Face Mechanisation-2

1. The compressed air jack hammer will not operate properly on long or shorter strokes than that for which it is designed the important requirement is?

2. Permissible length of trailing cable is?

3. The conductivity of the armouring of permanent cable serving the purpose of earthing shall have at least ... that power core?

4. The limiting gradient for the shearer is?

5. The output per day with the SDL is?

6. The maximum gradient for wheel mounted machine is?

7. The maximum gradient for crawler mounted machine with spikes is?

8. Alpine miner is mounted on?

9. Gate end box used to supply electricity of?

10. Total capacity of motor in AM-50 roadheader is?

11. The most common type of flame proof protection is?

12. The maximum speed of the LHD when empty is?

13. The permanent cable suspended in vertical shaft should be?

14. Intrinsically safe circuit or apparatus works on voltage not more than?

15. The maximum gradient for crawler mounted machine without spikes is?

16. While the face is advanced the cable supplies the power from gate end box to coal drill is extended through joint box of?

17. In permanent cable used to supply the electric power run through the shaft or incline the moisture of atmosphere is excluded by?

18. The shape of the drill rod used in stone is?

19. The electric cable used for water places is?

20. Where Electric battery loco is used in underground the battery charging station shall be close to?

21. The limiting gradient for the LHD is?

22. The maximum height of the seam for the SDL is?

23. The supply voltage for electric LHD is?

24. The motor capacity of the shearer nowadays is?

25. The maximum working gradient for coal cutting machine is?

26. The supply of compressed air alternatively from top and bottom of piston in jackhammer is caused by the part?

27. In gate end box the leakage protection should work where is a leakage of?

28. The maximum thickness of the seam that the shearer can work nowadays is?

29. The maximum gradient for tyre mounted machine is?

30. The maximum gradient for skid mounted machine with special arrangement is?

31. The maximum output of the LHD with 3.5 cu.m per month is?

32. The machine suitable to be used in trimming the faces or in ripping the roof to save drilling and blasting time and cost is?

33. The maximum gradient for skid mounted machine is?

34. The limiting gradient for the SDL is?

35. The maximum speed of the LHD when loaded is?

36. Roll rack chainless haulage is used?