DGVCL Exam Paper (12-06-2016) The permissible voltage variation in transmission and distribution system is: ±10% ± 0.1% ± 1% ± 25% ±10% ± 0.1% ± 1% ± 25% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP This answer is as per official key of respective exam.
DGVCL Exam Paper (12-06-2016) The friction losses in Real Transformers are : 0.05 0 0.25 0.5 0.05 0 0.25 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) Which of the following does not change in a transformer? Voltage Frequency Current All of these Voltage Frequency Current All of these 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) For 11 kV line the inductance per km per phase will be of the order of: 1 mH 0.1 H 1 H 0.1 mH 1 mH 0.1 H 1 H 0.1 mH ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: Current will be too much high Transformer may start to smoke and burn No effect Eddy Current and Hysteresis losses will be excessive Current will be too much high Transformer may start to smoke and burn No effect Eddy Current and Hysteresis losses will be excessive ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Core loss of transformer = Hysteresis loss + eddy current lossHysteresis loss prpotional to feddy current loss prpotional to f².
DGVCL Exam Paper (12-06-2016) As per Electricity Act, _____ means any line which is used for carrying electricity for any purpose. Electric line Transmission line None of these All of these Electric line Transmission line None of these All of these ANSWER DOWNLOAD EXAMIANS APP
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