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Chemical Engineering :: Fluid Mechanics

  1. Which of the following must be followed by the flow of a fluid (real or ideal)?
    (I) Newton's law of viscosity.
    (II) Newton's second law of motion.
    (III) The continuity equation.
    (IV) Velocity of boundary layer must be zero relative to boundary.
    (V) Fluid cannot penetrate a boundary.

  2. A.
    I, II, III
    B.
    II, III, V
    C.
    I, II, V
    D.
    II, IV, V

  3. Mach number is defined as the ratio of the local flow velocity to the sonic velocity in the fluid. For what value of Mach number, the gases are considered incompressible ?

  4. A.
    < 0.3
    B.
    > 3
    C.
    50
    D.
    1

  5. Boundary layer exists in flow

  6. A.
    of real fluids.
    B.
    over flat surfaces only.
    C.
    in pipes only.
    D.
    of ideal fluids only.

  7. Rubber latex is an example of __________ fluid.

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

  9. Velocity head on sudden enlargement in a horizontal pipe is converted into __________ head.

  10. A.
    elevation
    B.
    pressure
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

  11. The frictional resistance in laminar flow does not depend on the

  12. A.
    area of surface in contact.
    B.
    flow velocity.
    C.
    fluid temperature.
    D.
    pressure of flow.

  13. A venturimeter measures the

  14. A.
    velocity head
    B.
    pressure
    C.
    point velocity
    D.
    none of these

  15. Gradually varying fluid flow is an example of __________ flow.

  16. A.
    non-steady uniform
    B.
    non-steady non-uniform
    C.
    steady uniform
    D.
    steady non-uniform

  17. Drag is the force component exerted on an immersed object,

  18. A.
    passing the centroid of the body at 60°to the direction of motion.
    B.
    the component being parallel to theflow direction.
    C.
    the component being normal to the flow direction.
    D.
    none of these.

  19. To handle smaller quantity of fluid at higher discharge pressure, use a __________ pump.

  20. A.
    reciprocating
    B.
    centrifugal
    C.
    volute
    D.
    rotary vacuum