Tunnel Engineering
For transferring the tunnel alignment through shafts, we adopt the following steps:1.Hanging two or more plumb lines in the shaft2.Determining the bearing of the plumb lines i.e. plumb plane3.Suspending a 35 kg weight by each plumb line4.Immersing the weights of both the plumb lines in the buckets containing waterThe correct sequence of steps is:
- A. 1, 2, 3, 4
- B. 4, 3, 2, 1
- C. 1, 3, 2, 4
- D. 2, 1, 4, 3