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Question

Consider the following properties for a soil sampler:
1. Area ratio should be low.
2. Cutting edge should be thick.
3. Inside clearance should be high.
4. Outside clearance should be low.
The properties necessary for a good quality soil sampler would include

A
1 and 4
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B
1, 2 and 4
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C
2, 3 and 4
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D
1,3 and 4
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Solution

The correct option is A 1 and 4
Area ratio is the most critical factor which affects sample disturbance. It indicates the ratio of displaced volume of soil to that of the soil sample collected. If Ar is less than 10%, the sample disturbance is supposed to be small. Inside clearance should be 1 to 3%. Outside clearance should not be much greater than inside clearance and its value should lie between 0 to 2%.

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