Tractive magnets are operated from____________?

Related Mcqs:

1. electromagnets generally function as holding magnets ?

   A. Tractive B. Portative C. Either of the above D. None of the above...

2. If an insulating material is operated beyond the maximum allowable temperature, its life is_____________?

   A. drastically increased B. drastically reduced C. unaffected D. none of the above...

3. The action of electromagnetic machines can be related to which of the following basic principles __________?

   A. Induction B. Interaction C. Alignment D. All of the above...

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

   A. 10 MW B. 30 MW C. 60 MW D. 150 MW...

5. Which of the following is an advantage of hydrogen cooling ?

   A. Increase in efficiency B. Increase in ratings C. Increase in life D. Smaller size of coolers E. All of the above...

6. By which of the following methods motor rating for variable load drives can be determined ?

   A. Method of average losses B. Equivalent current method C. Equivalent torque method D. Equivalent power method E. All of the above...

7. ____________are always double layer type?

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

8. In D.C. machines the width of the duct is usually_____________?

   A. 4 mm B. 6 mm C. 8 mm D. 10 mm...

9. Which of the following in an application of D.C. motors?

   A. Traction B. Drives for process industry C. Battery driven vehicles D. Automatic control E. All of the above...

10. Disc windings are primarily used in_____________-?

    A. short capacity transformers B. medium capacity transformers C. high capacity transformers D. any of the above...