Tunnelling - Engineering

Q1:

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.

ANS:D - all the above.

No answer description is available.