Pick up the correct statement from the following during tunnel excavation

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Question:
Pick up the correct statement from the following during tunnel excavation

1.Oxygen should not be less than 19.5%

2.Carbon monoxide should not be more than 0.01%

3.Carbondioxide should not be more than 0.5%

4.All of the above

Posted Date:-2022-09-25 07:28:14

More MCQS Questions and answers

  1. A good blast with a good yield is obtained if the cut hole is
  2. A tunnel is found more advantageous as compared to the alternate routes because it
  3. An overhead track on a large truss frame is required in case of car changer by
  4. Circular section of tunnels is not suitable for
  5. Concrete lining is provided concurrently with the driving operation in case of
  6. Diverting water entering tunnel is
  7. Drift method of tunneling is used to construct tunnels in
  8. Drift method of tunnelling is used to construct tunnel in
  9. Drifters can be used to drill
  10. First tunnel built in the world was in Babylon, in the year
  11. For B.G. single track railway, the height of the tunnel above top of rails should be
  12. For B.G. single track, the section of the tunnel must have a width
  13. For full face method, the excavation to be done generally divided into
  14. For highways, tunnelling is preferred to if the open cut exceeds
  15. For mucking the method employed is
  16. For tunnels exceeding 300 m in length, the grade should be provided below
  17. Forepoling method is generally adopted for tunneling in
  18. If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnels are
  19. In Belgium method of tunneling
  20. In case of drift method of tunnelling, the drift may be excavated at
  21. In case of tunnels in hilly areas to align tunnel ends use
  22. In compressed air tunneling, the volume of free air provided is
  23. In the wooden bulk head, used for mucking in steep grade tunnels.
  24. In tunnel, unless special provision is made for proper drainage, the gradient should not be more than
  25. Mechanical ventilation method used in tunnels consists of
  26. Pack grouting with concrete is required between
  27. Pick up the correct statement from the following during tunnel excavation
  28. Pick up the correct statement from the following during tunnel excavation
  29. Railway tunnels, are generally
  30. Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than
  31. The correct sequence of drilling equipment for increasing size of holes in tunnels is
  32. The drilling pattern in which 3 to 4 converging holes are so directed that they meet at point further is known as
  33. The explosive recommended for blasting a soft rock
  34. The explosive used in tunnelling is
  35. The length of the first tunnel built in the world of Babylon in the year 2000 BC was
  36. The length of the needle beam used in needle beam method of tunneling is usually
  37. The method employing steel lined plates and air compressors for driving them is known as
  38. The method in which roof arch is completed before excavating a trench for laying muck track is known as
  39. The method of draining in the tunnels, is generally known as
  40. The method of lining in tunnel is
  41. The most commonly adopted pattern of cut holes is
  42. The most commonly adopted pattern of cut holes is
  43. The most suitable soil for compressed air tunneling is
  44. The tunnels, the artificial underground passages are constructed for
  45. To obtain the required shape of the tunnel section, we use
  46. Which of the following is not a component of the shield?
  47. Which of the following lining material is useful for shield driven tunnels in sub aqueous regions?
  48. Which one of the following is a component of a shield for tunneling?
  49. Which one of the following is a method of tunneling in firm soft strata?
  50. Which one of the following is a method tunnelling in running ground?
  51. Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
  52. Which one of the following is not a drilling pattern adopted in tunnelling?
  53. Which one of the following is not a method of supporting roof and sides in multiple drift method of tunnelling?
  54. Which one of the following is not a permanent drainage work
  55. Which one of the following linings is suitable for shield driven tunnels particularly in the subaqueous regions
  56. Which one of the following methods is adopted permanent drainage of tunnels
  57. Which one of the following methods is generally adopted for tunneling in firm ground
  58. Which one of the following methods of tunneling does not require the use of time bearing.
  59. Which one of the following methods of tunneling is used for long tunnels at great depths?
  60. Which one of the following statements is not correct for heading and benching method of tunnelling?
  61. Which one of the following statements is not correct with regard to heading and hunching method of tunnelling.
  62. Which one of the following tunneling methods is used for laying underground sewers?
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