Tunnel Engineering

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
4.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
Answer: Option A.

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

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