Question

(d) 23
Q16. Consider the following statements:
To obtain an undisturbed soil sample from a bore hole in soft soils, the conditions to be satisfied
are
1. a rotary sampler is to be used
2. a piston sample should be used
3. the inside clearance should be less than 3%
4. heavy wall sampler with brass liner
Which of the above statements are correct?
(a) 1 and 3
(b) 2 and 3
(c) 1 and 2
(d) 2,3 and 4​

Answer 1

Answer:

(b) 2 and 3

Explanation:

The mixture of organic matter, minerals, gases, liquids, and living things that makes up soil—also referred to as earth or dirt—supports life. Some scientific definitions differentiate between soil and dirt by limiting the former term to only displaced soil.

In addition to a porous phase that holds water and gases (the soil atmosphere), soil consists of a solid phase made up of minerals and organic matter (the soil matrix) (the soil solution). The three states of soil are thus solids, liquids, and gases. It continuously changes as a result of a variety of physical, chemical, and biological processes, including weathering and the related erosion. Soil is viewed as an ecosystem by soil ecologists because of its complexity and strong internal connections.

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