CM 411 Exam 1 Flashcards Questions With 100% Accurate Solutions
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Course
CM 411
Institution
CM 411
Assume that you have a 120 volt circuit with 2 lights (of equal resistance) connected in a series. What is the voltage across each light? - CORRECT ANSWER-60
Assume that you have a 120 volt circuit with 2 lights (of equal resistance) connected in parallel. What is the voltage across each light? ...
CM 411 Exam 1 Flashcards Questions
With 100% Accurate Solutions
Assume that you have a 120 volt circuit with 2 lights (of equal resistance) connected in
a series. What is the voltage across each light? - CORRECT ANSWER-60
Assume that you have a 120 volt circuit with 2 lights (of equal resistance) connected in
parallel. What is the voltage across each light? - CORRECT ANSWER-120
An Ohm is an electrical unit that measures - CORRECT ANSWER-resistance
Watts are an electrical unit that measures - CORRECT ANSWER-power
The power formula is useful when determining expected ________ values because
most electrical equipment lists a voltage and power rating - CORRECT ANSWER-
current
Power and energy differ as follows: - CORRECT ANSWER-power is instantaneous,
while energy is time dependent
The difference between a cable and a wire is: - CORRECT ANSWER-a cable is an
assembly of wires
Assuming the same type of insulation, which wire has a larger diameter? - CORRECT
ANSWER-500 kcmil
Assuming the same type of insulation, which wire can carry more current? - CORRECT
ANSWER-500 kcmil
The "14" in a cable marked "14/2" indicates: - CORRECT ANSWER-the size of the wire
, Electrical device boxes can be ______ shaped - CORRECT ANSWER-square,
octagonal, or rectangular
Once installed, receptacle boxes in walls can be completely permanently covered for
appearance - CORRECT ANSWER-False
The size of an outlet box is based upon the location of the outlet box - CORRECT
ANSWER-False
______ is the joining of two or more electrical conductors by mechanically twisting the
conductors together or by using a special splicing device - CORRECT ANSWER-
Splicing
Panelboard circuit breakers can provide good protection in the event you touch an
energized circuit - CORRECT ANSWER-False
What type of lighting fixture would you specify if you wanted the best color rendition? -
CORRECT ANSWER-LED
What type of lighting fixture would you specify if you wanted the longest lamp life? -
CORRECT ANSWER-Mercury Vapor
What type of lighting fixture would you specify if you wanted the best overall
combination of cost, efficiency, color rendition, and life? - CORRECT ANSWER-
Fluorescent
What term is used as a measure of light energy? - CORRECT ANSWER-Lumen
What feature is performed by a lighting ballast? - CORRECT ANSWER-All of these are
true:
Provide a high voltage to start the arc
Provides a built-in power factor correction
Maintain the voltage to stabilize the arc
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