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Chemical Engineering :: Fluid Mechanics

  1. Which of the following is a Newtonian fluid?

  2. A.
    Rubber latex
    B.
    Sewage sludge
    C.
    Quicksand
    D.
    Non-colloidal solution

  3. Which of the following valves will incur maximum pressure drop for the same discharge of water ?

  4. A.
    Globe valve
    B.
    Gate valve
    C.
    Needle valve
    D.
    Butterfly valve

  5. Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.

  6. A.
    less than
    B.
    more than
    C.
    same as
    D.
    none of these

  7. In deriving Bernoulli's equation, fluid is assumed to be

  8. A.
    incompressible, frictionless, steady, along a streamline.
    B.
    uniform, steady, incompressible, along a streamline.
    C.
    steady, density being pressure dependent, frictionless.
    D.
    none of these.

  9. Unit of mass velocity is

  10. A.
    kg/hr
    B.
    kg/m2. hr
    C.
    kg/m2
    D.
    kg/m3. hr

  11. With increase in molecular weight of the gas, the head developed by a centrifugal compressor will

  12. A.
    decrease
    B.
    increase
    C.
    remain same
    D.
    unpredictable

  13. Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).

  14. A.
    H
    B.
    12.6 H
    C.
    13.6 H
    D.
    14.6 H

  15. The boundary layer thickness at a given section along a flat plate __________ with increasing Reynold's number.

  16. A.
    increases
    B.
    decreases
    C.
    remains same
    D.
    may increase or decrease

  17. Low specific speed of a pump implies that, it is a/an __________ pump.

  18. A.
    axial flow
    B.
    centrifugal
    C.
    mixed flow
    D.
    none of these

  19. Pressure drop for laminar fluid flow through a circular pipe is given by