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Chemical Engineering :: Fluid Mechanics

  1. Pick out the wrong statement about a streamline.

  2. A.
    It is always parallel to the main direction of the fluid flow.
    B.
    It is a line across which there is no flow and it is equivalent to a rigid boundary.
    C.
    Streamlines intersect at isolated point of zero velocity and infintie velocity.
    D.
    The fluid lying between any two streamlines can be considered to be in isolation and the streamline spacing varies inversely as the velocity.

  3. The most serious disadvantage of an orificemeter is that

  4. A.
    it is not very accurate.
    B.
    it is very costly.
    C.
    most of the pressure drop is not recoverable.
    D.
    it is not suitable for measuring gas flow.

  5. The discharge through a rectangular weir varies as

  6. A.
    H1/2
    B.
    H5/2
    C.
    H2/5
    D.
    H3/2

  7. A centrifugal pump has the following specifications:
    Power = 4 H.P.; Speed = 800 rpm
    Head = 8 metres
    Flow = 1000 litres/minutes.
    If its speed is halved, the power consumed now will be __________ hp.

  8. A.
    0.5
    B.
    2
    C.
    4
    D.
    1

  9. Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter.

  10. A.
    0.5
    B.
    5
    C.
    50
    D.
    100

  11. Disc compensators are provided in large diameter fuel gas carrying pipelines to

  12. A.
    keep the pipe in proper orientation.
    B.
    make the pipe joint leak-proof.
    C.
    account for contraction/expansion of pipe due to temperature changes of the surroundings.
    D.
    account for the pressure variation side the pipeline.

  13. Discharge from a 24 inch pipe of water at 10 ft/sec will be __________ ft3/sec.

  14. A.
    7.65
    B.
    32.36
    C.
    48.22
    D.
    125.6

  15. Paper pulp is an example of __________ fluid.

  16. A.
    dilatant
    B.
    bingham plastic
    C.
    Newtonion
    D.
    pseudoplastic