Q. The standard B.O.D. at 20°C, is taken for the consumption in

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Q. A water channel supported above the ground over trestles, is generally called

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Q. One degree of hardness of water means a content of salts of

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Q. Mostly used coagulant, is

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Q. Hard water for public water supply is discarded because

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Q. Pick up the correct statement from the following regarding radial flow centrifugal pumps :

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Q. Quality of water is said to be good if it is

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Q. Pick up the incorrect statement from the following :

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Q. The main draw-back of centrifugal pump, is

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Q. The bacterias which require free oxygen for their survival, are called

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Q. Maximum threshold number permitted for indicating the odour of public water supplies, is

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Q. 45 litres of water per person per day, is provided in

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Q. Turbidity of water may be caused due to

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Q. Pick up the correct statement from the following :

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Q. The maximum pressure to which cast iron pipes may be subjected to, is

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Q. The type of pipe commonly used in water supply distribution schemes, is

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Q. The population of a city in 2000 is 50, 000. The average per decade of the previous records of population is 5000 and average percentage per decade is 20%. The population of the city based on geometrical increase method, in the year 2020 will be

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Q. Mud balls may be removed by

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Q. For maximum alkalinity of water, pH value should be

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Q. The fire demand for a city of 50, 000 population, according to Godrich formula, is

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