Harmonics in transformer result in? Mark as favorite Copy Link increased core losses increased I2R losses magnetic interference with communication circuits all of the above Check Answer
ln the transformer following winding has got more cross-sectional area? Mark as favorite Copy Link Low voltage winding High voltage winding Primary winding Secondary winding Check Answer
The magnetising current of a transformer is usually small because it has? Mark as favorite Copy Link small air gap large leakage flux laminated silicon steel core fewer rotating parts Check Answer
If a transformer is switched on to a voltage more than the rated voltage? Mark as favorite Copy Link its power factor will deteriorate its power factor will increase its power factor will remain unaffected its power factor will be zero Check Answer
Buchholz’s relay gives warning and protection against? Mark as favorite Copy Link electrical fault inside the transformer itself electrical fault outside the transformer in outgoing feeder for both outside and inside faults none of the above Check Answer
A Buchholz relay can be installed on? Mark as favorite Copy Link auto-transformers air-cooled transformers welding transformers oil cooled transformers Check Answer
Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds? Mark as favorite Copy Link 50ºC 80ºC 100ºC 150ºC Check Answer
Spacers are provided between adjacent coils? Mark as favorite Copy Link to provide free passage to the cooling oil to insulate the coils from each other both (a) and (b) none of the above Check Answer
A Buchholz relay can be installed on? Mark as favorite Copy Link auto-transformers air-cooled transformers welding transformers oil cooled transformers Check Answer
Natural oil cooling is used for transformers upto a rating of? Mark as favorite Copy Link 3000 kVA 1000 kVA 500 kVA 250 kVA Check Answer