GETCO Exam Paper (22-07-2015) Switching surges are short duration transient voltage power frequency voltage high votage DCs high voltage Acs short duration transient voltage power frequency voltage high votage DCs high voltage Acs ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For given kVAR and line voltage the ratio of star to delta value of capacitor is 3 1.73 1 0.33333333333333 3 1.73 1 0.33333333333333 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be 5\6 6\7 2\3 7\8 5\6 6\7 2\3 7\8 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) The fault occurring in transmission actually are mostly L-L L-G L-L-G L-L-L L-L L-G L-L-G L-L-L ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) "Overshoot" in a time response of control systems is indication of none of this final value of the output steady state solution measure of relative stability none of this final value of the output steady state solution measure of relative stability ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is lagging leading unity zero lagging leading unity zero ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Voltage regulation = ((no load voltage)-(full load voltage)/(no load voltage))VR at leading PF = ((I*R*cosφ)-(I*X*sinφ))/VVR at lagging PF = ((I*R*cosφ)+(I*X*sinφ))/V