Which of the following apparatus is used to determine the specific gravity of the soil?
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A.
Penetrometer
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B.
Tachometer
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C.
Pycnometer
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D.
Graphometer
Correct Answer:
C. Pycnometer
Explanation:
A pycnometer is the standard laboratory instrument used to calculate the specific gravity of soil particles. This method involves measuring the density of the soil relative to the density of water at a documented temperature. While tools like the penetrometer assess soil strength and the tachometer measures rotational speed, the pycnometer ensures accurate results by accounting for the volume of solids within a soil sample.
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