GETCO Exam Paper (22-07-2015) In rotating electrical machines, the insulation temperature limit for class B type is 130˚C 150˚C 180˚C 105˚C 130˚C 150˚C 180˚C 105˚C ANSWER EXPLANATION DOWNLOAD EXAMIANS APP insulation Class and temperature limit(in ˚C) is given below:Y - 90A- 105E- 120B-130F-155H-180C- above 180
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is unity leading zero lagging unity leading zero 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) In case of HVDC transmission there is _____ both charging effect and skin effect no charging current no skin effect charging current but no skin effect no charging current but skin effect both charging effect and skin effect no charging current no skin effect charging current but no skin effect no charging current but skin effect ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following is the most likely reason for large overshoot in a control system? High gain in a system high retarding torque presence of dead time delay high positive correcting torque High gain in a system high retarding torque presence of dead time delay high positive correcting torque ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The magnitude of sum of two sinusoidal AC voltages is equal to the magnitude of each individual voltage, What must be the phase difference between voltages? 180 60 120 90 180 60 120 90 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The relay which is most sensitive to power swings (mal operation) is Reactance Relay Mho Relay Impedance Relay Over current Relay Reactance Relay Mho Relay Impedance Relay Over current Relay ANSWER DOWNLOAD EXAMIANS APP
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