Related Mcqs:

1. A fluid which has a linear relationship between the magnitude of applied shear-stress and the resulting rate of deformation is called a/an _____________ fluid?

   A. Newtonian
   B. Non-Newtonian
   C. Ideal
   D. Incompressible

2. A Bingham fluid of viscosity μ = 10 Pa.s and yield stress, η0 = 10 KPa, is shared between flat parallel plates separated by a distance of 10-3 m. The top plate is moving with a velocity of 1 m/s. The shear stress on the plate is________________?

   A. 10 KPa
   B. 20 KPa
   C. 30 KPa
   D. 40 KPa

3. 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

4. The rate of shear versus the shear stress curves are time dependent for _____________ fluid?

   A. Thixotropic
   B. Rheopectic
   C. Both A. & B.
   D. Neither A. nor B.

5. A fluid whose apparent viscosity increases with shear rate is termed as the _____________ fluid?

   A. Newtonian
   B. Viscous
   C. Dilatant
   D. Non-viscous

6. Deformation drag, which is caused by widespread deformation of fluid around the immersed body____________________?

   A. Occurs when NRe is very small
   B. Is primarily a friction drag
   C. Is independent of body length
   D. Depends mainly on cross-sectional shape

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. An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic ?

   A. Sewage sludge
   B. Rubber latex
   C. Blood
   D. Sugar solution

9. 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

10. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a _____________ fluid?

    A. Bingham
    B. Newtonian
    C. Perfect
    D. None of these