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) _____ electric power is the most common method used by electrical grids to transfer power Three-phase One-phase Two-phase None of these Three-phase One-phase Two-phase None of these ANSWER DOWNLOAD EXAMIANS APP
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 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 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 time of closing the cycle, in modern circuit breakers is 0.003 sec. 0.001 sec. 0.01 sec. 0.1 sec. 0.003 sec. 0.001 sec. 0.01 sec. 0.1 sec. ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The main disadvantages of having poor power factors are: All of these Poor voltage regulation High energy loss in conductor High cost of station and distribution equipment All of these Poor voltage regulation High energy loss in conductor High cost of station and distribution equipment ANSWER DOWNLOAD EXAMIANS APP
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