Transformers A transformer transfers electrical energy from primary to secondary usually with a change in ______ Time period Power Voltage Frequency Time period Power Voltage Frequency ANSWER DOWNLOAD EXAMIANS APP
Transformers The hum in a transformer is mainly attributed to magnetostriction mechanical vibrations load changes oil in the transformer magnetostriction mechanical vibrations load changes oil in the transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers A tap changer is used on a transformer for Adjustment in both primary and secondary Adjustment in primary voltage Adjustments in secondary voltage None of the listed here Adjustment in both primary and secondary Adjustment in primary voltage Adjustments in secondary voltage None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Transformers What kVA rating is required for a transformer that must handle a maximum load current of 8 A with a secondary voltage of 2 kV? 0.25 kVA 4 kVA 8 kVA 16 kVA 0.25 kVA 4 kVA 8 kVA 16 kVA ANSWER DOWNLOAD EXAMIANS APP
Transformers Which of the following transformer should never have the secondary open circuited while the primary is energised? Current transformer Potential transformer Auto transformer Power transformer Current transformer Potential transformer Auto transformer Power transformer ANSWER DOWNLOAD EXAMIANS APP
Transformers The primary and secondary windings are wound on the top of each other in order to reduce ______ Winding resistance Copper losses Leakage reactance Iron losses Winding resistance Copper losses Leakage reactance Iron losses ANSWER DOWNLOAD EXAMIANS APP
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