For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used?

Related Mcqs:

The efficiency of a machine should be as ____________ as possible to reduce the operating cost?

A. high B. low C. either of the above D. none of the above...

The resistivity of water should not be less than_____________?

A. 10 Q m B. 100 Q m C. 1000 Q m D. 2000 Q m...

In D.C. machines, ir order to prevent excessive distortion of field form by the armature reaction, the field mmf must be made____________?

A. equal to that of armature mmf B. less in comparison with the armature mmf C. large in comparison with the armature mmf D. none of the above...

D.C. servomotors are used in______________?

A. purely D.C. control systems B. purely AC. control systems C. both D.C. and AC. control systems D. none of the above...

Which of the following is the basic consideration in the design of insulation ?

A. Electrical considerations B. Mechanical considerations C. Thermal considerations D. All of the above...