1867Civil EngineeringMedium
In compressed air tunneling, the volume of free air provided is________?
A6 m3 per minute per m2 of face area
B20 m3 per minute per m2 of face area
C6 mJ per second per m2 of face area
D6 m3 per hour per m2 of face area
Correct answer
A. 6 m3 per minute per m2 of face area
Explanation
The correct answer is 6 m3 per minute per m2 of face area.