The operation of a D.C. machine with large air gap lengths is comparatively_____________?

Related Mcqs:

The heat dissipated by from a surface depends upon its temperature and its characteristics like colour, roughness etc?

A. conduction B. convection C. radiation D. any of the above...

Machines cooled by direct cooling method may be called_____________?

A. “supercharged” B. “inner cooled” C. “conductor cooled” D. any of the above...

____________are always double layer type?

A. Closed windings B. Open windings C. Either of the above D. None of the above...

In D.C. machines the usual limit of slot pitch is________________?

A. between 5 to 10 mm B. between 10 to 15 mm C. between 15 to 20 mm D. between 25 to 35 mm...

Transformers with a capacity of up to __________ have a cooling radiator system with natural cooling?

A. 2 MVA B. 5 MVA C. 7.5 MVA D. 10 MVA...