DGVCL Exam Paper (12-06-2016) Transformer core is laminated to _____ Reduce hysteresis loss Reduce copper losses Reduce eddy current losses Reduce all above losses Reduce hysteresis loss Reduce copper losses Reduce eddy current losses Reduce all above 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) Core type transformers are popular in _____ High voltage applications None of these All of these Low voltage applications High voltage applications None of these All of these Low voltage applications ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) For a 66 kV line having span of 200 meters between towers the approximate sag will be 2 m. If the span is double the sag will be: 1 m 4 m 8 m 2 m 1 m 4 m 8 m 2 m ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following is the least expensive protection for over current in low voltage system? Oil Circuit breaker Rewireable fuse Air break circuit breaker Isolator Oil Circuit breaker Rewireable fuse Air break circuit breaker Isolator ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) A circuit breaker is designed to protect an electrical circuit from damage caused by : Over current All of these Short circuit Over load Over current All of these Short circuit Over load ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The following formula is correct: All of these Load facto r= Average load for a period/Peak load for the same period Load factor = Average load for a period + Peak load for the same period Load factor = Average load for a period x Peak load for the same period All of these Load facto r= Average load for a period/Peak load for the same period Load factor = Average load for a period + Peak load for the same period Load factor = Average load for a period x Peak load for the same period ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS