Fluid Mechanics (Chemical Perspective) – Multiple Choice Questions (MCQs)

1. 37. What is 'Stokes' Law' used for?

   • A. To calculate the drag force on a spherical particle in laminar flow
   • B. To calculate the drag force in turbulent flow
   • C. To calculate pressure drop in pipes
   • D. To calculate heat transfer rates

2. 38. What is 'drag force'?

   • A. The force exerted by a fluid on a solid object in the direction of flow
   • B. The force exerted by a fluid on a solid object perpendicular to flow
   • C. The force exerted by a solid object on a fluid
   • D. The force of gravity

3. 39. What is the 'drag coefficient' (C_D)?

   • A. A dimensionless quantity that quantifies the drag or resistance of an object in a fluid environment
   • B. A measure of fluid viscosity
   • C. A measure of fluid density
   • D. A measure of object size

4. 40. What is a 'venturi meter' used for?

   • A. To measure fluid flow rate based on pressure drop
   • B. To measure fluid temperature
   • C. To measure fluid density
   • D. To measure fluid viscosity

5. 41. What is an 'orifice meter' used for?

   • A. To measure fluid flow rate based on pressure drop through a constricted opening
   • B. To measure fluid temperature
   • C. To measure fluid density
   • D. To measure fluid viscosity

6. 42. What is a 'rotameter' used for?

   • A. To measure fluid flow rate using a float in a tapered tube
   • B. To measure fluid pressure
   • C. To measure fluid temperature
   • D. To measure fluid density

7. 43. What is the 'pitot tube' used for?

   • A. To measure local fluid velocity at a point
   • B. To measure average fluid velocity
   • C. To measure fluid pressure
   • D. To measure fluid temperature

8. 44. What is 'non-ideal flow' in pipes?

   • A. Flow that deviates from the assumptions of ideal flow (e.g.
   • B. due to friction
   • C. compressibility)
   • D. Ideal flow

9. 45. What is the 'boundary layer' concept in fluid flow?

   • A. A thin layer of fluid near a solid surface where viscous effects are significant
   • B. A region of uniform velocity
   • C. A region of zero velocity
   • D. A region of high pressure

10. 46. What is 'separation of flow'?

    • A. The detachment of the boundary layer from the surface of an object
    • B. leading to increased drag
    • C. The attachment of the boundary layer to the surface
    • D. Smooth flow

11. 47. What is a 'weir'?

    • A. A barrier across a fluid channel to control flow and measure flow rate
    • B. A type of pump
    • C. A type of valve
    • D. A type of filter

12. 48. What is a 'vent'?

    • A. An opening in a vessel or pipe for the release of gas or vapor
    • B. A device for controlling liquid flow
    • C. A device for heating
    • D. A device for mixing