Tunnel Engineering

If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnels are_____.

  • A. 2N
  • B. N + 2
  • C. 2N + 1
  • D. 2N + 2
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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