GETCO Exam Paper (22-07-2015) Earth wire on EHV overhead transmission line is provided to protect the line against excessive fault voltages corona effect switching surge lightning surge excessive fault voltages corona effect switching surge lightning surge ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The Y bus matrix is a sparse matrix because … lines are connected to less no. of buses bus incidence matrix is a sparse matrix no of lines are less Y primitive is a sparse matrix lines are connected to less no. of buses bus incidence matrix is a sparse matrix no of lines are less Y primitive is a sparse matrix ANSWER DOWNLOAD EXAMIANS APP
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) Which power plant may take several days to start up and shunt down? solar power plant Base load Peak load none of these solar power plant Base load Peak load none of these ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In rotating electrical machines, the insulation temperature limit for class B type is 130˚C 180˚C 105˚C 150˚C 130˚C 180˚C 105˚C 150˚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) Calculate torque developed by the 3-phase, 5 HP, 4 pole induction motor runs at 1500 rpm 23.5 N-m 0 N-m 22 N-m 10 N-m 23.5 N-m 0 N-m 22 N-m 10 N-m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP P = 2πTN/60 where N is speed in rpm
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