# Tunnel Engineering Mcqs

Q.  In compressed air tunneling, the volume of free air provided is______________?

a. 6 mJ per second per m2 of face area
b. 6 m3 per minute per m2 of face area
c. 20 m3 per minute per m2 of face area
d. 6 m3 per hour per m2 of face area

ANSWER: See Answer

No explanation is available for this question!
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