Transformers The efficiency of a transformer, under heavy loads, is comparatively low because voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input iron loss is increased considerably copper loss becomes high in proportion to the output voltage drop both in primary and secondary becomes large secondary output is much less as compared to primary input iron loss is increased considerably copper loss becomes high in proportion to the output ANSWER DOWNLOAD EXAMIANS APP
Transformers In case of 3-phase induction motors, plugging means starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping locking of rotor due to harmonics pulling the motor directly on line without a starter starting the motor on load which is more than the rated load interchanging two supply phases for quick stopping locking of rotor due to harmonics pulling the motor directly on line without a starter ANSWER DOWNLOAD EXAMIANS APP
Transformers In a transformer the energy is conveyed from primary to secondary None of these by the flux through air through cooling coil None of these by the flux through air through cooling coil ANSWER DOWNLOAD EXAMIANS APP
Transformers An isolation transformer has primary to secondady turns ratio of 1:2 1:1 Can be any ratio 2:1 1:2 1:1 Can be any ratio 2:1 ANSWER DOWNLOAD EXAMIANS APP
Transformers A transformer oil must be free from Sludge Gases Moisture Odour Sludge Gases Moisture Odour ANSWER DOWNLOAD EXAMIANS APP
Transformers The dielectric strength of transformer oil is expected to be 33 kV lkV 330 kV 100 kV 33 kV lkV 330 kV 100 kV ANSWER DOWNLOAD EXAMIANS APP
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