Q. Average annual rainfall at any station is the average of annual rainfall over a period of

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Q. Time of concentration

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Q. If four fires break out in a city of population 40 lakhs and if each hydrant has three streams and duration of each fire is four hours, the total quantity of water required, is

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Q. The fire demand of a city may be worked out by

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Q. Aeration of water is done to remove

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Q. The yield of a rapid gravity filter as compared to that of slow sand filter, is

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Q. Water supply system includes

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Q. Corrosion of a pipe

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Q. Pick up the correct statement from the following :

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Q. Most commonly used pump for lifting water in water supply mains, is

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Q. Economic height of a dam is the height corresponding to which

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Q. Distribution mains of any water supply, is normally designed for its average daily requirement

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Q. If pH value of water is

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Q. In pressure supply mains, water hammer pressure is reduced by providing

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Q. Asbestos pipes are

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Q. The maximum depth of sedimentation tanks is limited to

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Q. By boiling water, hardness can be removed if it is due to

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Q. For determining the velocity of flow of underground water, the most commonly used non-empirical formula is

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Q. The least thickness of class B cast iron (spun) pipe, is

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Q. According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

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