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
For. given effective applied voltage of constant frequency eddy current losses? Mark as favorite Copy Link become less with peaked wave shape of applied voltage independent of the wave shape of the applied voltage either of the above none of the above Check Answer
Transformer supplying load having negative resistance characteristics such as arc load, is considered if its voltage regulation is? Mark as favorite Copy Link low high either of the above none of the above Check Answer
Leakage fluxes of a transformer may be minimized by? Mark as favorite Copy Link avoiding overloads keeping magnetizing current to the minimum reducing the reluctance of the iron core to the minimum sectionalizing and interleaving the primary and secondary windings Check Answer
The yoke sections of transformers using hot-rolled laminations is made 15 per cent greater than that of the core so as to? Mark as favorite Copy Link to increase the size of the transformers to reduce the copper loss to reduce the iron loss in yoke and magnetizing current to provide better cooling Check Answer
ln Scott connections the main transformer has centre tap on? Mark as favorite Copy Link primary winding secondary windings both primary and secondary windings none of the above Check Answer
For transformers upto a capacity of …… kVA air blast cooling is provided? Mark as favorite Copy Link 2500 5000 10000 20000 Check Answer
The transformer laminations are insulated from each other by? Mark as favorite Copy Link mica strip thin coat of varnish paper any of the above Check Answer
The voltage transformation ratio of a transformer is equal to the ratio of? Mark as favorite Copy Link primary turns to secondary turns secondary current to primary current secondary induced e.m.f. to primary induced e.m.f. secondary terminal voltage to primary applied voltage Check Answer
Natural air cooling is generally restricted for transformers up to? Mark as favorite Copy Link 1.5 MVA 5 MVA 15 MVA 50 MVA Check Answer