Civil Engineering Practice Questions on Tunnel Engineering - Set 05 - ObjectiveBooks

# Practice Test: Question Set - 05

1. The advantages of providing a pair of tunnels as compared to only one large highway tunnel is:
(A) Economy in cost of construction
(B) Avoidance of head on collisions
(C) Provision of separate exit and entrance of two traffic streams
(D) All the above

2. The following tunnels were constructed in different countries for different purposes:
1. Emperor Claudius built the first Roman tunnel
2. The first highway tunnel was constructed in Hungary
3. The first underground railway tunnel was constructed in Great Britain
4. The first navigational tunnel was constructed in France.
The correct chronological development of these tunnels is:
(A) 4, 1, 3, 2
(B) 1, 4, 2, 3
(C) 2, 3, 1, 4
(D) 3, 2, 4, 1

3. For tunnels exceeding 300 m in length, the grade should be provided below
(A) 50% of the ruling gradient
(B) 60% of the ruling gradient
(C) 75% of the ruling gradient
(D) 80% of the ruling gradient

4. The difference of heights of the tunnels above rail tops of BG and MG tracks is kept
(A) 0.30 m
(B) 0.45 m
(C) 0.60 m
(D) 0.75 m

5. The most suitable soil for compressed air tunnelling is
(A) Silt
(B) Sand
(C) Clay
(D) Gravel

6. 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:
(A) 1, 2, 3, 4, 5
(B) 2, 3, 5, 4, 1
(C) 4, 2, 1, 3, 5
(D) 2, 3, 1, 4, 5

7. Assertion A: English method of tunnelling requires more time as compared to other methods of tunnelling.
Reason R: In English method of tunnelling, the masons and excavators have to work alternately
(A) Both A and R is true and R is the correct explanation of A
(B) Both A and R is true and R is not the correct explanation of A
(C) A is true but R is false
(D) A is false but R is true

8. In the wooded bulk-head, used for mucking in steep grade tunnels,
(A) One opening is provided
(B) Two openings are provided
(C) Three openings are provided
(D) No opening is provided

9. The length of the needle beam used in needle beam method of tunnelling is usually
(A) 2 m to 4 m
(B) 2.5 m to 6 m
(C) 4 m to 7 m
(D) 5 m to 6 m

10. What is the correct sequence of the following events of construction of a shaft in rock?
1. Drilling and blasting
2. Timbering
3. Pumping
4. Mucking

Select the correct answer using the codes given below Codes:
(A) 1, 2, 3, 4
(B) 1, 4, 2, 3
(C) 2, 1, 4, 3
(D) 2, 4, 1, 3

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