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PART (^
Answer any two full questions, each carries 20 marks.
What is meant by undisturbed and disturbed samples? Mention the sampler

which can be used to obtain undisturbed and disturbed samples?

An open drive sampler with an outside diameter 76 mm and inside diameter 72
mm was used to obtain soil sample. Calculate the area ratio and also mention
the quality of sample obtained?

Explain the different features of a sampling device which controls the sample
disturbance and ways to reduce them.

During a sampling operation, a thin walled sampler was pushed into soft clay to
a distance of 600 mm. The recovered length of the sample was found to be 589
mm. What is the recovery ratio? Also mention the sample quality.

Briefly explain the method of collecting sand samples from beneath the water
table.

Define Rock quality designation and core recovery. How are core samples
handled and transported to laboratory?

Explain the procedure for separating skin friction and point resistance from a
cyclic pile load test data.

A pile load test is conducted on a 30 cm diameter pile. The results are given in

the table below:

Load in Settlement in

tonnes mm

Plot the graph and determine the allowable load.

(Chart papers to be provided for this question)

ಸಸ್ಯ KK

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