Multiple inlet system of air cooling of turbo-alternators can be used for machines of rating upto_______________?

Related Mcqs:

The mcrease in heat dissipation by air blasts is due to increase in______________?

A. conduction B. convection E. radiation D. any ofthe above...

In self cooled motors the cooling time constant is about ___________ than the heating time constant because cooling conditions are worse at standstill?

A. 2 to 3 times greater B. 3 to 4 times greater C. 4 to 5 times greater D. none of the above...

Which of the following methods may be adopted to reduce the effects of armature reaction ?

A. Increase in length of air gap at pole tips B. Increasing reluctance of pole tips C. Compensating windings D. Interpoles E. All of the above...

The stator of a D.C. machine comprises of_____________?

A. main poles B. interpoles C. frame D. all of the above...

For 275 kV transformers, using cold rolled grain oriented steel, which of the following values of flux density may be used?

A. 1.0 Wb/m2 B. 1.1 Wb/m2 C. 1.3 Wb/m2 D. 1.6 Wb/m2 E. None of the above...