Question

The allowable pressure that is allowed inside the working chamber of pneumatic caissons is _______

(a) 2 kg/cm^2

(b) 4 kg/cm^2

(c) 3.5 kg/cm^2

(d) 7 kg/cm^2

This question was posed to me in an interview for job.

This question is from Well Foundations in division Well Foundations of Geotechnical Engineering II

Answer 1

Right answer is (c) 3.5 kg/cm^2

For explanation I would say: Normally the tolerable air pressure under which a man can work is limited to 3.5 kg/cm^2 in pneumatic caissons.