DGVCL Exam Paper (12-06-2016) The friction losses in Real Transformers are : 0.25 0.5 0.05 0 0.25 0.5 0.05 0 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) Transformer core is laminated to _____ Reduce hysteresis loss Reduce copper losses Reduce all above losses Reduce eddy current losses Reduce hysteresis loss Reduce copper losses Reduce all above losses Reduce eddy current 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.
DGVCL Exam Paper (12-06-2016) Step-down transformer converts high voltage and low current into: Low voltage and high current None of these High voltage and low current How voltage and high current Low voltage and high current None of these High voltage and low current How voltage and high current ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In step up votlage,Output votlage > Input votlageOutput current < Input currentIn step down transformerOutput votlage < Input votlageOutput current > Input current.Power and frequency remains almost constant in stepup or stepdown transformer.
DGVCL Exam Paper (12-06-2016) The permissible voltage variation in transmission and distribution system is: ±10% ± 1% ± 25% ± 0.1% ±10% ± 1% ± 25% ± 0.1% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP This answer is as per official key of respective exam.
DGVCL Exam Paper (12-06-2016) A Transformer _____ Changes DC to AC Steps up or down DC Voltages & Current Changes AC to DC Steps up or down AC Voltages & Current Changes DC to AC Steps up or down DC Voltages & Current Changes AC to DC Steps up or down AC Voltages & Current ANSWER DOWNLOAD EXAMIANS APP
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