Stoke’s law is valid, when the particle Reynolds number is ______________________?

Related Mcqs:

1. A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke’s law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity ?

   A. Same as that of A B. One fourth as that of A C. Twice as that of A D. Four times as that of A...

2. The Navier-Stokes equation deals with the law of conservation of___________________?

   A. Mass B. Energy C. Both A. & B. D. Momentum...

3. Stoke’s equation is valid in the Reynolds number range__________________?

   A. 0.01 to 0.1 B. 0.1 to 2 C. 2 to 10 D. 10 to 100...

4. A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation ?

   A. Inertial and drag forces are important B. Drag, gravitational and buoyancy forces are important C. Drag force and gravitational forces are important D. None of the above...

5. Creeping flow around a sphere is defined, when particle Reynolds number is___________________?

   A. < 2100 B. < 0.1 C. > 2.5 D. < 500...

6. Brownian movement is prominent in the particle size range of _____________ microns in case of settling of a particle in a fluid?

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

7. Navier-Stokes equation is useful in the analysis of _____________ fluid flow problems?

   A. Non-viscous B. Viscous C. Turbulent D. Rotational...

8. Stoke’s law is valid, when NRe, p is less than_________________?

   A. 2 B. 100 C. 2100 D. 700...

9. Pascal’s law is valid, only when the fluid is_____________________?

   A. Frictionless and at rest B. At rest C. At rest and when the frictionless fluid is in motion D. None of these...

10. The terminal velocity of a particle moving through a fluid varies as dp n. What is the value of n’ for Newton’s law regime ?

    A. 0.5 B. 1 C. 1.5 D. 3...