Question

Disadvantage of using pneumatic caissons are ________

(a) Process cannot be done under control conditions

(b) Sinking process is tedious

(c) Inspection process is time consuming

(d) All of the mentioned

This question was posed to me in an international level competition.

My doubt stems from Well Foundations in section Well Foundations of Geotechnical Engineering II

Answer 1

Right choice is (b) Sinking process is tedious

The explanation: In pneumatic caissons, the sinking of pneumatic caissons are tedious, time consuming and expensive.