GETCO Exam Paper (22-07-2015) For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be 6\7 7\8 2\3 5\6 6\7 7\8 2\3 5\6 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP fractional pitch = Cos( α/2)α is obtain from: (nα/2)=90˚ where n is harmonicα=25.7143˚fractional pitch=6/7
GETCO Exam Paper (22-07-2015) Current chopping phenomenon is related to small inductive current capacitance switching asymmetrical current resistance switching small inductive current capacitance switching asymmetrical current resistance switching ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In a power system network, at which bus the shunt is connected that can be known from type of bus Y bus of the system none of these reactive power demand type of bus Y bus of the system none of these reactive power demand ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The mechanical angle is _____ electrical angle same greater than or equal to always less lesser than or equal to same greater than or equal to always less lesser than or equal to ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Electrical angle = (P/2)*mechanicla angle
GETCO Exam Paper (22-07-2015) No load efficiency of tranformer is _____ than full load efficiency same lesser greater depends on load same lesser greater depends on load ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In differential protection scheme, a stabilizing resistance connected to block harmonics increase the current limit increase the relay sensitivity reduce the effect of non identical CTs block harmonics increase the current limit increase the relay sensitivity reduce the effect of non identical CTs ANSWER DOWNLOAD EXAMIANS APP
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