GATE CE 2020 Set 2 — Question 59
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Water Resources Engineering → Pipe Flow → Darcy-Weisbach Equation
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Question
A cast iron pipe of diameter and length carries water from a tank and discharges freely into air at a point below the water surface in the tank. The friction factor of the pipe is . Consider acceleration due to gravity as . The velocity of the flow in pipe (in m/s, round off to two decimal places) is ________.
Correct answer
2.4 to 2.7
Solution
Applying Bernoulli's equation between the tank surface (1) and the pipe exit (2):Neglecting minor entry loss as it's not specified:Rounding to two decimal places, the velocity is .
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