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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The volume of a fluid __________ as the pressure increases.

  2. A.

     Remains same

    B.

     Decreases

    C.

     Increases

    D.

     None of these


  3. Bulk modulus of a fluid __________ as the pressure increases.

  4. A.

     Remain same

    B.

     Decreases

    C.

     Increases

    D.

     None of these


  5. The siphon will work satisfactorily, if the minimum pressure in the pipe is __________ vapour pressure of liquid.

  6. A.

     Equal to

    B.

     Less than

    C.

     More than

    D.

     None of these


  7. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called

  8. A.

     Gauge pressure

    B.

     Absolute pressure

    C.

     Positive gauge pressure

    D.

     Vacuum pressure


  9. Working principle of dead weight pressure gauge tester is based on

  10. A.

     Pascal's law

    B.

     Dalton's law of partial pressure

    C.

     Newton's law of viscosity

    D.

     Avogadro's hypothesis


  11. The liquid used in manometers should have

  12. A.

     Low density

    B.

     High density

    C.

     Low surface tension

    D.

     High surface tension


  13. The stress-strain relation of the Newtonian fluid is

  14. A.

     Linear

    B.

     Parabolic

    C.

     Hyperbolic

    D.

     Inverse type


  15. For pipes, laminar flow occurs when Reynolds number is

  16. A.

     Less than 2000

    B.

     Between 2000 and 4000

    C.

     More than 4000

    D.

     Less than 4000


  17. For pipes, turbulent flow occurs when Reynolds number is

  18. A.

     Less than 2000

    B.

     Between 2000 and 4000

    C.

     More than 4000

    D.

     Less than 4000


  19. The velocity corresponding to Reynold number of 2800, is called

  20. A.

     Sub-sonic velocity

    B.

     Super-sonic velocity

    C.

     Lower critical velocity

    D.

     Higher critical velocity