1. What is electrical power system? [NOV/DEC 2012,MAY/JUNE 2009]
2. What are the constituent sections of the power systems?
3. What are the components of a power system? [MAY/JUNE 2014]
4. Mention the transmission voltages that are used in India?
5. What is the highest AC transmission voltage w...
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, EE6402 - TRANSMISSION AND DISTRIBUTION UNIT I – STRUCTURE OF POWER SYSTEM
PART - A 32. Why is voltage regulation better in case of DC transmission?
33. Why DC transmission is economical and preferable over AC transmission
1. What is electrical power system? [NOV/DEC 2012,MAY/JUNE 2009] for large distances only?
2. What are the constituent sections of the power systems? 34. Why DC system is not used for transmission?
3. What are the components of a power system? [MAY/JUNE 2014] 35. List the various systems of power transmission in D.C. and A.C System.
4. Mention the transmission voltages that are used in India? 36. What is the difference between 3 phases, 3 wires and 3 phases, 4 wire
5. What is the highest AC transmission voltage we have in India? systems? [NOV/DEC 2010,2013] [MAY/JUNE 2014, 2009]
6. What is the economical value of span for 400kv transmission line? 37. Explain the 3-wire DC system.
7. On what basis the conductor size is determined for transmission lines upto 38. Distinguish between over head system and underground system.
220 KV? 39. What are the merits of underground system?
8. Write the voltage range of HV, EHV and UHV system. 40. What are the demerits of underground system?
9. Define one line diagram. 41. What are the merits of over head lines?
10. State the advantages of single line diagram?
m
42. What are the de merits of overhead lines?
11. What is need of load dispatch centers? What are the LDCs available in
o
43. What is concentrated load?
c
.
tamilnadu? 44. What is distributed load?
a
12. What are the differences between transmission and distribution? 45. How distribution systems are classified?
13. What is meant by transmission system? 46. What is ring main distributor? [NOV/DEC 2012]
14. What is meant by distribution system?
m 47. What are the advantages of ring main distributor?[MAY/JUNE 2009]
15. Why all transmission and distribution systems are 3 phase systems?
a 48. What is a distribution substation?
yn
16. What is primary transmission? 49. Give the types of loading in distribution system.
17. What is secondary transmission? 50. Classify the distribution system based on the scheme of connection.
d
18. What is primary distribution system? 51. How will you select an ideal location for a distribution substation?
tu
19. What is secondary distribution system? [MAY/JUNE 2006]
20. What are the main parts of distribution systems? 52. Why the transmission systems are mostly overhead systems?
S
21. What is a feeder? [NOV/DEC 2011,2012] 53. Why overhead line conductors are invariably stranded?
22. What is a service main? [NOV/DEC 2010,2011] 54. What is grid or interconnected system? [MAY/JUNE 2009]
23. What is a distributor? 55. What are the advantages of interconnected system?
24. Classify transmission systems. 56. State the advantages of ring main distribution system over radial system.
25. What is breakeven distance? [NOV/DEC 2009] [MAY/JUNE 2007]
26. Which system is adopted for transmission of electric power? 57. What are the drawbacks of radial system?
27. What are the elements of transmission system? 58. Mention the problems associated with an EHV transmission?
28. Write advantages of A.C transmission. 59. On what basis, the conductor size of EHV line is determined?
29. Write disadvantages of A.C transmission. 60. State the advantages of EHVAC transmission system. [APRIL/MAY
30. What are the advantages of DC system? 2008]
31. What are the disadvantages of DC system? 61. Mention the sources of audible noise generation in EHV transmission
V Semester EEE/ Page 1
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