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Chemical Engineering :: Fluid Mechanics

  1. In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )

  2. A.
    1/T
    B.
    1/T
    C.
    T
    D.
    T

  3. Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is

  4. A.
    Q/2
    B.
    Q/4
    C.
    Q/8
    D.
    Q/16

  5. Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient
    Cc = co-efficient of contraction

    Cv = co-efficient of velocity
    )

  6. A.
    Cd = Cc/Cv
    B.
    Cd = Cc.Cv
    C.
    Cd = Cv/cc
    D.
    none of these

  7. In an incompressible fluid, the density is

  8. A.
    greatly affected by moderate changes in pressure.
    B.
    greatly affected only by moderate changes in temperature.
    C.
    not affected with moderate change in temperature & pressure.
    D.
    sensible to changes in both temperature & pressure.

  9. Check valves are used

  10. A.
    at high pressure.
    B.
    in bends.
    C.
    for controlling water flow.
    D.
    for unidirectional flow.

  11. Velocity distribution for flow between two fixed parallel plates

  12. A.
    varies parabolically across the section.
    B.
    is constant over the entire cross-section.
    C.
    is zero at the plates and increases linearly to the midplane.
    D.
    none of these.

  13. Priming is needed in a __________ pump.

  14. A.
    reciprocating
    B.
    gear
    C.
    centrifugal
    D.
    diaphragm

  15. An ideal nozzle design aims at

  16. A.
    minimising wall friction.
    B.
    suppressing boundary layer separation.
    C.
    both (a) & (b).
    D.
    neither (a) nor (b).

  17. Which of the fluid forces are not considered in the Reynold's equation of flow ?

  18. A.
    Viscous forces
    B.
    Turbulent forces
    C.
    Pressure forces
    D.
    Compressibility forces

  19. A mono pump is a __________ pump.

  20. A.
    centrifugal
    B.
    piston
    C.
    positive acting rotary
    D.
    a group of vacuum