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Tunnel Engineering Quiz | Tunnel Engineering Objective Type Questions and Answers

Questions
21

Assertion A : When rock conditions are favorable, it will not be necessary to take up concrete lining concurrently with the driving operations till the full length of the tunnel has been driven through rock.

Reason R : A tunnel through rock, hard or soft, does not need any concrete lining.

Select your answer based on the coding system given below:
A Both A and R are true and R is the correct explanation of A.
B Both A and R are true but R is not the correct explanation of A.
C A is true but R is false.
D A is false but R is true.

Answer: A is true but R is false.
22 Which one of the following is a component of a shield for tunnelling ?
A liner plate
B trench jack
C stiffener
D cutting edge

Answer: cutting edge
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23 In “full face” method of constructing tunnels, the first operation relates to
A removal of bottom portion
B excavation of one drift in the centre
C removal of top portion
D excavation being done along the periphery

Answer: excavation being done along the periphery
24 Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
A It is suitable for construction in unstable rocks.
B In this method, it is easy to install timber support.
C Tunnelling can be continuous and the work can be expedited.
D In case of excessive water, it is easy to take correct steps.

Answer: Tunnelling can be continuous and the work can be expedited.
25 Consider the following situations.

1. Soil is soft.

2. Volume of existing surface traffic on the alignment is heavy.

3. Track is at a deeper level.

4. Water table is high.

In the construction of Metro Railways, “Cut and Cover” method of construction is suitable in situations listed at
A 1 and 2
B 1 and 3
C 1 and 4
D 2 and 3

Answer: 1 and 4
26 Drift method of tunnelling is used to construct tunnels in
A soft grounds
B rock
C self supporting grounds
D broken grounds

Answer: rock
27 What is the correct sequence of the following events in rock tunnelling?

1. marking tunnel profile

2. loading explosives and blasting

3. checking misfire

4. mucking

5. removing foul gas

6. setting up and drilling

7. guniting

Select the correct answer using the codes given below. Codes:
A 1,6,5,3,4,2,7
B 1,2,6,3,5,4,7
C 1, 6,2, 5,4, 3, 7
D 1,6,2,5,3,4,7

Answer: 1,6,2,5,3,4,7

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