Q. The presence of which of the following indicates old pollution?

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Q. ________ is used to find the D.O content of sewage.

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Q. The permissible dose of chloride in domestic sewage is __________

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Q. Imhoff cone is used to measure the _______

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Q. The decomposition of sewage takes place, causing a pungent smell. Which of the following causes the pungent smell?

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Q. Which of the following disease is caused due to lack of nitrates?

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Q. The maximum quantity of dissolved oxygen present in wastewater is called __________

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Q. Identify the odd one of the following.

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Q. The fresh sewage is acidic in nature.

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Q. Which of the following is an end product formed from both the aerobic and anaerobic decomposition of organic matter?

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Q. The aerobic decomposition of carbonaceous organic matter gives __________

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Q. BOD of wastewater having aerobic oxidation is more than that, having anaerobic oxidation.

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Q. The aerobic decomposition of nitrogenous organic matter gives __________

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Q. Methane is formed due to the reduction of __________

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Q. Which of the following is formed due to the anaerobic decomposition of carbonaceous organic matter?

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Q. Which of the following is formed due to the reduction of sulfurous organic matter?

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Q. Partially oxidized sewage contains __________

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Q. The aerobic decomposition of sulfurous organic matter gives __________

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Q. The energy released during the aerobic oxidation of organic matter is _____ kilo calories.

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Q. The decomposition of nitrogenous organic matter in the absence of oxygen gives __________

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