Q. Thiobacillus can produce an acidity in the range of pH __________

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Q. In which of the following organism does iron secreted to form stalks or ribbons attached to the cell?

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Q. Which of the following sewerage systems carry domestic and industrial waste water?

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Q. The more oxidizable organic material, the lesser the BOD.

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Q. Which of the following is a strict anaerobe?

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Q. In which of the following treatment involve oxidation of organic constituents of the wastewater?

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Q. The upper region of the trickling filter is favorable for the growth of _____________

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Q. Activated sludge usually employs an aeration period of ________________

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Q. Oxidation ponds are very deep ponds.

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Q. Trickling filter is used in which of the following wastewater treatment processes?

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Q. Belt filter presses are used in which of the following process?

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Q. Which of the following gases are produced in large amounts during sludge digestion?

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Q. Which of the following organism occurs on the skin of fresh poultry?

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Q. What is the pH of bananas?

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Q. Raw milk of good sanitary quality will develop sweet flavour.

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Q. At what temperature pasteurization of milk takes place?

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Q. Which among the following is a gas producer organism?

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Q. Which among the following group of microorganisms are found in the ducts of cow’s mammary glands?

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Q. The coloration of the milk is caused by which of the following organism?

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Q. In which of the following biochemical types of microorganisms a slime layer or capsule is formed on the cells?

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