GETCO Exam Paper (22-07-2015) For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be 7\8 2\3 6\7 5\6 7\8 2\3 6\7 5\6 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 city is capital of Meghalaya? (As on 22/07/2015) Dispur Imphal Itanagar Shilong Dispur Imphal Itanagar Shilong ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The Y bus matrix is a sparse matrix because … bus incidence matrix is a sparse matrix no of lines are less lines are connected to less no. of buses Y primitive is a sparse matrix bus incidence matrix is a sparse matrix no of lines are less lines are connected to less no. of buses Y primitive is a sparse matrix ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The instantaneous value of power in purely inductive circuit is zero changing none of this constant zero changing none of this constant ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The instantaneous value of power in purely inductive circuit is changing as it is given as v*i. The average power of purely inductive circuit over a cycle is zero
GETCO Exam Paper (22-07-2015) In synchronous motor, V-curve is a graph of Armature current Vs reactive power Armature current Vs Field current Armature current Vs power factor Armature current Vs active power Armature current Vs reactive power Armature current Vs Field current Armature current Vs power factor Armature current Vs active power ANSWER EXPLANATION DOWNLOAD EXAMIANS APP v curve: armature current → field currentInverted V curve: power factor → field current
GETCO Exam Paper (22-07-2015) In the standard B-H curve X axis and Y axis intercepts respctively represents Hysteresis loss and Flux residual magnetism and coercive force Flux and MMF coercive force and residual magnetism Hysteresis loss and Flux residual magnetism and coercive force Flux and MMF coercive force and residual magnetism ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS