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Chemical Engineering :: Fluid Mechanics

  1. Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is


  2. Design of the casing of centrifugal pump should be such as to minimise the

  3. A.
    back flow through impeller
    B.
    loss of kinetic head
    C.
    loss of static head
    D.
    none of these

  4. Which of the following is used for pumping crude oil from oil well ?

  5. A.
    Single stage centrifugal pump
    B.
    Gear pump
    C.
    Screw pump
    D.
    Duplex/triplex reciprocating pump

  6. The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the

  7. A.
    length is shorter.
    B.
    throat diameter is more.
    C.
    sudden expansion of flow in the downstream occurs.
    D.
    distance between the throat and the inlet is more.

  8. __________ flow means the flow of incompressible fluid with no shear.

  9. A.
    Potential
    B.
    Streamline
    C.
    Creep
    D.
    Boundary layer

  10. The continuity equation

  11. A.
    relates mass flow rate along a stream tube.
    B.
    relates work and energy.
    C.
    stipulates that Newton's second law of motion must be satisfied at every point in the fluid.
    D.
    none of these.

  12. The energy loss over a length of pipeline according to Darcy-Weisbach equation for pipe flow is.....the mean velocity of flow.

  13. A.
    directly proportional to
    B.
    directly proportional to square of
    C.
    inversely proportional to
    D.
    inversely proportional to square of

  14. Pressure drop in a packed bed for laminar flow is given by the __________ equation.

  15. A.
    Kozney-Karman
    B.
    Blake-Plummer
    C.
    Leva's
    D.
    Fanning friction factor

  16. The fluid velocity varies as the cube of the cylinderical pipe diameter in case of steady state laminar flow at constant pressure drop for __________ fluid.

  17. A.
    Newtonion
    B.
    pseudoplastic
    C.
    dilatent
    D.
    Bingham plastic

  18. Stoke's law is valid, when NRe, p is less than

  19. A.
    2
    B.
    100
    C.
    2100
    D.
    700