DGVCL Exam Paper (12-06-2016) Earthing switch is used for? Measuring of safety voltage Discharging residual energies All of these Protection of equipment from ground faults Measuring of safety voltage Discharging residual energies All of these Protection of equipment from ground faults ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Transformer has _____ Auxiliary winding and secondary winding None of these Primary winding and Auxiliary winding Primary winding and secondary winding Auxiliary winding and secondary winding None of these Primary winding and Auxiliary winding Primary winding and secondary winding ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The transformer works on the principle of: None of these Mutual capacitance All of these Mutual induction None of these Mutual capacitance All of these Mutual induction ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Transformer is static device.two or more stationary electrical circuit mutually linked by magnetic circuit.assumptions of ideal transformer:1. there are no losses.2. whole magnetic flux constant no leakage.3. permeability of core is infinite.
DGVCL Exam Paper (12-06-2016) Which of the following is the product of data processing: Software programme System Information Data Software programme System Information Data ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The SI unit of energy is : Newton Coulomb Henry Joule Newton Coulomb Henry Joule 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: 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 Eddy Current and Hysteresis losses will be excessive Current will be too much high 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.
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