The standard penetration test is performed in clear hole of _________ mm in diameter.

In the open drive samples, the tube head is provided with vents.

The feature that helps to estimate the relative density of coarse-grained soil is ___

For undistributed samples __ is used.

The information that should be yielded on site exploration is________

The sampler in standard penetration test has outer diameter of _____ mm.

The undistributed samples are obtained by __

The depth of exploration for isolated spread footing is _______