Poise is converted into stoke by ___________________?

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. One poise (unit of absolute/dynamic viscosity) is equivalent to one_____________________?

   A. gm/cm2. sec
   B. gm/cm. sec
   C. cm2/sec
   D. m2/sec

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. Drag co-efficient CD, in Stoke’s law range is given by________________?

   A. CD = 16/Re.p
   B. CD = 24/Re.p
   C. CD = 18.4/Re.p
   D. CD = 0.079/Re
   0.25.p

5. 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

6. 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

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

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

8. 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

9. 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

10. Which of the following fluid forces are not considered in the Navier-Stoke’s equation ?

    A. Gravity forces
    B. Viscous forces
    C. Pressure forces
    D. Turbulent forces