Q. How many types of solids are present in water?

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Q. What is the movement of solids in water called?

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Q. The clustered particles formed in the presence of a flocculant are called ______

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Q. What is the chemical formula of aluminium sulphate?

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Q. 1 micrometer = _______

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Q. What is the test used to select the type of coagulant required?

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Q. What is the ratio of Alum/Phosphate while adding alum to a waste water in order to remove the phosphates present?

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Q. At what pH is the solubility of AlPO₄ minimum?

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Q. At what pH is the solubility of FePO₄ minimum?

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Q. Addition of which of these result in lowering the BOD level?

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Q. What is the ideal mixing time required for polymers?

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Q. What is the detention time assumed while designing a flocculator?

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Q. Calculate the volume of flocculator for the following data:

Flow rate: 2200m³/hr

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Q. What is the ratio of Polymer/Phosphate while adding polymer to a waste water in order to remove the phosphates present?

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Q. Calculate the volume of flocculator for the following data:

Flow rate: 500m³/hr

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Q. Determine the size of a flash mixer for the following data. Round off to the nearest digit.

Flow rate: 2200 m³/hr

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