Following are some of the multiple choice questions on the Power Systems with answers that will help the students in developing their knowledge.
Power Systems MCQ
1. How much wind power does India hold?
2. The overall efficiency of thermal power plant is equal to
3. Solar thermal power generation can be achieved by
4. At what range of speed is the electricity from the wind turbine is generated?
5. What should be the value of earthing resistance for large power stations?
6. The amount of energy available in the wind at any instant is proportional to ___ of the wind speed.
7. When did the development of wind power in India began?
8. If the load current decreases then the power factor
9. Power factor of a load can be improved by using
10. Which of the following is not the distribution system normally used
11. Which type of system is generally adopted for the generation and transmission of electrical power?
12. The steady state stability of the power system can be improved by
13. The stability of the power system is not affected by which among these?
14. Various power system faults in increasing order of severity are
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LG,LL,LLG,LLLG
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LLLG,LLG,LG,LL
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LLG,LLLG,LL,LG
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LL,LG,LLLG,LLG
15. What percentage of fault occurring in the power system is line to line fault
16. A _________ distribution system is more reliable than the ______ distribution system.
17. What is the expression for fault current in line to line fault?
18. Winds having following speed are suitable to operate wind turbines.
19. The rated voltage of a 3 phase power system is given by
20. What are the terminal conditions in case of SLG fault, if the fault occurs in the phase A?
21. The generating voltage and frequency in India is about?
22. The short circuit current of an alternator when short circuited on three phases will be
23. The advantage of neutral earthing is
24. When a line-to-line fault occurs, the short circuit current of an alternator depends upon its
25. Base impedance of the power system is given as:
26. Which one of the following statements is NOT true?
27. If power factor is less than unity then it will result in
28. Which of the following type of reactors are popularly used in power systems?
29. While designing the distribution to locality of one lac population with medium dense load requirement, we can employ ___________
30. In which part of the power system has lowest voltage?
31. What are the common assumptions made for the equal area criterion?
32. In India largest thermal power station is located at
33. . One would design the feeders of the transmission system based on its ____________
34. What is the main source for the formation of wind?
35. The amount of photo generated current increases slightly with increase in _________
36. The load flow solution is always assured in case of:
37. In a star connected system without neutral grounding, zero sequence currents are
38. When alternating current passes through a conductor
39. Skin effect is proportional to
40. A’ is an operator used to symmetrical component analysis
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Which rotates the vector, it operates upon, through an angle 90° in the clockwise direction
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Which rotates the vector, it operates upon, through an angle 120°, in the counter-clockwise direction
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Which rotates the vector, it operates upon, through an angle 120°, in the clockwise direction
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Which rotates the vector, it operates upon, through an angle 240°, in the clockwise direction
41. Wind energy is harnessed as ______ energy with the help of windmill or turbine.
42. By using which component can the transient stability limit of a power system be improved?
43. For the given distribution system the maximum voltage at the midpoint will be ________
44. In overhead transmission lines the effect of capacitance can be neglected when the length of line is less than
45. Use of high speed circuit breaker will actually increase the system stability.
46. Which one of the following device is used for improving the power factor of the system:
47. When a line to ground fault occurs,the current in faulted phase is 100 A.The zero sequence current in this case will be
48. For the single phase 2-wire system, the maximum voltage between the outer wires and earth is ______________
49. Which among the following quantities are specified at the generator bus?
50. Which one of the following loads has the poorest power factor?
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