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MCQs

Total Questions : 203 | Page 8 of 21 pages
Question 71.


Which one of the following methods is adopted for permanent drainage of tunnels :



  1.    provision of longitudinal drains
  2.    continuous open drains
  3.    concrete lining
  4.    grouting with cement or chemicals
  5.    All the above.
 Discuss Question
Answer: Option E. -> All the above.


Question 72.


For hauling muck from the tunnel, the following type of muck-car is used :



  1.    muck box
  2.    balle-ship
  3.    side dump car
  4.    U-bottom
  5.    All of these.
 Discuss Question
Answer: Option E. -> All of these.


Question 73.


High pressure grouting is generally restored for concreting in the lining if the rock strata is:



  1.    highly fissured
  2.    poor
  3.    likely to get seepage of water
  4.    All of the above.
 Discuss Question
Answer: Option D. -> All of the above.


Question 74.

The length of the needle beam used in needle beam method of tunnelling is usually



  1.    2 m to 4 m
  2.    2.5 m to 6 m
  3.    4 m to 7 m
  4.    5 m to 6 m
 Discuss Question
Answer: Option D. -> 5 m to 6 m


Question 75.


Pick up the correct statement from the following:



  1.    The topographical maps of the Survey of India are useful in the mountainous region for tunnelling.
  2.    The height point on the ridge is fixed with the help of reciprocal ranging
  3.    The accuracy of 1 in 10, 000 is required for planimetric control
  4.    1 second theodolite is used for angular measurement to achieve an angular error of 15 N where N is number of angles
  5.    All the above.
 Discuss Question
Answer: Option E. -> All the above.


Question 76. For highways, tunnelling is preferred to if the open cut exceeds :
  1.    10 metres depth
  2.    15 metres depth
  3.    20 metres depth
  4.    25 metres depth.
 Discuss Question
Answer: Option B. -> 15 metres depth
Answer: (b).15 metres depth
Question 77. Which one of the following statements is not correct in respect of setting of an inclined tunnel:
  1.    Reference points are constructed at every 300 m.
  2.    The alignment is fixed from upper/lower apex point.
  3.    The level of the invert at the heading is marked by a tape.
  4.    None the above.
 Discuss Question
Answer: Option D. -> None the above.
Answer: (d).None the above.
Question 78. The advantages of providing a pair of tunnels as compared to only one large highway tunnel is :
  1.    economy in cost of construction
  2.    avoidance of head on collisions
  3.    provision of separate exit and entrance of two traffic streams
  4.    All the above.
 Discuss Question
Answer: Option D. -> All the above.
Answer: (d).All the above.
Question 79. Forepoling method is generally adopted for tunnelling in :
  1.    soft ground
  2.    firm ground
  3.    running ground
  4.    None of these.
 Discuss Question
Answer: Option A. -> soft ground
Answer: (a).soft ground
Question 80. The following operations are required for tunnelling in rocky terrain :
1. Removing the foul gases
2. Marking the tunnel profile
3. Setting up and drilling
4. Checking misfire
5. Mucking
The correct sequence is :
  1.    1 2 3 4 5
  2.    2 3 5 4 1
  3.    4 2 1 3 5
  4.    2 3 1 4 5
 Discuss Question
Answer: Option D. -> 2 3 1 4 5
Answer: (d).2 3 1 4 5

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