Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Copper losses are negligible Saving in winding material Eddy losses are totally eliminated Hysteresis losses are reduced Copper losses are negligible Saving in winding material Eddy losses are totally eliminated Hysteresis losses are reduced ANSWER DOWNLOAD EXAMIANS APP
Transformers The flux in the core of a single phase transformer is _____ Partly alternating and partly rotating Purely alternating one Purely rotating one None of the listed here Partly alternating and partly rotating Purely alternating one Purely rotating one None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers To step 110 V ac down to 20 V ac, the turns ratio must be 0.018 0.18 5.5 18 0.018 0.18 5.5 18 ANSWER DOWNLOAD EXAMIANS APP
Transformers A Buchholz relay can be installed on Auto transformer Oil cooled transformer Air-cooled transformer Welding transformer Auto transformer Oil cooled transformer Air-cooled transformer Welding transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The iron core is used to ______of the transformer. None of the listed here Reduce core loss Increase the wight Provide tight magnetic coupling None of the listed here Reduce core loss Increase the wight Provide tight magnetic coupling ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following property is not necessarily desirable in the material for transformer core? High permeability Low hysteresis loss Mechanical strength High thermal conductivity High permeability Low hysteresis loss Mechanical strength High thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
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