DGVCL Exam Paper (12-06-2016) Which unit holds data permanently? Primary Memory Unit Output Unit Secondary storage unit Input unit Primary Memory Unit Output Unit Secondary storage unit Input unit 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: 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 No effect Eddy Current and Hysteresis losses will be excessive 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 : 75 kVA 34.64 kVA None of these 20 kVA 75 kVA 34.64 kVA None of these 20 kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For three phase,VA = √3 V IFor single phase, kVA = V I
DGVCL Exam Paper (12-06-2016) The problematic pollutants in emission of coal based generating plants _____ NOx CO SO₂ All of these NOx CO SO₂ All of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following 3-phase connection of a transformer causes interference with the neighbouring communication lines: Star-Star Delta-Delta Delta-Star Star-Delta Star-Star Delta-Delta Delta-Star Star-Delta ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following is the least expensive protection for over current in low voltage system? Isolator Oil Circuit breaker Air break circuit breaker Rewireable fuse Isolator Oil Circuit breaker Air break circuit breaker Rewireable fuse ANSWER DOWNLOAD EXAMIANS APP
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