Tunnel Engineering

Pick up the mechanical ventilation method used for tunnels from the following:

  • A. Blowing fresh air by ducts to the face of tunnel
  • B. Exhausting foul air by ducts from the face of the tunnel and permitting fresh air through the tunnel
  • C. Blowing fresh air and exhausting foul air by ducts
  • D. All the above
Answer: Option D.

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

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