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Chemical Engineering :: Fluid Mechanics

  1. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system ?

  2. A.
    Head & discharge
    B.
    Length & discharge
    C.
    Length & diameter
    D.
    Friction factor & diameter.

  3. The kinetic energy correction factor for velocity distribution of laminar flow is

  4. A.
    0.5
    B.
    1.66
    C.
    1
    D.
    2

  5. Priming of a centrifugal pump is done to

  6. A.
    increase the mass flow rate of fluid.
    B.
    develop effective pressure rise by the pump.
    C.
    avoid chances of separation inside the impeller.
    D.
    none of these.

  7. Bed pressure drop in an air fluidised bed of catalyst particles (ρp = 200 kg/m3, Dp = 0.05 cm) of 60 cm bed depth and bed porosity of 0.5 expressed in cm of water (manometer) is

  8. A.
    90
    B.
    60
    C.
    45
    D.
    30

  9. For pipes that must be broken at intervals for maintenance, the connector used should be a/an

  10. A.
    union
    B.
    tee
    C.
    reducer
    D.
    elbow

  11. A fluid is the one, which

  12. A.
    cannot remain at rest under the action of shear force.
    B.
    continuously expands till it fills any container.
    C.
    is incompressible.
    D.
    permanently resists distortion.

  13. One horsepower is equal to

  14. A.
    550 lbf.ft/second
    B.
    550 kgf.m/second
    C.
    both (a) and (b)
    D.
    550 lbf.ft./hr

  15. For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by


  16. A fluidis moving at critical flow condition (NRe = 2100) through a pipe of dia 3 cms. Velocity of flow is __________ cm/sec.

  17. A.
    7
    B.
    700
    C.
    7000
    D.
    630

  18. Capillary rise of mercury in a small diameter tube is proportional to (where, d = diameter of the tube, σ = surface tension of mercury)

  19. A.
    d
    B.
    1/d
    C.
    σ
    D.
    l/σ