Tunnel Engineering

The following operations are required for tunnelling in rocky terrain:
1.Removing the foul gases
2.Marking the tunnel profile
3.Setting up and drilling
4.Checking misfire
5.Mucking
The correct sequence is:

  • A. 1, 2, 3, 4, 5
  • B. 2, 3, 5, 4, 1
  • C. 4, 2, 1, 3, 5
  • D. 2, 3, 1, 4, 5
Answer: Option D.
Explanation: 

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

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