tunnel engineering Mcqs
1. What is the correct sequence of the following events in rock tunnelling?
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A. es ?

B. setting up and drilling

C. removing foul gas

D. ect the correct answer using the codes given below

E. checking misfire

F. loading explosives and blasting

2. Drift method of tunnelling is used to construct tunnels in__________________?
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A. soft grounds

B. self supporting grounds

C. broken grounds

D. rock
3. Circular section of tunnels is not suitable for________________?
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A. tunnels driven by shield method

B. non-cohesive soils

C. placement of concrete lining

D. carrying water

4. Which of the following are percussion drills ?
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A. ) churn drill </strong>

B. i) wagon drill

C. ect correct answer?

D. ) diamond drill

E. shot drill
5. 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/
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A. Both A and R are true and R is the correct explanation of A.

B. Both A and R are 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.

6. Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
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A. It is suitable for construction in unstable rocks

B. In case of excessive water, it is easy to take correct steps

C. In this method, it is easy to install timber support

D. Tunnelling can be continuous and the work can be expedited
7. Which of the following is not a component of the shield ?
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A. hood

B. liner plate

C. propelling jacks

D. tail

8. Which of the following methods of tunneling is used for long tunnels at great depths ?
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A. Needle beam method

B. Austrian method

C. English method

D. Army method

9. A good blast with a good yield is obtained if the cut hole is___________________?
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A. inclined at 45 to the face

B. inclined at 30 to the face

C. inclined at 15 to the face

D. normal to face

10. Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?
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A. 4 m

B. 2 m

C. 5 m

D. 3 m
11. In the construction of Metro Railways, Cut and Cover method of construction is suitable in situations listed at________________?
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A. sider the following situations

12. Which one of the following is a component of a shield for tunnelling ?
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A. stiffener

B. trench jack

C. cutting edge

D. liner plate

13. If D is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_________________?
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A. 104 D

B. 124 D

C. 82 D

D. 42 D

14. If N is the number of shafts used, then the total number of feces available for attacking the excavation and construction in tunnels are_________________________?
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A. N + 2

B. 2N

C. 2 N + 1

D. 2 N + 2
15. The needle beam method of tunneling______________?
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A. ect the answer?

B. ) is suitable for brick lining

C. ) requires large number of trench jacks</strong>

D. i) is suitable for concrete lining

E. is suitable for soils in which roof can stand for few minutes without support
16. The most suitable soil for compressed air tunneling is________________?
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A. silt

B. gravel

C. clay

D. sand

17. In Belgium method of tunneling _________________?
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A. construction of invert and side walls is completed before roof arch is built

B. construction of side walls is completed before invert and roof arch are built

C. construction of invert is completed before side walls and roof arch are built

D. construction of roof arch is completed before side walls and invert are built
18. As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?
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A. increases by 3.5 times

B. remains same

C. decreases

D. increases by 2.25 times
19. The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?
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A. shot drill, churn drill, wagon drill

B. wagon drill, shot drill, churn drill

C. wagon drill, churn drill, shot drill

D. churn drill, wagon drill, shot drill

20. In full face method of constructing tunnels, the first operation relates to______________?
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A. excavation of one drift in the centre

B. excavation being done along the periphery

C. removal of bottom portion

D. removal of top portion

21. American method of tunneling________________?
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A. ect the correct answer?

B. ) requires heavy timbers </strong>

C. is no, suitable for railway or highway tunnels

D. is suitable for large sized tunnels
22. 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________________?
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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

23. Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
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A. timber

B. cement concrete

C. cast iron

D. stone masonry

24. Which one of the following tunnelling methods is used for laying under ground sewers ?
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A. Needle beam method

B. Army method

C. German method

D. Italian method

25. Drifters can be used to drill_________________?
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A. only up holes

B. horizontal or up holes

C. horizoral, down or up holes

D. only down holes

26. What is the correct sequence of the following events of construction of a shaft in rock ?
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A. drilling and blasting

B. mucking</strong>

C. timbering

D. pumping

27. In compressed air tunneling, the volume of free air provided is______________?
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A. 20 m3 per minute per m2 of face area

B. 6 m3 per minute per m2 of face area

C. 6 mJ per second per m2 of face area

D. 6 m3 per hour per m2 of face area