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Mechanical Engineering :: Hydraulics and Fluid Mechanics

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

  2. A.

     Straight line

    B.

     Parabolic curve

    C.

     Hyperbolic curve

    D.

     Elliptical

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  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

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

  6. A.

     Adhesion

    B.

     Cohesion

    C.

     Viscosity

    D.

     Compressibility

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  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

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  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

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  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

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  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 %

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  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

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  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

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  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

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