DGVCL Exam Paper (12-06-2016) In a transformer the energy is conveyed from primary to secondary None of these By the flux Through cooling coil Through air None of these By the flux Through cooling coil Through air ANSWER EXPLANATION DOWNLOAD EXAMIANS APP function of transfomer is that transfer electrical energy from primary cicuit to secondary through magnetic cicuit by mutual induction
DGVCL Exam Paper (12-06-2016) The friction losses in Real Transformers are : 0 0.25 0.05 0.5 0 0.25 0.05 0.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP As there is no rotating part in transformer, there is no friction and windage loss
DGVCL Exam Paper (12-06-2016) Wave trap is used to trap waves of: None of these All of these Power frequencies Higher frequencies entering generator or transformer units None of these All of these Power frequencies Higher frequencies entering generator or transformer units ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following is not a part of transformer installation? Buchholz Relay Breather Conservator Exciter Buchholz Relay Breather Conservator Exciter ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Exciter is used in alternator for field supply.
DGVCL Exam Paper (12-06-2016) The Minimum Oil Circuit Breaker (MOCB) is named because of : Reduced requirement of air All of these Reduced requirement of oil None of these Reduced requirement of air All of these Reduced requirement of oil None of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Transformer core is laminated to _____ Reduce hysteresis loss Reduce eddy current losses Reduce all above losses Reduce copper losses Reduce hysteresis loss Reduce eddy current losses Reduce all above losses Reduce copper losses ANSWER EXPLANATION DOWNLOAD EXAMIANS APP To reduce eddy current loss laminations is done.To reduce hysteresis loss good magnetic material (whose specific hysterisis loss is low) is used.
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