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Chemical Engineering :: Fluid Mechanics

  1. The pump impeller and the turbine runner in a hydraulic torque converter

  2. A.

     Have the same diameter

    B.

     Have different diameters

    C.

     Are directly coupled

    D.

     None of these


  3. Rubber latex is an example of __________ fluid.

  4. A.

     Dilatent

    B.

     Newtonion

    C.

     Pseudoplastic

    D.

     Bingham plastic


  5. Paper pulp is an example of __________ fluid.

  6. A.

     Dilatant

    B.

     Bingham plastic

    C.

     Newtonion

    D.

     Pseudoplastic


  7. Forces acting on a particle settling in fluid are __________ forces.

  8. A.

     Gravitational & buoyant

    B.

     Centrifugal & drag

    C.

     Gravitational or centrifugal buoyant drag

    D.

     External, drag & viscous


  9. Pick out the wrong statement.

  10. A.

     In a static mass of liquid, the pressure at a point is the same for all liquids

    B.

     Pressure decreases exponentially with elevation in an isothermal atmosphere

    C.

     Atmospheric pressure = absolute pressure-gage pressure

    D.

     As per Pascal's law, the pressure at a point in a static or uniformly moving fluid is equal in all directions


  11. Existence of boundary layer in fluid flow is because of the

  12. A.

     Surface tension

    B.

     Fluid density

    C.

     Fluid viscosity

    D.

     Gravity forces


  13. Acceleration head in a reciprocating pump

  14. A.

     Increases the work done during delivery stroke

    B.

     Decreases the work done during suction stroke

    C.

     Does not change the work requirement of the pump

    D.

     Increases the work done during suction stroke


  15. The continuity equation in ideal fluid flow states that

  16. A.

     Net rate of inflow into any small volume must be zero

    B.

     Energy is not constant along a streamline

    C.

     Energy is constant along a streamline

    D.

     There exists a velocity potential


  17. Baffles in mixing tanks are provided to

  18. A.

     Reduce swirling and vortex formation

    B.

     Increase the structural strength of the tank

    C.

     Aid in rotational flow

    D.

     None of these


  19. Dean number is concerned with the

  20. A.

     Fluid-particle interaction

    B.

     Fluid flow through helical pipes

    C.

     Power consumption in agitated vessels

    D.

     Psychrometry