GETCO Exam Paper (30-11-2008) Corona usually occurs when the electrostatic stress in the air around the conductor succeeds 22 kV (maximum value)/cm 6.6 kV (rms value)/cm 30 kV (maximum value)/cm 11 kV (rms value)/cm 22 kV (maximum value)/cm 6.6 kV (rms value)/cm 30 kV (maximum value)/cm 11 kV (rms value)/cm ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) Which loss in a transformer varies significantly with load? Core loss Copper loss Eddy current loss Hysteresis loss Core loss Copper loss Eddy current loss Hysteresis loss ANSWER EXPLANATION DOWNLOAD EXAMIANS APP During O.C test obtained no load losses (core loss)During S.C. test obtained copper loss (load losses)during loaded condition of transformer copper loss more significant than core loss.
GETCO Exam Paper (30-11-2008) In the parallel operation of transformers, which statement is false transformers transformation ratios same transformers voltage ratings same None of these transformers kVA ratings equal transformers transformation ratios same transformers voltage ratings same None of these transformers kVA ratings equal ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The power transmitted will be maximum when reactance is high sending end voltage is more receiving end voltage is more corona losses are least reactance is high sending end voltage is more receiving end voltage is more corona losses are least ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The symmetrical components are used in fault analysis because the number of equations become lesser none of these the result are in terms of symmetrical components the sequence networks do not have mutual couplings the number of equations become lesser none of these the result are in terms of symmetrical components the sequence networks do not have mutual couplings ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) With the increase in mechanical force applied, the contact resistance remains unaltered increases decreases is unpredictable remains unaltered increases decreases is unpredictable ANSWER DOWNLOAD EXAMIANS APP
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