Home / Chemical Engineering / Fluid Mechanics :: Section 7

Chemical Engineering :: Fluid Mechanics

  1. The rate of change of moment of momentum represents the __________ by the fluid.

  2. A.
    torque applied
    B.
    force exerted
    C.
    work done
    D.
    power developed

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Cd for the orifice plate varies from

  4. A.
    0.58 to 0.8
    B.
    0.93 to 0.98
    C.
    0.2 to 0.3
    D.
    0.02 to 0.03

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. The discharge through a V-notch weir varies as

  6. A.
    H3/2
    B.
    H1/2
    C.
    H5/2
    D.
    H2/3

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. Water flow rate in a pipe of 3.5 metres diameter can be most economically and conveniently measured by a/an

  8. A.
    pitot tube
    B.
    venturimeter
    C.
    orificemeter
    D.
    rotameter

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. The specific speed of a pump is defined as the speed of a unit of such a size, that it

  10. A.
    delivers unit discharge at unit head.
    B.
    requires unit power for unit head.
    C.
    delivers unit discharge at unit power.
    D.
    none of these.

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. In case of venturimeters, friction losses are about __________ percent of maximum velocity head.

  12. A.
    2
    B.
    8
    C.
    12
    D.
    20

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. With increase in the schedule number of a pipe of a particular nominal size, the

  14. A.
    wall thickness also increases.
    B.
    I.D. of the pipe decreases.
    C.
    O.D. of the pipe remains constant.
    D.
    all (a), (b) and (c)

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Turbine impeller

  16. A.
    produces only radial current.
    B.
    produces only tangential current.
    C.
    is effective over wide range of viscosities.
    D.
    does not produce tangential current.

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. Friction produced by the formation of wakes is called the __________ friction.

  18. A.
    disk
    B.
    skin
    C.
    form
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)

  20. A.
    ηma x ηm x ηv = ηo
    B.
    ηm = ηv . ηma
    C.
    ηma = ηm x ηv
    D.
    ηv = ηm x ηma

    View Answer

    Workspace

    Discuss Discuss in Forum