GETCO Exam Paper (22-07-2015) Earth wire on EHV overhead transmission line is provided to protect the line against switching surge corona effect lightning surge excessive fault voltages switching surge corona effect lightning surge excessive fault voltages ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is unity lagging leading zero unity lagging leading 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
GETCO Exam Paper (22-07-2015) 100% string efficiency means Zero potential across each disc Equal potential across each disc None uniform potential distribution across each disc One of the insulator discs shorted Zero potential across each disc Equal potential across each disc None uniform potential distribution across each disc One of the insulator discs shorted ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For a given transformer volte/turn for primary and secondary winding is depends on load depends on transformer design different same depends on load depends on transformer design different same ANSWER EXPLANATION DOWNLOAD EXAMIANS APP emf = 4.44*f*φ*Temf/T = 4.44*f*φ
GETCO Exam Paper (22-07-2015) For given kVAR and line voltage the ratio of star to delta value of capacitor is 1.73 1 3 0.33333333333333 1.73 1 3 0.33333333333333 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In load flow analysis, the load at the bus is represented as a constant current drawn from the bus a constant impedance connected at the bus a voltag dependent impedance at the bus none of these a constant current drawn from the bus a constant impedance connected at the bus a voltag dependent impedance at the bus none of these ANSWER DOWNLOAD EXAMIANS APP
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