The terminal velocity of a small sphere settling in a viscous fluid varies as the___________________?

Related Mcqs:

1. For a particle settling in water at its terminal settling velocity, which of the following is true ?

   A. Buoyancy = weight + drag
   B. Weight = buoyancy + drag
   C. Drag = buoyancy + weight
   D. Drag = weight

2. 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

3. The terminal velocity of a particle moving through a fluid varies as dp n. The value of n is equal to _______________ in Stoke’s law regime?

   A. 1
   B. 0.5
   C. 2
   D. 1.5

4. 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

5. In Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the ______________ of its diameter?

   A. Inverse
   B. Square root
   C. Second power
   D. First power

6. 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

7. For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is _______________?

   A. More
   B. Less
   C. Equal
   D. More or less, depending on the type of particle

8. For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the___________________?

   A. Square of the radial distance
   B. Radial distance linearly
   C. Inverse of the radial distance
   D. Elevation along vertical direction

9. In the Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is ______________ the fluid viscosity?

   A. Directly proportional to
   B. Inversely proportional to
   C. Inversely proportional to the square root of
   D. Independent of

10. The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for ______________ fluid?

    A. Newtonian
    B. Dilatant
    C. Pseudo-plastic

    D. Non-Newtonian