Tunnel Engineering

For tunnels exceeding 300 m in length, the grade should be provided below_____.

  • A. 50% of the ruling gradient
  • B. 60% of the ruling gradient
  • C. 75% of the ruling gradient
  • D. 80% of the ruling gradient
Answer: Option C.
Explanation: 

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

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