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GATE Civil Engineering (CE) 2019 Shift 1 Solved Paper

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Question : 60

Total: 65

Two water reservoirs are connected by a siphon (running full) of total length 5000m and diameter of 0.10m, as shown below (figure not drawn to scale).

The inlet leg length of the siphon to its summit is 2000m. The difference in the water surface levels of the two reservoirs is 5m. Assume the permissible minimum absolute pressure at the summit of siphon to be 2.5m of water when running full. Given: friction factor f=0.02 throughout, atmospheric pressure =10.3m of water, and acceleration due to gravity g=9.81 m∕s2. Considering only major loss using Darcy- Weisbach equation the maximum height of the summit of siphon from the water level of upper reservoir, h (in m round off to 1 decimal place) is

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