Category: Fluid Mechanics for Chemical

A. The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). Δp
B. In the equation, T. gc = k. (du/dy)n the value of ‘n’ for pseudoplastic and Dilatant fluid are 1 respectively
C. Shear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion
D. With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

A. 0.5
B. 1.66
C. 1
D. 2

A. Is not a function of Reynolds number
B. For a given Reynolds number remains constant even on further smoothening of the pipe
C. Is zero irrespective of the Reynolds number
D. None of these

A. Mean flow velocity is about 0.5 times the maximum velocity
B. Velocity profile becomes flatter and flatter with increasing Reynolds number
C. Point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius)
D. Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity
profile at the wall are more

A. 1
B. 10/55
C. 5.5
D. 1/55

A. Weir
B. Hot wire anemometer
C. Cup and vane anemometer
D. None of these

A. Turbulent flow
B. Laminar flow through an open channel
C. Steady flow
D. None of these

A. 2 to 3
B. 0.01 to 0.10
C. 200 to 300
D. 100 to 1000

A. μ
B. 1/μ
C. √μ
D. 1/√μ

A. Increase the mass flow rate of fluid
B. Develop effective pressure rise by the pump
C. Avoid chances of separation inside the impeller
D. None of these