GETCO Exam Paper (30-11-2008) In a dry type transformer, accumulation of dust on the windings and core is likely to cause short circuiting of secondary winding reduction in heat dissipation corrosion of core material short circuiting of primary winding short circuiting of secondary winding reduction in heat dissipation corrosion of core material short circuiting of primary winding ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) In a transformer it is difficult to measure the efficiency by output-input measurement methods because losses are abnormally high efficiency of transformer is usually high and hence extremely accurate measurements will be necessary the output is sinusoidal and hence cannot be measured output is out of phase with respect to input losses are abnormally high efficiency of transformer is usually high and hence extremely accurate measurements will be necessary the output is sinusoidal and hence cannot be measured output is out of phase with respect to input ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) Transfer of power between two power systems takes place with power flowing from the system with the Higher voltage level Greater leading power angle Higher input current Lagging power angle Higher voltage level Greater leading power angle Higher input current Lagging power angle ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) A CB under normal conditions, should be inspected once in 3 or 6 months a week 5 years a month 3 or 6 months a week 5 years a month ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The relay best suited for phase fault relaying for medium transmission line is impedance relay reactance relay mho relay none of these impedance relay reactance relay mho relay none of these ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) Which loss in a transformer varies significantly with load? Eddy current loss Core loss Copper loss Hysteresis loss Eddy current loss Core loss Copper 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.
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