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: 8 m 4 m 1 m 2 m 8 m 4 m 1 m 2 m ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Transformer core is laminated to _____ Reduce eddy current losses Reduce all above losses Reduce hysteresis loss Reduce copper losses Reduce eddy current losses Reduce all above losses Reduce hysteresis loss 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.
DGVCL Exam Paper (12-06-2016) In a transformer the energy is conveyed from primary to secondary None of these By the flux Through air Through cooling coil None of these By the flux Through air Through cooling coil 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) Which of the following does not change in a transformer? Current Voltage All of these Frequency Current Voltage All of these Frequency ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In transformer voltage and current can be raised or lowered.Frequency remains samePower and Flux remains almost constant.
DGVCL Exam Paper (12-06-2016) A 17 inch personal computer uses approximately 150 watts in an hour. If you have same computer on for only 4 minutes (for checking e-mail) what would be the power consumption? 0.04 kW 0.01 kW None of these 0.1 kW 0.04 kW 0.01 kW None of these 0.1 kW 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 Isolator Air break circuit breaker Rewireable fuse Oil Circuit breaker Isolator Air break circuit breaker Rewireable fuse ANSWER DOWNLOAD EXAMIANS APP
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