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

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The design of mechanical parts is particularly important in case of __________ speed machines?

A. low B. medium C. high D. any of the above...

With direct water cooling it is possible to have ratings of about_____________?

A. 200 MW B. 300 MW C. 400 MW D. 600 MW...

The winding where dummy coils are used is sometimes called______________?

A. duplex winding B. triplex winding C. forced winding D. none of the above...

The insulation between windings and grounded core and the insulation between the windings of the same phase is called__________________?

A. minor insulation B. major insulation C. either of the above D. none of the above...

Helical windings are used in________________?

A. distribution transformers B. power transformers C. shell type transformers D. none of the above...