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Chemical Engineering :: Fluid Mechanics

  1. Curve III in the above diagram represents a/an

  2. A.
    dilatent fluid
    B.
    pseudo plastic fluid
    C.
    ideal plastic
    D.
    none of these

  3. What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe)?

  4. A.
    0.5
    B.
    1
    C.
    1.5
    D.
    2

  5. The line traced by a single fluid particle as it moves over a period of time is called __________ line.

  6. A.
    stream
    B.
    path
    C.
    equipotential
    D.
    none of these

  7. The pressure head on sudden contraction in a horizontal pipe is converted into the __________ head.

  8. A.
    elevation
    B.
    velocity
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)

  9. A stream tube is that, which has __________ cross-section entirely bounded by stream lines.

  10. A.
    a circular
    B.
    any convenient
    C.
    a small
    D.
    a large

  11. The unit of velocity head is

  12. A.
    ft-lb/sec
    B.
    ft-lb/ft3
    C.
    ft-lbf/lb
    D.
    ft-lbf/sec.

  13. Which of the following properties of a fluid is responsible for offering resistance to shear ?

  14. A.
    Surface tension.
    B.
    Viscosity.
    C.
    Specific gravity.
    D.
    All (a), (b), and (c).

  15. Erosion and pits formation on the impeller of a centrifugal pump may be due to

  16. A.
    cavitation.
    B.
    low speed of impeller.
    C.
    its operation with delivery valve closed for considerable time after starting the pump.
    D.
    off centering of pump with motor.

  17. The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.

  18. A.
    hyperbola
    B.
    parabola
    C.
    semi-circle
    D.
    semi-ellipse

  19. A rotameter works on the principle of __________ pressure drop.

  20. A.
    constant
    B.
    variable
    C.
    both (a) & (b)
    D.
    neither (a) nor (b)