At a given depth, the skin friction of the well is equal to ______

The radius of the well curb should be kept _____ larger than the outside radius of well steining.

Which of the following caissons, permits excavation in dry?

The method of construction of pneumatic caisson is similar to ____

A sharp vertical edge for the well is provided at _____

What are the horizontal forces that are prone to act on a well foundation?

The common types of well shape are _____

What are the types of caissons that can be used as a foundation?