For laminar flow in circular pipes, the Darcy’s friction factor f is equal to

Related MCQs

• For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is
• The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is
• 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 value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to
• 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)
• The velocity at which the flow changes from laminar flow to turbulent flow is called
• A liquid flows through pipes 1 and 2 with the same flow velocity. If the ratio of their pipe diameters d1 : d2 be 3:2, what will be the ratio of the head loss in the two pipes?
• A liquid flowss through two similar pipes 1 and 2. If the ratio of their flow velocities v1 : v2 be 2:3, what will be the ratio of the head loss in the two pipes?
• Coefficient of friction of a laminar flow is_________
• Coefficient of friction of a laminar flow is_________