Q. Primary treatment of sewage consists of removal of

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Q. If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is

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Q. The maximum diameter of sewers adopted in the designs is

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Q. Sluge banks are formed if sewage is disposed of in

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Q. Design period of 40 to 50 years is adopted for

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Q. The pH value of sewage is determined with the help of

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Q. The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is

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Q. The design period in years for pumping plants, is

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Q. The Chezy's constant C in the formula V = C √rs depends upon

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Q. Afive day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is

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Q. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

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Q. The rainfall at any place may be determined by

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Q. In trickling filter, B.O.D. is reduced to

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Q. Which one of the following gases is most significant as air pollutant

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Q. Which one of the following statements regarding septic tanks is wrong :

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Q. In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,

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Q. If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is

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Q. The average temperature of sewage in India, is

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Q. The most widely used pump for lifting sewage is

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Q. The sewer which resists sulphide corrosion, is

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