Chemical Engineering Interview Guide Fluid Mechanics - Set 48 - ObjectiveBooks

Chemical Engineering Interview Guide Fluid Mechanics - Set 48

Practice Test: Question Set - 48

1. At low Reynolds number
    (A) Viscous forces are unimportant
    (B) Viscous forces control
    (C) Viscous forces control and inertial forces are unimportant
    (D) Gravity forces control

2. The Stoke's stream function applies to the
    (A) Irrotational flow only
    (B) Ideal/non viscous fluids only
    (C) Cases of axial symmetry
    (D) None of these

3. Transition from laminar flow to turbulent flow is aided by the
    (A) Surface roughness and curvature (i.e. sharp corners)
    (B) Vibration
    (C) Pressure gradient and the compressibility of the flowing medium
    (D) All (a), (b) & (c)

4. When larger particles e.g., grains are subjected to fluidization, the corresponding bed produced is termed as the __________ bed.
    (A) Spouted
    (B) Sluggish
    (C) Boiling
    (D) Teeter

5. 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

6. The discharge through a V-notch weir varies as
    (A) H3/2
    (B) H1/2
    (C) H5/2
    (D) H2/3

7. The simple Pitot tube does not measure the
    (A) Static pressure
    (B) Dynamic pressure
    (C) Velocity at the stagnation point
    (D) All (a), (b) and (c)

8. __________ forces act on a particle moving through a stationary fluid.
    (A) Gravity
    (B) Drag
    (C) Buoyant
    (D) All (a), (b), & (c)

9. Specific speed of a centrifugal pump depends upon the __________ head.
    (A) Suction
    (B) Delivery
    (C) Manometric
    (D) None of these

10. For flow through a venturi at a particular discharge, the correct relationships among heads at points X, Y, and Z are

    (A) h1 > h2 < h3
    (B) h1 > h2 > h3
    (C) h2 < h1 < h3
    (D) h1 < h2 < h3

11. Multistage centrifugal pumps are generally used for
    (A) High head
    (B) Low head but high discharge
    (C) Highly viscous liquid
    (D) Slurries of high solid concentration

12. The simple Pitot tube measures the __________ pressure.
    (A) Static
    (B) Dynamic
    (C) Total
    (D) None of these

13. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.
    (A) Manometric
    (B) Total
    (C) Static
    (D) Friction

14. Two liquids manometer is used for measuring small pressure differences in
    (A) Liquids
    (B) Gases
    (C) Mixture of hydrocarbons
    (D) None of these

15. Air vessel provided in a reciprocating pump is for
    (A) Increasing the acceleration head
    (B) Making the friction in pipe uniform
    (C) Decreasing the acceleration head
    (D) None of these

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