GETCO Exam Paper (22-07-2015) HVDC transmission is preferred to EHV AC because Harmonic problem is avoided VAR compensation is not required in it Its terminal equipment are inexpensive System stability can be improved Harmonic problem is avoided VAR compensation is not required in it Its terminal equipment are inexpensive System stability can be improved 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 same depends on transformer design different depends on load same depends on transformer design different ANSWER EXPLANATION DOWNLOAD EXAMIANS APP emf = 4.44*f*φ*Temf/T = 4.44*f*φ
GETCO Exam Paper (22-07-2015) In load flow analysis, the load at the bus is represented as a voltag dependent impedance at the bus a constant impedance connected at the bus none of these a constant current drawn from the bus a voltag dependent impedance at the bus a constant impedance connected at the bus none of these a constant current drawn from the bus ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following is not function of substation batteries? operating automatic control circuits emergency lighting circuits operating protective relay systems provide supply to the excitation system operating automatic control circuits emergency lighting circuits operating protective relay systems provide supply to the excitation system ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The value of holding ratio of relay is always Infinite less than 1 greater than 1 zero Infinite less than 1 greater than 1 zero ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is lagging zero unity leading lagging zero unity leading 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
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