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Engine_2014 : Electricity - 62/2299
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A main switchboard synchronizing panel is fitted with two synchronizing lamps and a synchroscope.  When paralleling, if the synchroscope pointer is at the noon position and one synchronizing light is bright while the other remains dark, what does this indicate?
A) the incoming generator voltage is too low
B) the generators are out of phase sequence and one lamp is burned out
C) the generators are in phase sequence but one lamp is burned out
D) the generator breaker may be closed
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