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Civil Engineering - Tunnelling

Exercise : Tunnelling - Section 1
  • Tunnelling - Section 1
16.
Pick up the mechanical ventilation method used for tunnels from the following:
blowing fresh air by ducts to the face of tunnel
exhausting foul air by ducts from the face of the tunnel and permitting fresh air through the tunnel
blowing fresh air and exhausting foul air by ducts
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Which one of the following methods of tunnelling does not require the use of time bearing :
Linear plate method
Shield method
Compressed air method
Mechanical tunneler i.e. mole method
All the these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
For highways, tunnelling is preferred to if the open cut exceeds :
10 metres depth
15 metres depth
20 metres depth
25 metres depth.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
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 2 3 4 5
2 3 5 4 1
4 2 1 3 5
2 3 1 4 5
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
The advantages of providing a pair of tunnels as compared to only one large highway tunnel is :
economy in cost of construction
avoidance of head on collisions
provision of separate exit and entrance of two traffic streams
facility in carrying out repairs
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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