Transformers The efficiency of a transformer will be maximum when ______ Copper loss is equal to constant loss Leakage reactance of the two winding Resistance of the two winding are equal None of the listed here Copper loss is equal to constant loss Leakage reactance of the two winding Resistance of the two winding are equal None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers Transformer breaths in when load on it increases None of these load remains constant load on it decreases load on it increases None of these load remains constant load on it decreases ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of colling a power transformer is Natural air cooling Any of the listed here Oil cooling Air blast cooling Natural air cooling Any of the listed here Oil cooling Air blast cooling ANSWER DOWNLOAD EXAMIANS APP
Transformers Losses which occur in rotating electric machines and do not occur in trans formers are hysteresis and eddy current losses friction and windage losses magnetic losses copper losses hysteresis and eddy current losses friction and windage losses magnetic losses copper losses ANSWER DOWNLOAD EXAMIANS APP
Transformers A no-load test is performed on a transformer to determine magnetising current and loss core loss magnetising current efficiency copper loss magnetising current and loss core loss magnetising current efficiency copper loss ANSWER DOWNLOAD EXAMIANS APP
Transformers The no load primary current is about ______of full load primary current. 3-5% 15-30% Above 40% 30-40% 3-5% 15-30% Above 40% 30-40% ANSWER DOWNLOAD EXAMIANS APP
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