A straight 100 m long raw water gravity main is to carry water from an intake structure to the jack well of a water treatment plant. The required flow through this water main is 0.21 m 3 /s. Allowable velocity through the main is 0.75 m/s. Assume f = 0.01, g = 9.81 m/s 2 . The minimum gradient (in cm/100 m length) to be given to this gravity main so that the required amount of water flows without any difficulty is ___________

GATE Civil Engineering (CE) 2014 Shift 1 Solved Paper

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A straight 100 m long raw water gravity main is to carry water from an intake structure to the jack well of a water treatment plant. The required flow through this water main is 0.21 m³ /s. Allowable velocity through the main is 0.75 m/s. Assume f = 0.01, g = 9.81 m/s² . The minimum gradient (in cm/100 m length) to be given to this gravity main so that the required amount of water flows without any difficulty is ___________

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