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
DGVCL Exam Paper (12-06-2016) A relay used for protection of motors against overload is : Electromagnetic attraction type Impedance relay Buchholz's relay Thermal relay Electromagnetic attraction type Impedance relay Buchholz's relay Thermal relay ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Reactance relay is used for protection against: Over voltage fault Phase fault None of these Earth fault Over voltage fault Phase fault None of these Earth fault ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) For 11 kV line the capacitance per km per phase will be of the order of: 1 Farad 0.1 Farad 0.01 microF 0.01 Farad 1 Farad 0.1 Farad 0.01 microF 0.01 Farad 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: 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 Current will be too much high Transformer may start to smoke and burn 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) The arc temperature in Oil Circuit Breaker may reach up to _____ 10,000° K 8,000° K None of these 5,000° K 10,000° K 8,000° K None of these 5,000° K ANSWER DOWNLOAD EXAMIANS APP
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