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

Related Mcqs:

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

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

2. 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

3. The continuity equation of fluid mechanics utilises the principle of conservation of _________________?

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

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. The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the _____________ equation?

   A. Nikuradse
   B. Von-Karman
   C. Blasius
   D. Colebrook

6. Colebrook equation for friction factor in turbulent flow is given by, f-0.5 = -4 loge [(ε/D) + (1.26/NRe √F). It reduces to Nikuradse equation for a value of (ϵ/D) equal to __________________?

   A. 0
   B. 1
   C. ∞
   D. 0.5

7. 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

8. 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

9. Viscosity of water at 40°C lies in the range of___________________?

   A. 1 × 10-3 to 2 × 10-3 kg/m.s
   B. 0.5 × 10-3 to 1 × 10-3 kg/m.s
   C. 1 to 2 kg/m.s
   D. 0.5 to 1 kg/m.s

10. In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of___________________?

    A. Relative roughness
    B. Absolute roughness
    C. Friction co-efficient for flows at equal Reynold number
    D. All A., B. & C.