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Chemical Engineering :: Fluid Mechanics

  1. A mono pump is a __________ pump.

  2. A.

     Centrifugal

    B.

     Piston

    C.

     Positive acting rotary

    D.

     A group of vacuum


  3. For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by

  4. A.

     ∂u/∂x = 0

    B.

     ∂(ρu)/∂x = 0

    C.

     ∂u/∂x = - ∂ρ/∂t

    D.

     ∂ρ/∂t = 0


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

  6. A.

     Elevation

    B.

     Pressure

    C.

     Both A and B

    D.

     Neither A nor B


  7. Diaphragm valves are used for handling __________ fluids.

  8. A.

     Corrosive

    B.

     Viscous

    C.

     Non-Newtonion

    D.

     Solid suspended


  9. Pick out the wrong statement:

  10. A.

     Greater is the kinematic viscosity of the liquid, greater is the thickness of the boundary layer

    B.

     Blowers develop a maximum pressure of 2 atmospheres

    C.

     Friction losses in pipe fittings are generally expressed in terms of velocity heads

    D.

     Fanning friction factor in case of turbulent flow of liquids in pipe depends upon relative roughness & Reynolds number


  11. The velocity for subsonic flow in a pipeline

  12. A.

     Increases in the downstream direction

    B.

     Is constant

    C.

     Decreases in the downstream direction

    D.

     Is independent of the area of flow


  13. What is the value of co-efficient of discharge for square edged circular orifice (for β = 0.3 to 0.5)?

  14. A.

     0.61 - 0.63

    B.

     0.5 - 0.75

    C.

     0.75 - 0.90

    D.

     0.35 - 0.55


  15. The pump used for irrigation purposes is generally designed for

  16. A.

     Large capacity & high head

    B.

     Large capacity & low head

    C.

     Small capacity & high head

    D.

     Small capacity & low head


  17. Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss?

  18. A.

     Flow nozzle

    B.

     Venturimeter

    C.

     Rotameter

    D.

     Orificemeter


  19. Open channel liquid flow is most conveniently measured by a

  20. A.

     Hot wire anemometer

    B.

     Notch

    C.

     Rotameter

    D.

     Segmental orifice