Transformers The efficiency of a transformer, under heavy loads, is comparatively low because secondary output is much less as compared to primary input copper loss becomes high in proportion to the output iron loss is increased considerably voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input copper loss becomes high in proportion to the output iron loss is increased considerably voltage drop both in primary and secondary becomes large ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following insulating materials can withstand the highest temperature safely? Asbestos Glass fibre Cellulose Mica Asbestos Glass fibre Cellulose Mica ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer is an efficient device because it _______ Uses capacitive coupling Is a static device Uses inductive coupling Uses electric coupling Uses capacitive coupling Is a static device Uses inductive coupling Uses electric coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers upto a rating of 250 kVA 3000 kVA 1000 kVA 500 kVA 250 kVA 3000 kVA 1000 kVA 500 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer routine efficiency depends upon Power factor of load Load current Supply frequency Both power factor and load current Power factor of load Load current Supply frequency Both power factor and load current ANSWER DOWNLOAD EXAMIANS APP
Transformers The main reason for generation of harmonics in a transformer could be mechanical vibrations saturation of core fluctuating load poor insulation mechanical vibrations saturation of core fluctuating load poor insulation ANSWER DOWNLOAD EXAMIANS APP
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