A. Fixed in space in steady flow
B. Always the path of particle
C. Drawn normal to the velocity vector at every point
D. A line connecting the mid points of flow cross-section
Related Mcqs:
- A stream tube is that, which has ______________________ cross-section entirely bounded by stream lines?
A. A circular
B. Any convenient
C. A small
D. A large - The line traced by a single fluid particle as it moves over a period of time is called ______________ line?
A. Stream
B. Path
C. Equipotential
D. None of these - The distribution of shear stress in a stream of fluid in a circular tube is_____________________?
A. Linear with radius for turbulent flow only
B. Linear with radius for laminar flow only
C. Linear with radius for both laminar & turbulent flow
D. Parabolic with radius for both laminar & turbulent flow - Two dimensional stream function________________?
A. Relates velocity and pressure
B. Is constant along a stream line
C. Is constant along an equipotential surface
D. None of these - The Stoke’s stream function applies to the________________?
A. Irrotational flow only
B. Ideal/non i viscous fluids only
C. Cases of axial symmetry
D. None of these - In Newton’s law range, the drag co-efficient for the motion of spherical particle in a stationary fluid is___________________?
A. 0.44
B. 0.044
C. 4.4
D. 44 - Prandtl mixing length is___________________?
A. Applicable to laminar flow problems
B. A universal constant
C. Zero at the pipe wall
D. None of these - The vent valve provided in a liquid handling centrifugal pump is___________________?
A. Generally a needle valve
B. Used to release any gases that might be vapour locking the pump
C. Helpful in easy removal of samples
D. All A., B. and C. - N. second/m2 is___________________?
A. The S.I. unit of dynamic viscosity
B. The S.I. unit of kinematic viscosity
C. Equivalent to one poise
D. Equivalent to one stoke - Creeping flow around a sphere is defined, when particle Reynolds number is___________________?
A. < 2100
B. < 0.1
C. > 2.5
D. < 500
