GETCO Exam Paper (22-07-2015) In rotating electrical machines, the insulation temperature limit for class B type is 180˚C 130˚C 150˚C 105˚C 180˚C 130˚C 150˚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) In a DC motor, back EMF value becomes maximum at _____ full load 3/4 load no load 1/2 load full load 3/4 load no load 1/2 load ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Answer in official key is “1/2 load ”.
GETCO Exam Paper (22-07-2015) In G-S method of power flow problem, the number of iterations _____ depends on no of buses depends on voltage control buses depends on tolerance remains fixed depends on no of buses depends on voltage control buses depends on tolerance remains fixed ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) I am looking _____ my pen. Have you seen it? to after for at to after for at ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For a given transformer volte/turn for primary and secondary winding is same depends on transformer design different depends on load same depends on transformer design different depends on load ANSWER EXPLANATION DOWNLOAD EXAMIANS APP emf = 4.44*f*φ*Temf/T = 4.44*f*φ
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is lagging unity zero leading lagging unity zero 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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