The length cf air gap to be provided in __________ is primarily determined by power factor consideration?

Related Mcqs:

1. In induction motors, the length of air gap in kept as small as mechanically possible is order to have____________?

   A. low power factor B. high power factor C. high over load capacity D. any of the above...

2. D.C. machines designed with a large value of air gap length have_____________?

   A. worst, ventilation B. poor ventilation C. better ventilation D. none of the above...

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

   A. quiet B. noisy C. either of the above D. none of the above...

4. Which of the following is the major consideration to evolve a good design ?

   A. Cost B. Durability C. Compliance with performance criteria as laid down in specifications D. All of the above...

5. 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...

6. Which of the following is the major consideration to evolve a good design?

   A. Cost B. Durability C. Compliance with performance criteria as laid down in specifications D. All of the above Submitted by: Abid...

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

   A. 1.0 to 1.2 A/mm2 B. 1.5 to 2.0 A/mm2 C. 2.2 to 3.2 A/mm2 D. 3.2 to 4.2 A/mm2...

8. Disc windings are primarily used in_____________-?

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

9. 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...

10. By which of the following methods the temperature rise of windings and other parts may be determined ?

    A. Thermometer method B. Resistance method C. Embedded temperature detector method D. Any of the above...