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Chemical Engineering :: Fluid Mechanics

  1. With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity

  2. A.

     Widens

    B.

     Squeezes

    C.

     Does not change

    D.

     Unpredictable from the data


  3. Hydraulic __________ works on the principle of Pascal's law of transmission of fluid pressure.

  4. A.

     Press

    B.

     Turbine

    C.

     Pump

    D.

     Coupling


  5. 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?

  6. A.

     < 0.3

    B.

     > 3

    C.

     50

    D.

     1


  7. The fluid velocity varies as the square of the cylindrical pipe diameter, in case of steady state laminar flow at constant pressure drop, for __________ fluid.

  8. A.

     Newtonion

    B.

     Dilatant

    C.

     Pseudoplastic

    D.

     Non-Newtonion


  9. Enamels and paints are generally __________ fluid.

  10. A.

     Reheopectic

    B.

     Pseudo-plastic

    C.

     Thixotropic

    D.

     Dilatant


  11. In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )

  12. A.

     1/√T

    B.

     1/T

    C.

     √T

    D.

     T


  13. The pressure intensity is the same in all directions at a point in a fluid

  14. A.

     Only when the fluid is frictionless

    B.

     Only when the fluid is at rest having zero velocity

    C.

     When there is no motion of one fluid layer relative to an adjacent layer

    D.

     Regardless of the motion of one fluid layer relative to an adjacent layer


  15. For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is

  16. A.

     More

    B.

     Less

    C.

     Equal

    D.

     Either A or B; depends on the viscosity of the fluid


  17. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.

  18. A.

     Small differential

    B.

     Atmospheric

    C.

     Absolute

    D.

     Gage


  19. Differential manometer measures the

  20. A.

     Atmospheric pressure

    B.

     Sub-atmospheric pressure

    C.

     Pressure difference between two points

    D.

     None of these