Q. The detention time (t) of a settling tank, may be defined as the time required for

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Q. In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time

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Q. If D is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, is

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Q. During putrifaction process of sewage the gas given off, is

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Q. A circular sewer section is preferred to because

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Q. Assertion (A) : The minimum self cleansing velocity in the sewer, at least once a day, must be generated. Reason (R) : If certain deposition takes place and is not removed, it obstructs free flow and causes further deposition leading to complete blocking of the sewer.

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Q. Discrete or granular particles change their

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Q. For a peak discharge of 0.0157 cumec, with a velocity of 0.9 m/sec, the diameter of the sewer main, is

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Q. For design of sewers, percentage of sewage discharge is assumed

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Q. In case of sewer lines

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Q. The sewerage system originates from

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Q. In septic tanks, decomposition of organic bacteria, is done by

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Q. The stone ware sewers

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Q. 'Cowl' is provided at

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Q. The sewer which transports the sewage to the point of treatment, is called

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Q. Kjedahl nitrogen is a mixture of

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Q. Drop manholes at the junctions of sewer lines, are provided if

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Q. The most effective arrangement for diverting excess storm water into a natural drainage, is

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Q. Large diameter sewers subjected to external pressure alone, are reinforced

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Q. Pick up the correct statement from the following :

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