#MCQ_POWER_SYSTEM #GATE_MCQ_POWER_SYSTEM #IES_MCQ_POWER_SYSTEM #RRB_MCQ_POWER_SYSTEM #PSU_MCQ_POWER_SYSTEM Power system part 1_25 Most Important MCQ OF Power System _Objective Type Question OF Power system with Explanation_ questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams VIVA Questions, Electrical Engineering 25 Most Important MCQ, Power System, Objective Type Question answer, Power system with Explanation, interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams, electrical engineering, VIVA Questions, Electrical Engineering ,electric power may be transmitted, Overhead system, Underground system, Distributors, Service mains,

1. SSC(JE)/RRB/PSCProf.Prasant Tiwari
POWER SYSTEM
MCQ (PART-II)

2. POWER SYSTEM
26. Which of the following faults is most likely
to occur in cables ?
(a) Cross or short-circuit fault
(b) Open circuit fault
(c) Breakdown of cable insulation
(d) All of the above
Ans: d

3. POWER SYSTEM
27. The cause of damage to the lead sheath of
a cable is
(a) crystallisation of the lead through vibration
(b) chemical action on the lead when buried in
the earth
(c) mechanical damage
(d) all of the above
Ans: d

4. POWER SYSTEM
28. The voltage of the single phase supply to
residential consumers is
(a) 110 V
(b) 210 V
(c) 230 V
(d) 400 V
Ans: c

5. POWER SYSTEM
29. Most of the high voltage transmission
lines in India are
(a) underground
(b) overhead
(c) either of the above
(d) none of the above
Ans: b

6. POWER SYSTEM
30. The distributors for residential
areas are
(a) single phase
(b) three-phase three wire
(c) three-phase four wire
(d) none of the above
Ans: c

7. POWER SYSTEM
31. The conductors of the overhead
lines are
(a) solid
(b) stranded
(c) both solid and stranded
(d) none of the above
Ans: b

8. POWER SYSTEM
32. High voltage transmission lines use
(a) suspension insulators
(b) pin insulators
(c) both (a) and (b)
(d) none of the above
Ans: a

9. POWER SYSTEM
33. Multicore cables generally use
(a) square conductors
(b) circular conductors
(c) rectangular conductors
(d) sector-shaped conductors
(e) none of the above
Ans: d

10. POWER SYSTEM
34. Distribution lines in India generally use
(a) wooden poles
(b) R.C.C. poles
(c) steel towers
(d) none of the above
Ans: b

11. POWER SYSTEM
35. The material commonly used
for insulation in high voltage
cables is
(a)Lead
(b) paper
(c) rubber
(d) none of the above
Ans: b

12. POWER SYSTEM
36. The loads on distributors systems are
generally
(a) balanced
(b) unbalanced
(c) either of the above
(d) none of the above
Ans: b

13. POWER SYSTEM
37. The power factor of industrial
loads is generally
(a) unity
(b) lagging
(c) leading
(d) zero
Ans: b

14. POWER SYSTEM
38. Overhead lines generally use
(a) copper conductors
(b) all aluminium conductors
(c) A.C.S.R. conductors
(d) none of these
Ans: c

15. POWER SYSTEM
39. In transmission lines the cross-arms are
made of
(a) copper
(b) wood
(c) R.C.C.
(d) Steel
Ans: d

16. POWER SYSTEM
40. The material generally used for armour of
high voltage cables is
(a) aluminium
(b) steel
(c) brass
(d) copper
Ans: b

17. POWER SYSTEM
41. Transmission line insulators are
made of
(a) glass
(b) porcelain
(c) iron
(d) P.V.C.
Ans: b

18. POWER SYSTEM
42. The material commonly used for
sheaths of underground cables is
(a) lead
(b) rubber
(c) copper
(d) iron
Ans: a

19. POWER SYSTEM
43. The minimum clearance between the
ground and a 220 kV line is about
(a) 4.3 m
(b) 5.5 m
(c) 7.0 m
(d) 10.5 m
Ans: c

20. POWER SYSTEM
44. The spacing between phase conductors
of a 220 kV line is approximately equal to
(a) 2 m
(b) 3.5 m
(c) 6 m
(d) 8.5 m
Ans: c

21. POWER SYSTEM
45. Large industrial consumers are supplied
electrical energy at
(a) 400 V
(b) 11 kV
(c) 66 kV
(d) 400 kV
Ans: c

22. POWER SYSTEM
46. Which of the following protects a cable
against mechanical injury ?
(a) Bedding
(b) Sheath
(c) Armouring
(d) None of the above
Ans: c

23. POWER SYSTEM
47. Which of the following insulation is used
in cables ?
(a) Varnished cambric
(b) Rubber
(c) Paper
(d) Any of the above
Ans: d

24. POWER SYSTEM
48. Empire tape is
(a) varnished cambric
(b) vulcanised rubber
(c) impregnated paper
(d) none of the above
Ans: a

25. POWER SYSTEM
49. The thickness of the layer of insulation on
the conductor, in cables, depends upon
(a) reactive power
(b) power factor
(c) voltage
(d) current carrying capacity
Ans: c

26. POWER SYSTEM
50. In case of three core flexible cable the
color of the neutral is
(a) blue
(b) black
(c) brown
(d) none of the above
Ans: a