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 :
Options
A. 1 2 3 4
B. 4 3 2 1
C. l 3 2 4
D. 2 1 4 3
Correct Answer
1 2 3 4
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