Gerber test is used to determine -
- A.Protein percent in milk
- B.Fat percent in milk
- C.Acidity of milk
- D.SNF % in milk
Correct answer
Explanation
The correct answer is B, the fat percentage in milk. In the Gerber test a measured quantity of milk is mixed with sulphuric acid and amyl alcohol in a butyrometer and spun in a centrifuge; the acid digests everything but the fat, which rises into the graduated neck of the tube and is read off directly as a percentage. It is the test on which milk is paid for at a collection centre, which is why it matters so much in a buffalo keeping state like Haryana, where the fat content of Murrah milk is its selling point.
Option A, protein, is measured by the Kjeldahl method or by instruments, not by the Gerber test. Option C, acidity, is found by titration against an alkali and is used to judge whether milk has begun to sour. Option D, solids not fat, is worked out from the fat reading and the lactometer reading together rather than measured directly. Knowing which test gives which figure is the whole of this question.
Read the full article: Haryana Livestock and Dairy: Murrah Buffalo and Breeds
Practice Questions
View allIf 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
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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.
Read the full explanation →The most popular fine wool sheep breed of the world is -
- A.Merino
- B.Lincoln
- C.Corriedale
- D.Rambouillet
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The Merino, of Spanish origin and now reared in large numbers in Australia, is the standard fine wool sheep of the world, its fleece being soft, dense and of very small fibre diameter.
Read the full explanation →Among the following bovine animals of India, the best breed is
- A.Tharparkar
- B.Amrit Mahal
- C.Hariana
- D.Kankrej
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The correct answer, as marked in the paper, is D, Kankrej. The Kankrej of the Kutch and Banaskantha country is rated the best of the Indian dual purpose cattle breeds: it is the largest and heaviest of them, its bullocks have the fastest and most enduring gait of any Indian…
Read the full explanation →Which buffalo breed is called the black gold of Haryana?
- A.Nili Ravi
- B.Murrah
- C.Mehsana
- D.Surti
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The Murrah is the buffalo of Rohtak, Jind, Hisar and Bhiwani, jet black and heavy bodied with short, tightly curled horns, and it yields more milk and richer milk than any other buffalo breed of India.
Read the full explanation →Which is the indigenous cattle breed of Haryana?
- A.Sahiwal
- B.Gir
- C.Hariana
- D.Red Sindhi
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The breed takes its name from the region and is the classic dual purpose cattle of the state: white or light grey, with a long narrow face, a small hump and strong legs, giving a useful quantity of milk and bullocks once prized for ploughing and carting.
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