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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The power transmitted through the pipe is maximum when the head lost due to friction is equal to

  2. A.

     One-fourth of the total supply head

    B.

     One-third of the total supply head

    C.

     One-half of the total supply head

    D.

     Two-third of the total supply head


  3. The flow which neglects changes in a transverse direction is known as

  4. A.

     One dimensional flow

    B.

     Uniform flow

    C.

     Steady flow

    D.

     Turbulent flow


  5. If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

  6. A.

     H = Hg/hf

    B.

     H = Hg × hf

    C.

     H = Hg + hf

    D.

     H = Hg - hf


  7. A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

  8. A.

     Incompressible

    B.

     Compressible

    C.

     Viscous

    D.

     None of these


  9. Coefficient of velocity is defined as the ratio of

  10. A.

     Actual velocity of jet at vena contracta to the theoretical velocity

    B.

     Area of jet at vena contracta to the area of orifice

    C.

     Actual discharge through an orifice to the theoretical discharge

    D.

     None of the above


  11. For measuring flow by a Venturimeter, if should be installed in

  12. A.

     Vertical line

    B.

     Horizontal line

    C.

     Inclined line with flow downward

    D.

     In any direction and in any location


  13. The maximum discharge over a broad crested weir is

  14. A.

     0.384 Cd × L × H1/2

    B.

     0.384 Cd × L × H3/2

    C.

     1.71 Cd × L × H1/2

    D.

     1.71 Cd × L × H3/2


  15. In a centrifugal pump, the liquid enters the pump

  16. A.

     At the top

    B.

     At the bottom

    C.

     At the canter

    D.

     From sides


  17. The ratio of the inertia force to the __________ is called Euler's number.

  18. A.

     Pressure force

    B.

     Elastic force

    C.

     Surface tension force

    D.

     Viscous force


  19. Bulk modulus of a fluid is the ratio of

  20. A.

     Shear stress to shear strain

    B.

     Increase in volume to the viscosity of fluid

    C.

     Increase in pressure to the volumetric strain

    D.

     Critical velocity to the viscosity of fluid