Pycnometer is used to determine -a)Water content and voids ratiob)Specific gravity and dry densityc)Water content and specific gravityd)None of theseCorrect answer is option 'C'. Can you explain this answer?

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Answer

Explanation:

Pycnometer is a laboratory glassware used for measuring the specific gravity of liquids and solids. It is commonly used in soil mechanics and construction engineering for determining the specific gravity of soil, sand, and aggregates. The specific gravity is the ratio of the density of the material to the density of water.

Uses of Pycnometer:

Pycnometer is used to determine the specific gravity of liquids and solids. It is also used for the following purposes:

Measuring the water content of soil and other materials.

Calculating the voids ratio of soil and other materials.

Determining the dry density of soil and other materials.

Procedure for using Pycnometer:

The following steps are followed when using a pycnometer:

The pycnometer is first cleaned and dried before use.

The pycnometer is then filled with distilled water and weighed.

The water is then emptied and the pycnometer is dried again.

The material whose specific gravity is to be determined is then placed in the pycnometer and the pycnometer is filled with distilled water.

The pycnometer is then weighed with the material and water inside.

The specific gravity of the material can then be calculated using the following formula:
Specific gravity = (Weight of material in air - Weight of pycnometer with material and water) / (Weight of pycnometer with water - Weight of pycnometer)

Conclusion:

Pycnometer is a useful laboratory glassware used for determining the specific gravity of liquids and solids. It is commonly used in soil mechanics and construction engineering for determining the specific gravity of soil, sand, and aggregates. It is also used for measuring the water content, voids ratio, and dry density of soil and other materials.

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