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
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
ln a transformer routine efficiency depends upon? Mark as favorite Copy Link supply frequency load current power factor of load both (b) and (c) Check Answer
Which winding in a transformer has more number of turns? Mark as favorite Copy Link Low voltage winding High voltage winding Primary winding Secondary winding Check Answer
Which of the following is not a part of transformer installation? Mark as favorite Copy Link Conservator Breather Buchholz relay Exciter Check Answer
Buchholz relay is used on? Mark as favorite Copy Link welding transformers air-cooled transformers furnace transformers oil cooled transformers Check Answer
Buchholz relay is used in? Mark as favorite Copy Link motor protection line protection transformer protection none of the above Check Answer
When a delta connected primary of a 3-phase transformer is connected to 3- phase supply? Mark as favorite Copy Link magnetizing current in phase winding will carry third harmonics but line current will be free from it magnetizing current in phase winding will contain third harmonics and line current will also contain third harmonics magnetizing current in phase winding will not contain third harmonics but line current will contain third harmonics none of the above Check Answer
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