A. ∂u/∂x = 0
B. ∂(ρu)/∂x = 0
C. (∂u/∂x) = – (∂ρ/∂t)
D. ∂ρ/∂t = 0
Related Mcqs:
- Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
A. A, C, D
B. B, D, E
C. A, B, E
D. A, D, E - In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow ?
A. Discharge of water by a centrifugal pump being run at a constant rpm
B. Water flow in the suction and discharge pipe of a reciprocating pump
C. Water discharge from a vertical vessel in which constant level is maintained
D. Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe - A pipe has a porous section of length L as shown in the figure. Velocity at the start of this section of V0. If fluid leaks into the pipe through the porous section at a volumetric rate per unit area q(x/L)2, what will be axial velocity in the pipe at any „x‟? Assume incompressible one dimensional flow i.e., no gradients in the radial direction ?
A. VX = V0 + q (x3/L2D)
B. VX = V0 + ⅓q (x3/L2)
C. VX = V0 + 2q (x2/LD)
D. VX = V0 + (4/3) q (x3/L2D) - Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton’s law of viscosity. (II) Newton’s second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to boundary. (V) Fluid cannot penetrate a boundary?
A. I, II, III
B. II, III, V
C. I, II, V
D. II, IV, V - The continuity equation in ideal fluid flow states that__________________?
A. Net rate of inflow into any small volume must be zero
B. Energy is not constant along a streamline
C. Energy is constant along a streamline
D. There exists a velocity potential - In an incompressible flow of fluid, the fluid ________________?
A. Temperature remains constant
B. Compressibility is greater than zero
C. Density does not change with pressure & temperature
D. Is frictionless - For turbulent flow of an incompressible fluid through a pipe, the flow rate „Q‟ is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is_________________?
A. 1
B. 0
C. < 1
D. > 1 - ____________ flow means the flow of incompressible fluid with no shear ?
A. Potential
B. Streamline
C. Creep
D. Boundary layer - In a fully turbulent flow (Re > 105) in a pipe of diameter ‘d’, for a constant pressure gradient, the dependence of volumetric flow rate of an incompressible fluid is_______________?
A. d
B. d2
C. d2.5
D. d4 - In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant ?
A. Rotational
B. Unsteady
C. Turbulent
D. Non-uniform
