Q. How many hours does the removing of Settleable particles require in fill and draw type of sedimentation tanks?

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Q. In which of the following sedimentation tanks, the flow may be either horizontal or vertical?

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Q. What is the maximum permissible velocity in horizontal flow type sedimentation tank?

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Q. The vertical type of sedimentation tanks are usually in _________ shape.

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Q. Why are the baffle walls provided?

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Q. Sludge is disposed through _______

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Q. ________ is provided after activated sludge process.

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Q. In a primary sedimentation tank in percentage what is the amount of TSS removed?

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Q. In a primary sedimentation tank in percentage what is the amount of BOD removed?

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Q. What is the detention time considered while designing a primary sedimentation tank which is followed by a secondary treatment tank?

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Q. What is the detention time considered while designing a primary sedimentation tank which is followed by an activated sludge treatment tank?

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Q. What is the weir loading rate assumed while designing a primary sedimentation tank which comes prior to a secondary settling tank?

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Q. What is the range of width assumed while designing a rectangular tank?

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Q. While designing a rectangular primary sedimentation tank in what range the length should be assumed?

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Q. What is the range of diameter assumed while designing a circular tank?

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Q. What is the flight speed assumed while designing a circular tank?

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Q. What is the flight speed assumed while designing a rectangular tank?

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Q. Clarification removes most of the turbidity.

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Q. What is the first step in clarification?

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Q. The agglomeration of destabilized particles into large particles is called _________

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