A. Silver
B. Steel
C. Aluminium
D. Copper
Advertisement
Related Mcqs:
- 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...
- In D.C. machines, the ________ in field mmf results in increase in size and cost of machines?
- A. increase B. decrease C. either of the above D. none of the above...
- Electrical machines having power outputs ranging from a few kW up to approximately 250 kW may be classified as_____________?
- A. small size machines B. medium size machines C. large size machines D. any of the above...
- Electrical machines having a power output up to about 750 W may be called__________machines?
- A. small size B. medium size C. large size D. any of the above...
- 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...
- 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...
- 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...
- Disc windings are primarily used in_____________-?
- A. short capacity transformers B. medium capacity transformers C. high capacity transformers D. any of the above...
- Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________?
- A. upto 20 kV B. upto 50 kV C. upto 80 kV D. for 110 kV and above...
- Cylindrical windings using circular conductors, employed in transformers, are_____________?
- A. single layered B. double layered C. multi-layered D. none of the above...
Advertisement
