Civil Engineering - Tunnelling

Exercise :: Tunnelling - Section 1

  • Tunnelling - Section 1
31. 

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.

Answer: Option B

Explanation:

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32. 

Railway tunnels, are generally

A. polycentric
B. rectangular
C. parabolic
D. circular
E. none of these.

Answer: Option A

Explanation:

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33. 

Pick up the explosive used for tunnelling in soft rocks from the following :

A. blasting gelatine
B. special gelatine
C. ammonia dynamite
D. semi-gelatine.

Answer: Option C

Explanation:

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34. 

The cut of a tunnel face is shown in given figure. This is called

A. Michigan cut
B. Burn cut
C. Fan cut
D. Horizontal cut.

Answer: Option A

Explanation:

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35. 

For B.G. single track, the section of the tunnel must have a width

A. 4.2 m to 4.5 m
B. 4.5 m to 4.8 m
C. 4.9 m to 5.5 m
D. 5.5 m to 5.8 m

Answer: Option C

Explanation:

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