In rotator boring ______ is forced down the hallow drillrods.

The depth up to which the increase in pressure due to structural loading is likely to cause perceptible settlement is __…

The cone resistance is approximately equal to __ times the penetration resistance N.

Electrical resistivity method is based on measurement of _________

The methods of site investigation are dependent upon ____

The penetration resistance is driving the sampler ______

For pile foundations, the depth of exploration at the start of the work is _____

Rotary boring can also be called as _______