# Civil Engineering - Tunnelling

### Exercise :: Tunnelling - Section 1

• Tunnelling - Section 1
26.

Which one of the following methods is generally used for the layout of the muck-car tracks

 A. the grass hopper method B. passing track method C. the cherry picker D. California crossing, Dixon conveyor E. All the above.

Explanation:

No answer description available for this question. Let us discuss.

27.

For transferring the tunnel alignment through shafts, we adopt the following steps :
1. Hanging two or more plumb lines in the shaft
2. Determining the bearing of the plumb lines i.e. plumb plane
3. Suspending a 35 kg weight by each plumb line
4. Immersing the weights of both the plumb lines in the buckets containing water.
The correct sequence of steps is :

 A. 1 2 3 4 B. 4 3 2 1 C. l 3 2 4 D. 2 1 4 3

Explanation:

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28.

For initial surveys of tunnels, the following activities are involved:
1. Marking portal point with concrete pillars on the ground
2. Marking tunnel obligatory points on the topographical maps
3. Preliminary setting of the tunnel on the topographical Survey of India maps
3. Driving lines between the fixed obligatory points.
The correct sequence of the activities is :

 A. 3 2 4 1 B. 1 2 3 4 C. 4 3 1 2 D. 2 4 3 1

Explanation:

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29.

For full face method, the excavation to be done is generally divided into

 A. two sections B. three sections C. four sections D. five sections.

Explanation:

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30.

The tunnels, the artificial underground passages are constructed for :

 A. highways B. railways C. sewerage D. water supply project E. All the above.