The method used for studying of horizontal changes in the sub-soil is ___

For transport of sample to laboratory, the sample is ____

________ sample has the natural structure of soil as modified.

Refusal of standard penetration test occurs when the sampler penetrates ____

The number and disposition of bore holes are varied, depending upon ___

Hand auger can be used for depths up to ____

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

The inside clearance of the sampler is ____