Transformers Which of the following is the main advantage of an auto-transformer over a two winding transformer? Copper losses are negligible Eddy losses are totally eliminated Saving in winding material Hysteresis losses are reduced Copper losses are negligible Eddy losses are totally eliminated Saving in winding material Hysteresis losses are reduced ANSWER DOWNLOAD EXAMIANS APP
Transformers To step 110 V ac down to 20 V ac, the turns ratio must be 0.018 5.5 0.18 18 0.018 5.5 0.18 18 ANSWER DOWNLOAD EXAMIANS APP
Transformers Natural oil cooling is used for transformers up to a rating of 3000 kVA 250 kVA 1000 kVA 500 kVA 3000 kVA 250 kVA 1000 kVA 500 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers The permissible flux density in case of cold rolled grain oriented steel is around 4.7 Wb/m² 2.7 Wb/m² 3.7 Wb/m² 1.7 Wb/m² 4.7 Wb/m² 2.7 Wb/m² 3.7 Wb/m² 1.7 Wb/m² ANSWER DOWNLOAD EXAMIANS APP
Transformers Distribution transformers are generally designed for maximum efficiency around 50% load 90% load Zero load 25% load 50% load 90% load Zero load 25% load ANSWER DOWNLOAD EXAMIANS APP
Transformers The temperature rise of transformer is directly proportional to _______ Reactive power Leakage reactance None of the listed here Apparent power Reactive power Leakage reactance None of the listed here Apparent power ANSWER DOWNLOAD EXAMIANS APP
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