GETCO Exam Paper (30-11-2008) In the parallel operation of transformers, which statement is false transformers kVA ratings equal transformers voltage ratings same transformers transformation ratios same None of these transformers kVA ratings equal transformers voltage ratings same transformers transformation ratios same None of these ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) Which loss in a transformer varies significantly with load? Hysteresis loss Copper loss Core loss Eddy current loss Hysteresis loss Copper loss Core loss Eddy current 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) Corona usually occurs when the electrostatic stress in the air around the conductor succeeds 11 kV (rms value)/cm 22 kV (maximum value)/cm 30 kV (maximum value)/cm 6.6 kV (rms value)/cm 11 kV (rms value)/cm 22 kV (maximum value)/cm 30 kV (maximum value)/cm 6.6 kV (rms value)/cm ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) A CB under normal conditions, should be inspected once in a month 3 or 6 months 5 years a week a month 3 or 6 months 5 years a week ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The voltage regulation of a transformer at full load and 0.8 power factor lagging is 2.5%. The voltage regulation at full load, 0.8 power factor leading will be -2.5% 2.5% zero 0.01 -2.5% 2.5% zero 0.01 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) An AC transmission line requires a VAR input: to improve stability to improve the regulation to reduce losses to increase power transmission to improve stability to improve the regulation to reduce losses to increase power transmission ANSWER DOWNLOAD EXAMIANS APP
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