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

Related Mcqs:

1. The ratio of the wall drag to the form drag in the Stoke’s law range (for motion of spherical particles in a stationary fluid) is__________________?

   A. 0.5
   B. 1
   C. 2
   D. 0.33

2. Drag co-efficient in hindered settling is _____________ that in free settling?

   A. Less than
   B. Equal to
   C. Not necessarily greater than
   D. Always greater than

3. Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke’s law range is_________________?

   A. 24/NRe,P
   B. 16/NRe,P
   C. 64/NRe,P
   D. 48/NRe,P

4. 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

5. In hindered settling, the particles are_________________________?

   A. Placed farther from the wall
   B. Not affected by other particles and the wall
   C. Near each other
   D. None of these

6. 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

7. For the free settling of a spherical particle through a fluid, the slope of, CD-log NRe, plot is____________________?

   A. 1
   B. -1
   C. 0.5
   D. -0.5

8. 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

9. In which of the following body shapes, the pressure drag is large compared to the friction drag ?

   A. Stream line body
   B. Two dimensional body
   C. Bluff body
   D. None of these

10. 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