N atural air coo ling is generally restricted for transformers up to__________?

Related Mcqs:

The efficiency of a transformer will be maximum when_____________?

A. copper losses = hysteresis losses B. hysteresis losses = eddy current losses C. eddy current losses = copper losses D. copper losses = iron losses...

Spacers are provided between adjacent coils?

A. to provide free passage to the cooling oil B. to insulate the coils from each other C. both A. and (b) D. none of the above...

Power transformers are generally designed to have maximum efficiency around__________?

A. no-load B. half-load C. near full-load D. 10% overload...

Which of the following loss in a transformer is zero even at full load ____________?

A. Core loss B. Friction loss C. Eddy current loss D. Hysteresis loss...

Which of the following parts of a transformer is visible from outside ?

A. Bushings B. Core C. Primary winding D. Secondary winding...