If CLR of milk is 28, then the specific gravity of milk will be -
- A.1.28
- B.0.28
- C.1.028
- D.1.025
Correct answer
Explanation
The correct answer is C, 1.028. The corrected lactometer reading, written CLR, is the figure read on the neck of a lactometer floating in milk, and the specific gravity is obtained from it by the simple relation one plus the reading divided by one thousand. A reading of 28 therefore means a specific gravity of 1.028, which lies in the normal range for buffalo and cow milk and tells the tester that the milk has not been watered.
Option A, 1.28, is far too high for any milk and would mean a liquid denser than a strong salt solution. Option B, 0.28, is lighter than water and is impossible for milk, which always sinks a lactometer less than water does because it carries dissolved solids. Option D, 1.025, would correspond to a reading of 25, not 28, and is included to catch a candidate who remembers the formula but not the arithmetic. Along with the fat test, the lactometer reading is the second standard check at a milk collection centre.
Read the full article: Haryana Livestock and Dairy: Murrah Buffalo and Breeds
Practice Questions
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