Questions and Correct Answers Graded
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when a cam or vane is moved close to a magnetic levleing switch what occurs? -
CORRECT ANSWER-the switch changes its satate
what best describes the term AC effective voltage ? - CORRECT ANSWER-the
AC voltage required to produce the same power as a DC voltage
, what is the peak voltage of a waveform with 480 VAC RMS? - CORRECT
ANSWER-679 volts
what effect an inductor has on current flow ? - CORRECT ANSWER-it opposes
change
what is meant by the normal state of relay contacts? - CORRECT ANSWER-
contact state without current applied to the coil
what type of wave form is generated by two pole ac generator in one complete
revolution? - CORRECT ANSWER-one full AC cycle
what defines the the period of a ac waveform ? - CORRECT ANSWER-the time
it takes to complete one full cycle .
what is the period of a 120 hz - CORRECT ANSWER-.00833 seconds
a sine wave beginning at 0 degrees will reach positive and negative peaks at what
two points ? - CORRECT ANSWER-90 and 270 degrees