Transformers The open circuit test on a transformer is always made on ______ High voltage winding Low voltage winding Either low or high voltage winding None of the listed here High voltage winding Low voltage winding Either low or high voltage winding None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers The efficiency of a transformer, under heavy loads, is comparatively low because secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output secondary output is much less as compared to primary input voltage drop both in primary and secondary becomes large iron loss is increased considerably copper loss becomes high in proportion to the output ANSWER DOWNLOAD EXAMIANS APP
Transformers Leakage flux in a transformer occurs because Transformer is not an efficient device Iron core has high permeability Applied voltage is sinusoidal Air is not a good magnetic insulator Transformer is not an efficient device Iron core has high permeability Applied voltage is sinusoidal Air is not a good magnetic insulator ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. Above 40% 15-30% 3-5% 30-40% Above 40% 15-30% 3-5% 30-40% ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is not a fitting on a transformer? Commutator Breather Buchholz's relay Conservator Commutator Breather Buchholz's relay Conservator ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be saturation of core mechanical vibrations poor insulation fluctuating load saturation of core mechanical vibrations poor insulation fluctuating load ANSWER DOWNLOAD EXAMIANS APP
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