Transformers What is the approximate efficiency of large transformers? 65% 85% 75% 95 % 65% 85% 75% 95 % ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following acts as a protection against high voltage surges due to lightning and switching? Thermal overload relays Breather Conservator Horn gaps Thermal overload relays Breather Conservator Horn gaps ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Eddy losses are totally eliminated Copper losses are negligible Hysteresis losses are reduced Saving in winding material Eddy losses are totally eliminated Copper losses are negligible Hysteresis losses are reduced Saving in winding material ANSWER DOWNLOAD EXAMIANS APP
Transformers If a transformer core has air gaps, then, _________ Hysteresis loss is decreased Reluctance of magnetic path is decreased Eddy current is increased Magnetising current is greatly increased Hysteresis loss is decreased Reluctance of magnetic path is decreased Eddy current is increased Magnetising current is greatly increased ANSWER DOWNLOAD EXAMIANS APP
Transformers A common method of colling a power transformer is Air blast cooling Natural air cooling Any of the listed here Oil cooling Air blast cooling Natural air cooling Any of the listed here Oil cooling ANSWER DOWNLOAD EXAMIANS APP
Transformers The all day efficiency of a transformer is ______ the commercial efficiency. Less than More than The same as None of the listed here Less than More than The same as None of the listed here ANSWER DOWNLOAD EXAMIANS APP
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