Q. Aerobic activity is maximum

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Q. In sewers designed with self cleansing velocity,

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Q. Which one of the following resists hydrogen sulphide corrosion

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Q. The sewerage system consists of

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Q. Hume steel pipes are

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Q. The minimum diameter of a sewer is kept

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Q. The minimum diameter of sewer to be adopted is

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Q. To test chemical oxygen demand (C.O.D.) of sewage, organic matter is oxidised by pottassium dichromate in the presence of

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Q. The discharge per unit plan area of a sedimentation tank, is generally called

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Q. To maintain aerobic biological activity, the moisture content of the compost mass should be about

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Q. The sewer that unloads the sewage at the point of treatment is called

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Q. No treatment of the sewage is given if dilution factor is

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Q. R.M.O. expenses include

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Q. For drainage pipes in buildings the test applied before putting them to use, is

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Q. The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called

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Q. If the discharge of a sewer running half is 628 1.p.s., i = 0.001, and n = 0.010, the diameter of the sewer, is

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Q. For efficient working of a sewer, it must be ensured that

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Q. A manhole is generally provided at each

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Q. Pick up the correct statement from the following :

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Q. The pressure exerted by

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