DGVCL Exam Paper (12-06-2016) Efficiency of a power transformer is of the order of : 0.25 0.98 0.5 1 0.25 0.98 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The main advantage of AC over DC is: All of these AC is easy to maintain & can be easily distributed at long distances Conversion flexibility from one voltage level to other AC can be easily converted into DC by using a rectifier All of these AC is easy to maintain & can be easily distributed at long distances Conversion flexibility from one voltage level to other AC can be easily converted into DC by using a rectifier ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Step-down transformer converts high voltage and low current into: None of these Low voltage and high current How voltage and high current High voltage and low current None of these Low voltage and high current How voltage and high current High voltage and low current ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In step up votlage,Output votlage > Input votlageOutput current < Input currentIn step down transformerOutput votlage < Input votlageOutput current > Input current.Power and frequency remains almost constant in stepup or stepdown transformer.
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: Current will be too much high Transformer may start to smoke and burn Eddy Current and Hysteresis losses will be excessive No effect Current will be too much high Transformer may start to smoke and burn Eddy Current and Hysteresis losses will be excessive No effect 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) For 11 kV line the capacitance per km per phase will be of the order of: 0.01 microF 0.01 Farad 1 Farad 0.1 Farad 0.01 microF 0.01 Farad 1 Farad 0.1 Farad ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The following is a Transmission Company: GETCO MGVCL GERC DGVCL GETCO MGVCL GERC DGVCL ANSWER DOWNLOAD EXAMIANS APP
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