DGVCL Exam Paper (12-06-2016) What will happen if the primary of a transformer is connected to DC supply? Transformer will operate with low efficiency No effect Transformer will operate with high efficiency Transformer may start to smoke and burn Transformer will operate with low efficiency No effect Transformer will operate with high efficiency Transformer may start to smoke and burn 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) Transformer has _____ Primary winding and Auxiliary winding Auxiliary winding and secondary winding Primary winding and secondary winding None of these Primary winding and Auxiliary winding Auxiliary winding and secondary winding Primary winding and secondary winding None of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Earthing switch is used for? Protection of equipment from ground faults All of these Discharging residual energies Measuring of safety voltage Protection of equipment from ground faults All of these Discharging residual energies Measuring of safety voltage ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) In case the height of transmission tower is increased, which of the following parameter is likely to change? Capacitance Inductance None of these Resistance Capacitance Inductance None of these Resistance ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The SI unit of energy is : Coulomb Henry Newton Joule Coulomb Henry Newton Joule 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
EXAMIANS