Tunnelling

Q1: 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

ANS:A - 1 2 3 4 

No answer description is available. 



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