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Chemical Engineering :: Fluid Mechanics

  1. A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump

  2. A.
    develops a lower head.
    B.
    capacity is reduced.
    C.
    requires more power.
    D.
    all (a), (b) and (c).

  3. In an incompressible flow of fluid, the fluid

  4. A.
    temperature remains constant.
    B.
    compressibility is greater than zero.
    C.
    density does not change with pressure & temperature.
    D.
    is frictionless.

  5. The ratio of maximum to average velocity in case of streamline flow between parallel plates is

  6. A.
    1
    B.
    1.5
    C.
    2
    D.
    2.5

  7. A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.

  8. A.
    circular
    B.
    rectangular
    C.
    triangular
    D.
    trapezoidal

  9. Pressure co-efficient is the ratio of pressure forces to __________ forces.

  10. A.
    gravity
    B.
    inertial
    C.
    viscous
    D.
    none of these

  11. Which of the following conditions must be satisfied for lift force to be developed ?

  12. A.
    The body should be bluff body.
    B.
    The body should be stream lined.
    C.
    Circulation around the body is essentially required.
    D.
    The main stream velocity must approach the velocity of sound in that fluid medium.

  13. The Reynolds number for an ideal fluid flow is

  14. A.
    4
    B.
    2100-4000
    C.
    4000
    D.