DGVCL Exam Paper (12-06-2016) The kVA rating of Three-phase transformer with Voltage = 200 V and Current = 100 A will be : 75 kVA 34.64 kVA 20 kVA None of these 75 kVA 34.64 kVA 20 kVA None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For three phase,VA = â3 V IFor single phase, kVA = V I
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 Current will be too much high No effect Transformer may start to smoke and burn Eddy Current and Hysteresis losses will be excessive Current will be too much high No effect 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) A 100-watt light bulb turned on for 8 hours uses : 8 kWh 0.8 kWh 800 Wh None of these 8 kWh 0.8 kWh 800 Wh None of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In Solution 0.8 kWh and 800 Wh both options are given as answer as both are correct
DGVCL Exam Paper (12-06-2016) The SI unit of energy is : Newton Henry Joule Coulomb Newton Henry Joule Coulomb ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The rating of transformer may be expressed in _____ Horse power kW kVAR kVA Horse power kW kVAR kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Equipment : RatingTransformer : kVAAlternator : kVAMotor : kW/HPBattery : ampere-hour
DGVCL Exam Paper (12-06-2016) For 11 kV line the inductance per km per phase will be of the order of: 0.1 mH 1 H 0.1 H 1 mH 0.1 mH 1 H 0.1 H 1 mH ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS