Q. What is the role of chlorine in water treatment?

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Q. Which heavy metal is found in cooling water treatment?

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Q. How is hardness represented?

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Q. What is the level of Calcium carbonate for a moderately hard water?

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Q. How is TDS and conductivity related?

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Q. Colour is contributed to which of the following?

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Q. What will be the Total Organic Carbon (TOC) of coloured water?

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Q. _______ are found in agricultural wastes.

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Q. _________ is determined by measuring the dissolved oxygen used by microorganisms during the biochemical oxidation of organic matter in 5 days at 20˚C.

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Q. How are many forms of nitrogen present in wastewater?

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Q. After how many days will nitrogen will be oxidized to nitrite and nitrate?

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Q. ______ is determined by measuring the dissolved oxygen used during the chemical oxidation of organic matter in 3 hours.

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Q. Which of the following is used for a small concentration of organic matter?

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Q. Which of the following indicates that the water body has been used for waste disposal?

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Q. What is the maximum concentration of total solids present in wastewater?

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Q. What is the TSS effluent concentration for 7 days?

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Q. The BOD test is carried out for how many days?

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Q. At what temperature the bottles for the BOD test are incubated?

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Q. What is the mathematical expression of BOD?

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Q. In terms of percentage how much BOD is oxidised in 5 days?

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