GETCO Exam Paper (22-07-2015) In rotating electrical machines, the insulation temperature limit for class B type is 105˚C 150˚C 130˚C 180˚C 105˚C 150˚C 130˚C 180˚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 _____ 1/2 load full load no load 3/4 load 1/2 load full load no load 3/4 load ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Answer in official key is “1/2 load ”.
GETCO Exam Paper (22-07-2015) For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be 2\3 5\6 6\7 7\8 2\3 5\6 6\7 7\8 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP fractional pitch = Cos( α/2)α is obtain from: (nα/2)=90˚ where n is harmonicα=25.7143˚fractional pitch=6/7
GETCO Exam Paper (22-07-2015) The Z matrix of 2 port network is given by [0.9 0.2 : 0.2 0.6]. The element Y22 of the corresponding Y matrix of the same network is given by 1.2 -0.4 0.4 1.8 1.2 -0.4 0.4 1.8 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Who is the 2012 London Olympics bronze medalist in badminton? Saina Sania Jwala Gutta Ashwini Ponnappa Saina Sania Jwala Gutta Ashwini Ponnappa ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is lagging unity leading zero lagging unity 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
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