In the process of pile foundation, boring is done with the help of _____

The types of hammer used for driving piles are _______

The maximum spacing of the under-reamed pile should not normally exceed ______

Cased cast-in-situ piles are suitable for _____ conditions.

In dynamic formulae what are the energy losses, that is not accounted?

In pressure pile, the frictional resistance is increased by ______

The test which can be used for separating load carried by the pile is _____

Pile groups in under-reamed pile foundation can be tested by means of _____