For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is

Related MCQs

• According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)
• The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)
• For laminar flow in circular pipes, the Darcy’s friction factor f is equal to
• The diameter of the nozzle (d) for maximum transmission of power is given by (where D = Diameter of pipe, f = Darcy’s coefficient of friction for pipe, and l = Length of pipe)
• Flow at constant rate through a tapering pipe is i) steady flow ii) uniform flow iii) unsteady flow iv) non-uniform flow The correct answer is
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• The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow.)
• The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)
• Coefficient of friction of a laminar flow is_________
• Coefficient of friction of a laminar flow is_________