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Chemical Engineering :: Fluid Mechanics

  1. The continuity equation of fluid mechanics utilises the principle of conservation of

  2. A.
    momentum
    B.
    mass
    C.
    energy
    D.
    both (b) & (c)

  3. Stoke's law is valid, when the particle Reynolds number is

  4. A.
    < 1
    B.
    > 1
    C.
    < 5
    D.
    none of these

  5. Which of the following is not a dimension-less parameter ?

  6. A.
    Pressure-co-efficient
    B.
    Froude number
    C.
    Kinematic viscosity
    D.
    Weber number

  7. In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?

  8. A.
    Flow of liquid upward in a vertical pipe.
    B.
    Flow through a converging section.
    C.
    Flow of air downward in a pipe.
    D.
    Impossible in a constant cross-section conduit.

  9. The percentage slip in a reciprocating pump set is given by the % of (where, Q1 = actual discharge Q2 = theoretical discharge)

  10. A.
    Q1/Q2
    B.
    Q2/Q1
    C.
    D.

  11. The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.

  12. A.
    inlet tip of a blade curves in a direction opposite to that
    B.
    outlet tip of a blade curves in a direction opposite to that
    C.
    inlet tip of a blade is towards the direction
    D.
    outlet tip of a blade is towards the direction

  13. For the same terminal conditions and fitting size, the least friction loss is incurred in a/an

  14. A.
    T-joint
    B.
    union
    C.
    45° elbow
    D.
    90°bend

  15. A floating/submerged body is always stable, if its centre of gravity

  16. A.
    lies above its centre of buoyancy.
    B.
    and centre of buoyancy coincide.
    C.
    lies below its centre of buoyancy.
    D.
    lies above its meta centre.

  17. The co-efficient of discharge of an orificemeter is a function of

  18. A.
    Reynolds number at the orifice.
    B.
    ratio of orifice dia to pipe dia.
    C.
    both (a) and (b).
    D.
    none of the above parameters, and has a constant value of 0.61.

  19. Critical velocity in a pipe flow

  20. A.
    increases as fluid viscosity increases.
    B.
    increases as pipe diameter increases.
    C.
    independent of fluid density.
    D.
    none of these.