Newton’s law of viscosity relates the____________________?

Related Mcqs:

1. As per Newton’s law of viscosity, the shear stress for a given rate of angular deformation of fluid is proportional to (where, μ = fluid viscosity) ?

   A. 1/μ
   B. μ
   C. μ2
   D. 1/μ2

2. What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air ?

   A. 4πg/3
   B. 0.01 πgH/4
   C. 0.01 πgH/8
   D. 0.04 πgH/3

3. Which law/principle of solid mechanics is similar/equivalent to Newton’s law of viscosity in fluid mechanics ?

   A. Archimedes principle
   B. Newton’s second law of motion
   C. Hooke’s law
   D. Newton’s third law of motion

4. Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton’s law of viscosity. (II) Newton’s second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to boundary. (V) Fluid cannot penetrate a boundary?

   A. I, II, III
   B. II, III, V
   C. I, II, V
   D. II, IV, V

5. A gas (density = 1.5 kg/m3, viscosity = 2 × 10‒5 kg/m.s) flowing through a packed bed (particle size = 0.5 cm, porosity = 0.5) at a superficial velocity of 2 m/s causes a pressure drop of 8400 Pa/m. The pressure drop for another gas, with density of 1.5 kg/m3and viscosity of 3 × 10‒5kg/m.s flowing at 3 m/s will be________________?

   A. 8400 Pa/m
   B. 12600 Pa/m
   C. 18900 Pa/m
   D. 16800 Pa/m

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. 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

8. Specific speed of a centrifugal pump relates it with another pump having the___________________?

   A. Dynamic similarity
   B. Same efficiency
   C. Same speed
   D. Geometrical similarity

9. In the complete turbulence zone (in rough pipes), the____________________?

   A. Rough and smooth pipes have the same friction factor
   B. Laminar film covers the roughness projections
   C. Friction factor depends upon NRe only
   D. Friction factor is independent of the relative roughness

10. The head developed by a centrifugal pump is largely determined by the____________________?

    A. Power of the pump
    B. Nature of the liquid being pumped
    C. Angle of the vanes and the speed of the tip of the impeller
    D. Vapour pressure of the liquid