall have a minimum
rating of what? |
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a) |
150 percent of the full load rating of the appliance |
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b) |
100 percent of the full load rating of the appliance |
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c) |
20 amperes |
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d) |
30 amperes |
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| 7
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A cutout box installed in a wet
location shall be what? |
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a) |
Rain tight |
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b) |
Weatherproof |
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c) |
Waterproof |
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d) |
Rainproof |
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| 8
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A junction box used in a system
rated 1,000 volts shall have a marking on it of what? |
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a) |
DANGER |
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b) |
HIGH VOLTAGE |
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c) |
KEEP OUT |
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d) |
DANGER - HIGH VOLTAGE - KEEP OUT |
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| 9
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A nonmetallic wireway and metal
wire way cannot be filled to more than 20 percent of their cross sectional
area. What is the maximum number of current carrying conductors allowed
in a metal wire way when no derating is required? |
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a) |
80 |
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b) |
50 |
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c) |
30 |
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d) |
20 |
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| 10
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Metal surface raceways having
splices and taps shall be permitted as long as the splices and taps, and
conductors do not fill the raceway more than how much of the area of the
raceway at that point? |
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a) |
40 percent |
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b) |
75 percent |
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c) |
50 percent |
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d) |
60 percent |
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| 11
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Panelboards having an approved
system of organic coatings and are installed out-of-doors shall be marked
in which manner? |
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a) |
Weatherproof |
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b) |
Rain tight |
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c) |
Water tight |
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d) |
Outdoor usage |
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| 12
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An effective ground-fault current
path requires which of the following? |
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a) |
A solid metallic object |
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b) |
The ability to conduct fault-current |
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c) |
An energized source |
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d) |
Sufficient low impedance to limit the voltage to ground
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| 13
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Equipment installed and likely
to become energized shall be grounded for which of the following distances?
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a) |
8 feet horizontal or 5 feet vertical of grounded metal objects ,
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b) |
5 fee vertical or 5 feet horizontal of grounded metal objects
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c) |
8 feet vertical or 5 feet horizontal of grounded metal objects
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d) |
8 feet vertical or 8 feet horizontal of grounded metal objects
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| 14
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Circuit breakers which are used
to switch 120 volt fluorescent lights on an off shall be marked with what
listing? |
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a) |
U.L. approved |
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b) |
5,000 RMS |
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c) |
SWD or HID |
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d) |
10,000 RMS |
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| 15
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According to the NEC, service-entrance
conductors for an over 600-volt service are protected by a circuit breaker
against short-circuits if it has how many times the ampacity of the conductor
for its trip setting? (Short circuit protection)
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a) |
3 times |
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b) |
5 times |
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c) |
6 times |
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d) |
8 times |
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| 16
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What is the smallest size of service-entrance
copper conductors permitted when installed in a non-metallic raceway when
supplying three single branch circuit loads in a commercial building.?
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a) |
No. 10 |
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b) |
No. 8 |
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c) |
No. 6 |
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d) |
No. 4 |
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| 17
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When shall the ground-fault protection
system be tested? |
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a) |
When it is installed |
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b) |
When it is manufactured |
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c) |
When it is inspected |
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d) |
When it is energized for the first time |
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| 18
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What is the maximum time of delay
permitted for a feeder disconnect rated 1000 amperes or more on a solidly
grounded wye electrical system of more than 150 volts to ground, but not exceeding
600 volts phase-to-phase, that is NOT (1) a continuous industrial process
where a orderly shutdown will introduce additional or increased hazards,
and (2) is also not for a fire pump, and (3) does not have a ground fault
protected service ? |
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a) |
1/2 second |
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b) |
1second |
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c) |
3 seconds |
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d) |
100 milliseconds |
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| 19
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What is the minimum size rating
of a 240/120 volt single phase service entrance conductors supplying a single
family dwelling having 1200 square feet of living space and a net computed
load of 4800 KA? |
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a) |
100 amperes |
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b) |
200 amperes |
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c) |
60 amperes |
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d) |
30 amperes |
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| 20
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Given a single family residence
with a general lighting load of 22,500 watts. What is the demand lighting
load for the residence? |
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a) |
22,500 |
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b) |
19,500 |
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c) |
6,825 |
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d) |
9,825 |
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