Final Exam Electrical (NCCER) Exam Questions with Correct Answers
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Course
NCCER Electrical
Institution
NCCER Electrical
Which of the following is the most important advantage of AC power over DC power?
A. Easy to change the values of I and E
B. Easy to Generate
C. Saves weight
D. None of the Above - Answer-Easy to change the values of I and E
__________ is created by the AC generator.
A. rectifier
B. sine...
Final Exam Electrical (NCCER) Exam
Questions with Correct Answers
Which of the following is the most important advantage of AC power over DC power?
A. Easy to change the values of I and E
B. Easy to Generate
C. Saves weight
D. None of the Above - Answer-Easy to change the values of I and E
__________ is created by the AC generator.
A. rectifier
B. sine wave
C. peak-to-peak RMS
D. direct current - Answer-Sine Wave
One half of a sine wave is called a ____________.
A. RMS wave
B. Period
C. Alternation
D. Cycle - Answer-Alternation
The measured value from the maximum positive to the maximum negative values of
voltage or current is called __________ values.
A. RMS
B. Peak-to-Peak
C. Period
D. Alternation
E. Cycle - Answer-Peak-to-Peak
AC Voltmeters measure in ________ values.
A. RMS
B. Peak-to-Peak
C. Average
D. Alternation Squared - Answer-RMS
___________ is the angular relationship between the peak values of I and E.
A. Phase
B. Peak-to-Peak
C. Average Cos. angle
D. Alternation Squared Phase - Answer-Phase
RMS values = _________ of the peak value.
A. Right Most angle Squared
B. .707
, C. Average Cos. angle
D. .632 - Answer-.707
If a circuit has a peak voltage of 310.2 vac, what is the RMS voltage?
A. 219 watts
B. 189 watts
C. 310 volts
D. 195 volts - Answer-219 watts (310x.707=219)
If an AC generator has 8 poles and the rotor turns at 1,800 RPM, what is the frequency
of AC produced in Hz.?
A. 219
B. 120
C. 310
D. 189 - Answer-120 (8/2x1800/60=120)
The useful Power generated in an AC circuit is called __________ Power.
A. True
B. Apparent
C. Factor
D. Cos. - Answer-True
True power is that produced by I and E which is _________ phase.
A. In
B. Out
C. None of the above - Answer-In
The amount of I and E which are in phase is also called the:
A. True Power
B. Apparent Power
C. Power Factor
D. Cos. Factor - Answer-True Power
If the peak voltage is 110 vac, and the peak current is 13 amps, what is the Apparent
Power? (in volt-amps)
A. 1,430 va
B. 430 va
C. 51 va
D. none of the above - Answer-None of the Above ((110x.707)x(13x.707))
If the RMS voltage is 220 vac, the RMS current is 3.5 amps, and the Phase Angle 54
degrees, what is the True Power (in watts to two decimal places)?
A. 900.73
B. 866.83
C. 199.28
D. 317.68
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