DGVCL Exam Paper (12-06-2016) Efficiency of a power transformer is of the order of : 0.98 0.5 0.25 1 0.98 0.5 0.25 1 ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The consumer of electricity could be: Domestic All of these Industrial and Commercial Agricultural Domestic All of these Industrial and Commercial Agricultural 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: Eddy Current and Hysteresis losses will be excessive Transformer may start to smoke and burn No effect Current will be too much high Eddy Current and Hysteresis losses will be excessive Transformer may start to smoke and burn No effect Current will be too much high 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 kVA rating of Three-phase transformer with Voltage = 200 V and Current = 100 A will be : 20 kVA 75 kVA None of these 34.64 kVA 20 kVA 75 kVA None of these 34.64 kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For three phase,VA = √3 V IFor single phase, kVA = V I
DGVCL Exam Paper (12-06-2016) In a transformer the energy is conveyed from primary to secondary By the flux Through air Through cooling coil None of these By the flux Through air Through cooling coil None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP function of transfomer is that transfer electrical energy from primary cicuit to secondary through magnetic cicuit by mutual induction
DGVCL Exam Paper (12-06-2016) Cylindrical type transformer has: All of these Single magnetic circuit None of these Double magnetic circuit All of these Single magnetic circuit None of these Double magnetic circuit ANSWER DOWNLOAD EXAMIANS APP
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