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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The meatcentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is

  2. A.

     4.1 sec

    B.

     5.2 sec

    C.

     10.4 sec

    D.

     14.1 sec

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  3. When a cylindrical vessel of radius (r) containing liquid is revolved about its vertical axis ω rad/s, then depth of parabola which the liquid assumes is

  4. A.

     ω.r/2g

    B.

     ω².r²/2g

    C.

     ω.r/4g

    D.

     ω².r²/4g

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  5. The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced.

  6. A.

     Equal to

    B.

     Less than

    C.

     More than

    D.

     None of these

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  7. The body will float if the force of buoyancy is __________ the weight of the liquid displaced.

  8. A.

     Equal to

    B.

     Less than

    C.

     More than

    D.

     None of these

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  9. The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

  10. A.

     wA

    B.

     wx

    C.

     wAx

    D.

     wAx/sinθ

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  11. The property of a liquid which offers resistance to the movement of one layer of liquid over another adjacent layer of liquid, is called

  12. A.

     Surface tension

    B.

     Compressibility

    C.

     Capillarity

    D.

     Viscosity

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  13. Liquids

  14. A.

     Cannot be compressed

    B.

     Occupy definite volume

    C.

     Are not affected by change in pressure and temperature

    D.

     None of the above

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  15. The discharge through a channel of rectangular section will be maximum, if

  16. A.

     Its depth is twice the breadth

    B.

     Its breadth is twice the depth

    C.

     Its depth is thrice the breadth

    D.

     Its breadth is thrice the depth

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  17. A balloon lifting in air follows the following principle

  18. A.

     Law of gravitation

    B.

     Archimedes principle

    C.

     Principle of buoyancy

    D.

     All of the above

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  19. A weir, generally, used as a spillway of a dam is

  20. A.

     Narrow crested weir

    B.

     Broad crested weir

    C.

     Ogee weir

    D.

     Submerged weir

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