The height of the free fall in sample in standard penetration test is _______

The inside clearance of the sampler should ___

The general exploration gives information about which of the following features?

The undistributed samples are obtained by __

In open drive samples, the tube is split into two parts.

The cone test is very useful in ______

In Dutch cone test, the angle of vector of cone is ____

To impart cohesion, __ is used.