Question

A sharp vertical edge for the well is provided at _________

(a) Inner Face of the well

(b) Out of the well

(c) Outside face of the caisson

(d) All of the mentioned

This question was posed to me in an online quiz.

Question is from Well Curb, Cutting Edge, Steining and Bottom Plug topic in chapter Well Foundations of Geotechnical Engineering II

Answer 1

Right option is (c) Outside face of the caisson

For explanation I would say: A sharp vertical edge or cutting edge should be provided along the outside face of the caisson or open well.