Natural oil cooling is used for transformers up to a rating of____________?

Related Mcqs:

In a transformer the energy is conveyed from primary to secondary_________?

A. through cooling coil B. through air C. by the flux D. none of the above...

Primary winding of a transformer________________?

A. is always a low voltage winding B. is always a high voltage winding C. could either be a low voltage or high voltage winding D. none of the above...

A Buchholz relay can be installed on______________?

A Buchholz relay can be installed on A. auto-transformers B. air-cooled transformers C. welding transformers D. oil cooled transformers...

During short circuit test iron losses are negligible because of _____________?

A. the current on secondary side is negligible B. the voltage on secondary side does not vary C. the voltage applied on primary side is low D. full-load current is not supplied to the transformer...

For the parallel operation of single phase transformers it is necessary that they should have___________?

A. same efficiency B. same polarity C. same kVA rating D. same number of turns on the secondary side....