The dynamic formula is valueless for which of the following type of soil?

The depth of the bore hole is checked at _____ before insertion of the under-reamer.

For pile in cohesive soil ______ is neglected for individual pile action.

A Factor of safety that should be adopted for finding an allowable load for a pile is _____

Under-reamed pile foundation is most suitable for _______ type of condition.

The base of an vibro-pile should be in the shape of _______

The efficiency of pile group depends upon ______

In pressure pile, the frictional resistance is increased by ______