Tunnel Engineering Quiz | Tunnel Engineering Multiple Choice Questions and Answers
Questions
1
In compressed air tunneling, the volume of free air provided is
Answer: 6 m3 per minute per m2 of face area
2
Which of the following is not a component of the shield ?
Answer: liner plate
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3
The correct sequence of drilling equipment for increasing size of holes in tunnels is
Answer: wagon drill, churn drill, shot drill
4
If ‘N’ is the number of shafts used, then the total number of feces available for attacking the excavation and construction in tunnels are
Answer: 2 N + 2
6
Which of the following are percussion drills ?
(i) shot drill
(ii) diamond drill
(iii) wagon drill
(iv) churn drill Of these statements
Answer: (iii) and (iv) are coiTect
7
As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield
Answer: increases by 2.25 times
8
A good blast with a good yield is obtained if the cut hole is
Answer: inclined at 45° to the face
9
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 :Answer: 1,4,2,3
10
Circular section of tunnels is not suitable for
Answer: placement of concrete lining
11
In Belgium method of tunnelling
Answer: construction of roof arch is completed before side walls and invert are built.
12
Which of the following methods of tunneling is used for long tunnels at great depths ?
Answer: Austrian method
13
The needle beam method of tunneling
(i) is suitable for soils in which roof can stand for few minutes without support
(ii) is suitable for brick lining
(iii) is suitable for concrete lining
(iv) requires large number of trench jacks Of these statements
Answer: (i), (ii) and (iv) are correct
15
Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than
Answer: 3 m
16
Which one of the following tunnelling methods is used for laying under ground sewers ?
Answer: Army method
17
If ‘D’ is the diameter of tunnel in metres, then the thickness of lining in mm, as per the empirical formula is given by
Answer: 82 D
18
Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
Answer: cast iron
19
American method of tunneling
i) is suitable for large sized tunnels
Answer: only (i) is correct
20
Assertion A : English method of tunneling requires more time as compared to other methods of tunneling.
Reason R : In English method of tunneling, the masons and excavators have to work alternately.
Select your answer based on the coding system given below :Answer: Both A and R are true and R is the correct explanation of A.
