GATE ME 2014 Set 3 — Question 53
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Fluid Mechanics → Fluid Kinematics & Dynamics → Applications of Bernoulli
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Question
A siphon is used to drain water from a large tank as shown in the figure below. Assume that the level of water is maintained constant. Ignore frictional effect due to viscosity and losses at entry and exit. At the exit of the siphon, the velocity of water is

Correct answer
(B) √(2g(Z_P - Z_R))
Solution
Applying Bernoulli's equation between the free surface of the tank (point P) and the exit of the siphon (point R):Since both points are open to the atmosphere, . For a large tank, the velocity at the surface is negligible, so . The equation simplifies to:
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