Q. Air valves are generally provided in pressure pipes of water supply

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Q. Pick up the correct statement from the following :

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Q. Bacterias which can survive with or without free oxygen, are known

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Q. The rate of silting in a reservoir

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Q. Estimates of a water supply project depends upon the rate of water supply per capita consumption and probable population estimated at the end of the design period of

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Q. In centrifugal pump installation,

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Q. Pipes are laid parallel

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Q. Maximum permissible colour for domestic water supplies, based on Cobalt scale, is

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Q. In distribution pipes, air valves are provided at

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Q. The flow of water gets retarded, in

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Q. Surcharge storage zone of a reservoir, is

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Q. Surface water may

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Q. For a city developed haphazardly, the layout of distribution pipes preferred to, is

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Q. Velocity of flow of water in plain sedimentation water tank, is normally kept

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Q. The most important and widely used tube well in India, is

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Q. Pick up the correct statement from the following :

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Q. The maximum permissible chloride content in treated water of public water supplies should not exceed

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Q. To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36, 00, 000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 √Q, the water horse power of the pump is

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Q. The maximum permissible colour for domestic supplies based on cobalt scale, is

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Q. The dilution ratio at which the odour is hardly detectable is generally called threshold odour number and for public supplies it should not exceed

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