DGVCL Exam Paper (12-06-2016) The friction losses in Real Transformers are : 0.5 0 0.25 0.05 0.5 0 0.25 0.05 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) 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) Admittance relay is _____ relay. Non-directional Directional Impedance None of these Non-directional Directional Impedance None of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The transformer works on the principle of: Mutual induction All of these Mutual capacitance None of these Mutual induction All of these Mutual capacitance None of these 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) Wave trap is used to trap waves of: Power frequencies Higher frequencies entering generator or transformer units None of these All of these Power frequencies Higher frequencies entering generator or transformer units None of these All of these ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The Electricity Act is applicable in _____ All parts of India except state of Jammu and Kashmir In Gujarat only All parts of India All the states of India All parts of India except state of Jammu and Kashmir In Gujarat only All parts of India All the states of India ANSWER DOWNLOAD EXAMIANS APP
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