Following are some of the multiple choice questions on the D.C. Generators with answers that will help the students in developing their knowledge.
D.C. Generators MCQ
1. What is Superman's birth name?
2. Cables, generally used beyond 66 kV are
3. The metallic sheath may be made of lead or lead alloy or of aluminium.
4. The electrostatic stress in underground cables is
5. The breakdown of insulation of the cable can be avoided economically by the use of
6. The insulation of the cable decreases with
7. A cable carrying alternating current has
8. In a cable the voltage stress is maximum at
9. Capacitance grading of cable implies
10. Underground cables are laid at sufficient depth
11. The thickness of metallic shielding on cables is usually
12. Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ?
13. If a power cable and a communication cable are to run parallel the minimum distancebetween the two, to avoid interference, should be
14. Copper as conductor for cables is used as
15. The insulating material should have
16. The advantage of oil filled cables is
17. In capacitance grading a homogeneous dielectric is used.
18. In congested areas where excavation is expensive and inconvenient 'draw in system'of laying of underground cables is often adopted.
19. Natural rubber is obtained from milky sap of tropical trees.
20. Rubber is most commonly used insulation in cables.
21. Cables for 220 kV lines are invariably
22. High tension cables are generally used upto
23. The current carrying capacity of cables in D.C. is more thanthat in A.C. mainly due to
24. In case of three core flexible cable the colour of the neutral is
25. Cables are used for 132 kV lines.
26. Conduit pipes are normally used to protect _____ cables.
27. The minimum dielectric stress in a cable is at
28. In single core cables armouring is not done to
29. Dielectric strength of rubber is around
30. Low tension cables are generally used upto
31. In a cable, the maximum stress under operating conditions is at
32. The surge resistance of cable is
33. In the cables, the location of fault is usually found out by comparing
34. Pressure cables are generally not used beyond
35. The intersheaths in the cables are used to
36. In the cables, sheaths are used to
37. If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then thedielectric strength of insulation should be
38. A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become
39. In cables the charging current
40. Solid type cables are considered unreliable beyond 66 kV because
41. The relative permittivity of rubber is
42. The material for armouring on cable is usually
43. In capacitance grading of cables we use a ______ dielectric.
44. If the length of a cable is doubled, its capacitance
45. In a cable immediately above metallic sheath _____ is provided.
46. Which generator would you prefer for feeding long D.C. transmission lines ?
47. The essential condition for parallel operation of two D.C. generators is that they have
48. When two D.C. generators are running in parallel an equilizer bar is used
49. With a D.C. generator which of the following regulation is preferred ?
50. The number of armature parallel paths in a two-pole D.C. generator having duplex lapwinding is
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