Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Saving in winding material Hysteresis losses are reduced Eddy losses are totally eliminated Copper losses are negligible Saving in winding material Hysteresis losses are reduced Eddy losses are totally eliminated Copper losses are negligible ANSWER DOWNLOAD EXAMIANS APP
Transformers What is the coefficient of coupling for a transformer in which 4% of the total flux generated in the primary does not pass through the secondary? 4 0.96 0.4 9.6 4 0.96 0.4 9.6 ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer oil must be free from Sludge Odour Gases Moisture Sludge Odour Gases Moisture ANSWER DOWNLOAD EXAMIANS APP
Transformers The maximum flux produced in the core of a transformer is ______ Inversely proportional to primary voltage Inversely proportional to supply frequency None of the listed here Directly proportional to supply frequency Inversely proportional to primary voltage Inversely proportional to supply frequency None of the listed here Directly proportional to supply frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 . What is the approximate voltage across the load? 7.3 V 73 V 88 V 880 V 7.3 V 73 V 88 V 880 V ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following acts as a protection against high voltage surges due to lightning and switching? Conservator Horn gaps Breather Thermal overload relays Conservator Horn gaps Breather Thermal overload relays ANSWER DOWNLOAD EXAMIANS APP
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