GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is unity zero leading lagging unity zero leading lagging 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) Laplace transforms is used for converting non linear equation to linear equation converting diffential equation to algebraic equation finding transfer function of any systems for finding initial condition in a system converting non linear equation to linear equation converting diffential equation to algebraic equation finding transfer function of any systems for finding initial condition in a system ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In load flow analysis, the load at the bus is represented as 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 a constant current drawn from the bus ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Calculate torque developed by the 3-phase, 5 HP, 4 pole induction motor runs at 1500 rpm 0 N-m 22 N-m 23.5 N-m 10 N-m 0 N-m 22 N-m 23.5 N-m 10 N-m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP P = 2πTN/60 where N is speed in rpm
GETCO Exam Paper (22-07-2015) Earth wire on EHV overhead transmission line is provided to protect the line against switching surge corona effect excessive fault voltages lightning surge switching surge corona effect excessive fault voltages lightning surge 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 Y bus of the system reactive power demand none of these type of bus Y bus of the system reactive power demand none of these type of bus ANSWER DOWNLOAD EXAMIANS APP
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