Tunnel Engineering

If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_____.

  • A. 42 D
  • B. 82 D
  • C. 104 D
  • D. 124 D
Answer: Option B.

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

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