DGVCL Exam Paper (12-06-2016) The friction losses in Real Transformers are : 0.05 0.25 0.5 0 0.05 0.25 0.5 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) The core construction is like spokes of a wheel in following transformer: Shell Type Transformer Berry Type Transformer None of these Core Type Transformer Shell Type Transformer Berry Type Transformer None of these Core Type Transformer ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The process of a computer receiving information from a server via Internet is known as: Downloading All of these Uploading Retrieving Downloading All of these Uploading Retrieving ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The transformer works on the principle of: Mutual induction Mutual capacitance None of these All of these Mutual induction Mutual capacitance None of these All 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) A _____ is used to measure the stator % winding temperature of the generator. Thermometer Thermocouple Resistance thermometer Pyrometer Thermometer Thermocouple Resistance thermometer Pyrometer 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 Eddy Current and Hysteresis losses will be excessive No effect Transformer may start to smoke and burn Current will be too much high Eddy Current and Hysteresis losses will be excessive 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.
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