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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. The shear stress-strain graph for a Newtonian fluid is a

  2. A.

     Straight line

    B.

     Parabolic curve

    C.

     Hyperbolic curve

    D.

     Elliptical


  3. The velocity at which the laminar flow stops, is known as

  4. A.

     Velocity of approach

    B.

     Lower critical velocity

    C.

     Higher critical velocity

    D.

     None of these


  5. Property of a fluid by which its own molecules are attracted is called

  6. A.

     Adhesion

    B.

     Cohesion

    C.

     Viscosity

    D.

     Compressibility


  7. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as

  8. A.

     Real fluid

    B.

     Ideal fluid

    C.

     Newtonian fluid

    D.

     Non-Newtonian fluid


  9. The property of a fluid which enables it to resist tensile stress is known as

  10. A.

     Compressibility

    B.

     Surface tension

    C.

     Cohesion

    D.

     Adhesion


  11. The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

  12. A.

     Plus

    B.

     Minus

    C.

     Divide

    D.

     None of these


  13. An error of 1% in measuring head over the apex of the notch (H) will produce an error of _________ in discharge over a triangular notch.

  14. A.

     1 %

    B.

     1.5 %

    C.

     2 %

    D.

     2.5 %


  15. Axial flow pump is started with its delivery valve

  16. A.

     Kept fully closed

    B.

     Kept fully open

    C.

     Irrespective of any position

    D.

     Kept 50% open


  17. Centrifugal pump is started with its delivery valve

  18. A.

     Kept fully closed

    B.

     Kept fully open

    C.

     Irrespective of any position

    D.

     Kept 50% open


  19. In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 'θ'. Sensitivity of inclined tube to sensitivity of U-tube is equal to

  20. A.

     Sinθ

    B.

     1/Sinθ

    C.

     Cos θ

    D.

     1/Cosθ