Q. The natural process of emulsification of oil in water can be accelerated through the use of chemical dispersants.

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Q. What is the first step in primary sewage treatment plants?

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Q. What is called for the removal of sand, gravel in the primary treatment of sewage treatment plant?

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Q. What is called for the place where lighter, organic material settles in the primary treatment of sewage plant?

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Q. Where can we find rotating arm sprays in sewage treatment?

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Q. In which secondary treatment of sewage treatment sludge is broken down in an anaerobic digester?

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Q. In sewage treatment of oxidation pond we can see the water up to 2 meters deep.

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Q. In which of the following treatment of sewage plant we can find disinfection as a step?

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Q. How many percentage of BOD removes in primary treatment?

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Q. What is the main objective of secondary treatment of sewage plants?

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Q. How many common approaches are used in secondary treatment?

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Q. What is the meaning of ‘Tainting’ related to marine pollution?

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Q. When drill cutting dumped on the seabed which toxic is produced?

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Q. What happens if liquid oil contaminates a bird’s plumage?

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Q. What is noise?

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Q. In which unit sound is measured?

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Q. Which pollution cause hearing loss in organisms?

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Q. What is the dB of a threshold of hearing?

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Q. What is the dB of a threshold of pain?

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Q. All sound is noise.

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