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 34.64 kVA None of these 75 kVA 20 kVA 34.64 kVA None of these 75 kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For three phase,VA = √3 V IFor single phase, kVA = V I
DGVCL Exam Paper (12-06-2016) GUVNL is: None of these Gujarat Urja Vikas Nikash Limited Gujarat Urja Vikas Nigam Limited Gujarat Urja Vyapar Nigam Limited None of these Gujarat Urja Vikas Nikash Limited Gujarat Urja Vikas Nigam Limited Gujarat Urja Vyapar Nigam Limited ANSWER EXPLANATION DOWNLOAD EXAMIANS APP PGVCL: Paschim Gujarat Vij Company LimitedMGVCL: Madhya Gujarat Vij Company LimitedUGVCL: Uttar Gujarat Vij Company LimitedDGVCL: Dakshin Gujarat Vij Company LimitedGETCO: Gujarat Energy Transmission CorportationGSECL: Gujarat State Elecricity Corporation Limited
DGVCL Exam Paper (12-06-2016) The friction losses in Real Transformers are : 0.05 0.5 0.25 0 0.05 0.5 0.25 0 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP As there is no rotating part in transformer, there is no friction and windage loss
DGVCL Exam Paper (12-06-2016) Transformer core is laminated to _____ Reduce eddy current losses Reduce hysteresis loss Reduce copper losses Reduce all above losses Reduce eddy current losses Reduce hysteresis loss Reduce copper losses Reduce all above losses ANSWER EXPLANATION DOWNLOAD EXAMIANS APP To reduce eddy current loss laminations is done.To reduce hysteresis loss good magnetic material (whose specific hysterisis loss is low) is used.
DGVCL Exam Paper (12-06-2016) Step-down transformer converts high voltage and low current into: None of these How voltage and high current High voltage and low current Low voltage and high current None of these How voltage and high current High voltage and low current Low voltage and high 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.
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