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

Related Mcqs:

1. 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...

2. Which of the following methods does not take into account the maximum temperature rise under variable load conditions ?

   A. Equivalent power method B. Equivalent current method C. Method of average losses D. Equivalent torque method...

3. 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...

4. The weight of copper of both armature and field windings decreases with __________ in number of poles?

   A. increase B. decrease C. either of the above D. none of the above...

5. The cylindrical windings using circular conductors are used for current rating of____________?

   A. upto 20 A B. upto 40 A C. upto 60 A D. upto 80 A...

6. A practical formula for determining the thickness of insulation between low voltage and high voltage windings is__________________?

   A. 1 + 0.2 kVmm B. 2 + 0.5 kVmm C. 4 + 0.7 kV mm D. 5 + 0.9 kV mm...

7. D.C. windings are____________?

   A. sometimes 2-layer type B. never 2-layer type C. always 2-layer type D. none of the above...

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. Helical windings are used in________________?

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

10. Cylindrical windings using circular conductors, employed in transformers, are_____________?

    A. single layered B. double layered C. multi-layered D. none of the above...