CM 411 Actual Exam Questions With 100% Complete Solutions Latest Update
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Course
CM 411
Institution
CM 411
Assume that you have a series of circuit with forty-eight, 10 ohm lights connected to a 120 volt source. The voltage (in volts) across each light is: - ANS-2.5
Assume that you have a series of circuit with forty-eight, 10 ohm lights connected to a 120 volt source. The total current flow (in amps...
CM 411 Actual Exam Questions With
100% Complete Solutions Latest Update
Assume that you have a series of circuit with forty-eight, 10 ohm lights connected to a
120 volt source. The voltage (in volts) across each light is: - ANS-2.5
Assume that you have a series of circuit with forty-eight, 10 ohm lights connected to a
120 volt source. The total current flow (in amps) through the circuit is: - ANS-0.25
Which of the following electrical circuit arrangements is most common in buildings: -
ANS-parallel circuit
Assume that each of the two units at Diablo Canyon Power Plant is capable of
producing 1,200 MW. Also assume that a home uses only 10 amps of current at 120
volts on average due to load diversity. The number of homes that each unit at Diablo
Canyon can power is: - ANS-1,000,000
Disadvantages of a low power factor include: - ANS-Additional generation is required
and the utility company could impose a penalty
The name of the type of diagram that shows he main distribution of power is: - ANS-
single line diagram
Assume you have a parallel circuit with a 240 watt light fixture, a 600 watt exhaust fan,
and a 360 watt television all connected to a 120 volt source. The current (in amps)
through the exhaust fan is: - ANS-5
Assume you have a parallel circuit with a 240 watt light fixture, a 600 watt exhaust fan,
and a 360 watt television all connected to a 120 volt source. The total current (in amps)
flowing through the circuit is: - ANS-10
One reason why power is transmitted at higher voltages is: - ANS-smaller diameter wire
may be used
, For smaller sized wire, as the physical size increases the AWG number: - ANS-gets
smaller
For larger sized wire, as the physical size increases the kcmil number: - ANS-gets
bigger
What is the correct order of the following equipment as shown on a single line diagram?
1). 120/208 V panel board, 2). utility service entrance cable, 3). 225A breaker for panel,
5). 480 V main switchboard, 6). 400A main switchboard breaker, 7). panelboard feeder -
ANS-2-5-6-4-7-1-3
From your site plan reading exercise, where is the building transformer located? - ANS-
Inside the building, in a separate enclosure from the main distribution equipment
From your site plan reading assignment, what was the minimum burial depth indicated
on the drawings for the power conduits? - ANS-None of these are correct
_____ is the joining of two or more electrical conductors by using a special compression
device. - ANS-splicing
Assume that you come in contact with a 120 V electrical circuit. The minimum contact
resistance (in ohms) to prevent a fatal (six milliamperes,or 0.006 amps) shock is: - ANS-
20,000
Assume that you come in contact with a 120 V electrical circuit. The current (in
milliamps) with the above voltage through wet (contact resistance of 1,000 ohms) hands
is: - ANS-120
A _______ is a round indentation punched into the metal of a box and held in place by
unpunched narrow strips of metal. - ANS-knockout
What type of lighting fixture would you specify if you wanted the lowest installed cost? -
ANS-incandescent
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