Choose the correct set of dimensions of viscosity that are equivalent (where, F, M, L, T are dimensions for force, mass, length and time respectively) ?

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. 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

3. 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

4. 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

5. The location of centre of pressure, which defines the point of application of the total pressure force on the surface, can be calculated by applying the principle of moments according to which “sum of the moment of the resultant force about an axis is equal to the sum of the components about the same axis”. The centre of pressure of a rectangular surface (of width ‘w’) immersed vertically in a static mass of fluid is at a depth of (where, y = depth of the liquid) ?

   A. 1/(y/3)
   B. 2y/3
   C. 1/(y/4)
   D. 3y/4

6. 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

7. For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) ?

   A. μ
   B. 1/μ
   C. √μ
   D. 1/√μ

8. A Newtonian liquid (ρ = density, μ = viscosity) is flowing with velocity „v‟ in a tube of diameter ‘D’. Let Δp be the pressure drop across the length ‘L’. For a laminar flow, Δp is proportional to_________________?

   A. Lρv2/D
   B. LμV/D2
   C. Dρv2/L
   D. μV/L

9. Equivalent length of a pipe fitting is____________________?

   A. Dependent on Reynolds number
   B. Independent of Reynolds number
   C. Dependent on the length of the pipe
   D. None of these

10. Choose the set of pressure intensities that are equivalent ?

    A. 4.33 psi, 10 ft. of water, 8.83 inches of Hg
    B. 4.33 psi, 10 ft. of water, 20.7 inches of Hg
    C. 10 psi, 19.7 ft. of water, 23.3 inches of Hg
    D. 10 psi, 19.7 ft. of water, 5.3 inches of Hg