1.

For a smooth conduit, which of the following is the value of friction factor (f) for laminar and turbulent flow respectively?(a) 10/Re, 0.0791(Re)^-0.25(b) 16/Re, 0.0791(Re)^-0.25(c) 10/Re, 0.0771(Re)^-0.25(d) 16/Re, 0.0171(Re)^-0.25

Answer» Correct choice is (b) 16/Re, 0.0791(Re)^-0.25

The explanation: For a smooth conduit, the value of f is given by the equations

f = 16/Re for laminar flow (Re < 2000),

f = 0.0791(Re)^-0.25 for turbulent flow (Re > 2000),

Where, Re is Reynolds number.


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