DGVCL Exam Paper (12-06-2016) The voltage of transmission can be regulated by Switching in shunt capacitors at the receiving end during heavy loads Use of tap changing transformers Any of the above methods Use of capacitors to neutralize the effect of series reactance Switching in shunt capacitors at the receiving end during heavy loads Use of tap changing transformers Any of the above methods Use of capacitors to neutralize the effect of series reactance ANSWER DOWNLOAD EXAMIANS APP
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) What will happen if the primary of a transformer is connected to DC supply? Transformer may start to smoke and burn Transformer will operate with high efficiency Transformer will operate with low efficiency No effect Transformer may start to smoke and burn Transformer will operate with high efficiency Transformer will operate with low efficiency No effect ANSWER EXPLANATION DOWNLOAD EXAMIANS APP transformer works on principle of faraday's law of electromagnetic induction. So if D.C supply use, no indction are produced and due to this E.M.F not induced in winding and transfer of electrical energy is not possible.
DGVCL Exam Paper (12-06-2016) The permissible voltage variation in transmission and distribution system is: ± 25% ±10% ± 1% ± 0.1% ± 25% ±10% ± 1% ± 0.1% ANSWER EXPLANATION DOWNLOAD EXAMIANS APP This answer is as per official key of respective exam.
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: 2 m 1 m 4 m 8 m 2 m 1 m 4 m 8 m ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The Minimum Oil Circuit Breaker (MOCB) is named because of : None of these Reduced requirement of oil All of these Reduced requirement of air None of these Reduced requirement of oil All of these Reduced requirement of air ANSWER DOWNLOAD EXAMIANS APP
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