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Lactometer is used to measure ________.
  • a)
    Specific Gravity of milk
  • b)
    Speed of wind
  • c)
    Pressure
  • d)
    Steps
Correct answer is option 'A'. Can you explain this answer?
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Lactometer is used to measure Specific Gravity of milk

The correct answer is option 'A': Specific Gravity of milk.

A lactometer is a device that is used to measure the specific gravity of milk. It is an important tool in the dairy industry as it helps in determining the quality and composition of milk. The specific gravity of milk is a measure of its density compared to the density of water.

What is Specific Gravity?

Specific gravity is the ratio of the density of a substance to the density of a reference substance. In the case of milk, the reference substance is water. The specific gravity of milk is a measure of how much denser or lighter it is compared to water.

How does a Lactometer work?

A lactometer consists of a glass tube with a bulb at one end and a scale on the other end. The bulb is filled with mercury or lead shots to provide stability. The lactometer is carefully floated in a sample of milk, and the depth to which it sinks in the milk is measured.

The specific gravity of milk can be calculated using the following formula:

Specific Gravity = Depth of lactometer in milk / Depth of lactometer in water

The depth of the lactometer in water is usually marked on the scale, and the depth in milk is read from the scale after floating the lactometer in the milk sample.

Significance of measuring Specific Gravity of milk

The specific gravity of milk is an important parameter that indicates the quality and composition of milk. It provides information about the amount of fat, protein, and solids present in the milk. By measuring the specific gravity, the adulteration of milk can be detected. For example, if water or other substances are added to milk, the specific gravity will be lower than that of pure milk.

The specific gravity of milk also affects its processing and manufacturing. Different types of dairy products require milk with specific ranges of specific gravity. For example, for making cheese, a higher specific gravity is desirable.

In conclusion, a lactometer is a device used to measure the specific gravity of milk. It helps in determining the quality, composition, and potential adulteration of milk. The specific gravity of milk is an important parameter in the dairy industry and plays a significant role in the processing and manufacturing of dairy products.
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