GETCO Exam Paper (30-11-2008) Which loss in a transformer varies significantly with load? Eddy current loss Hysteresis loss Copper loss Core loss Eddy current loss Hysteresis loss Copper loss Core 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) With the increase in mechanical force applied, the contact resistance remains unaltered is unpredictable decreases increases remains unaltered is unpredictable decreases increases ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The arc voltage in a C.B. is _____ with the arc current none of these lagging by 90˚ leading by 90˚ in phase none of these lagging by 90˚ leading by 90˚ in phase ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The recovery voltage will be maximum for p.f. of unity 0.5 zero 0.707 unity 0.5 zero 0.707 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) Power system A is operating in parallel with other systems and has a frequency bias of 50 MW/0.1 Hz. For a loss of generation in one of the interconnected systems resulting in a frequency drop of 0.02 Hz, system A should provide 20 MW of support provide 30 MW support not be affected provide 10 MW of support provide 20 MW of support provide 30 MW support not be affected provide 10 MW of support ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) An AC transmission line requires a VAR input: to improve the regulation to improve stability to increase power transmission to reduce losses to improve the regulation to improve stability to increase power transmission to reduce losses ANSWER DOWNLOAD EXAMIANS APP
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