Water Supply Engineering While determining the yield of open wells by the pumping test Velocity of recharging water, increases with depression head Depression head resulting at critical velocity, is called critical depression head Maximum safe yield of an open well, is expected at critical depression head Working head is generally limited to ?rd of the critical depression head Velocity of recharging water, increases with depression head Depression head resulting at critical velocity, is called critical depression head Maximum safe yield of an open well, is expected at critical depression head Working head is generally limited to ?rd of the critical depression head ANSWER DOWNLOAD EXAMIANS APP
Water Supply Engineering Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be 10 5 nil 15 10 5 nil 15 ANSWER DOWNLOAD EXAMIANS APP
Water Supply Engineering For determining the velocity of flow of underground water, the most commonly used non-empirical formula is Darcy’s formula Slichter’s formula Lacy’s formula Hazen’s formula Darcy’s formula Slichter’s formula Lacy’s formula Hazen’s formula ANSWER DOWNLOAD EXAMIANS APP
Water Supply Engineering By boiling water, hardness can be removed if it is due to magnesium sulphate calcium sulphate calcium nitrate calcium bicarbonate magnesium sulphate calcium sulphate calcium nitrate calcium bicarbonate ANSWER DOWNLOAD EXAMIANS APP
Water Supply Engineering The least thickness of class B cast iron (spun) pipe, is 7.9 mm 7.2 mm 8.6 mm 10 mm 7.9 mm 7.2 mm 8.6 mm 10 mm ANSWER DOWNLOAD EXAMIANS APP
Water Supply Engineering 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 600 450 500 400 600 450 500 400 ANSWER DOWNLOAD EXAMIANS APP
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