Electric Traction | Fifth Semester | Electrical and Electronics Engineering

 1. Electric Traction | List four constituents of supply system.

2. List four factors which decides cross section of overhead contact wire. 

3. What are track circuits? State any two functions of it.

4. State two functions of auxiliary circuit of Ac locomotive.

5. Explain the means to improve reliability of locomotive.

6. Explain why LEM is called as wheel less drive.

7. List four important features of moving primary & fixed secondary single sided  LEM.

8. List four miscellaneous equipment at control post with function of each. Draw

the labeled diagram of traction substation.

9. State the function of following: (i) Feeding post (ii) Sectioning & Paralleling Post (iii) Sub-sectioning Post (iv) Elementary Section

10. List out special features of traction transformer as compared to conventional transformer.

11. Explain the function or need of traction substation.

12. What is OHE? State its function & draw the simplest form of OHE showing various parameters on it.

13. Compare uninsulated overlap & insulated overlap in four point.

14. State the function of neutral section and section insulator. 

15. Compare conductor rail system and overhead system used for supplying power in electric traction in four point.

16. Draw the labeled diagram of pole collector and bow collector. 

17. List three advantages with one application of Pantograph collector.

18. List four functions of Railway signaling.

19. Draw the block diagram of remote control system used in supervisory control. 

20. State the function of colour light signals.

21. State the suitability of colour light signals & also state its three types.

22. List any two requirements of train lighting.

23. List four causes of failures of under frame generating equipment.

24. Draw the labeled diagram of power circuit of AC locomotive. 

25. State the function of following equipment in power circuit of AC locomotive:

(A) Tap changer              (B) Traction Transformer 

(C) Circuit breaker          (D) Smoothing reactor 

26. State the function of contactors in electric locomotive & also list its any two types.

27.  List any four equipment used in auxiliary circuits of AC locomotive. 

28. Classify types of locomotives on basis of

(A) Types of service (B) Types of Track gauge (C) Type of supply 

29. State function of relay used in electric locomotive & also state its two types.

30. Explain with neat sketch protection of locos against lightning surges. 

31. Explain Ideal Maintenance of electric locomotive.

32. List four strengths & four weaknesses of LEM propelled Railway traction system.