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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than

  2. A.

     2.4 m above the hydraulic gradient

    B.

     6.4 m above the hydraulic gradient

    C.

     10.0 m above the hydraulic gradient

    D.

     5.0 above the hydraulic gradient


  3. If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

  4. A.

     Neutral equilibrium

    B.

     Stable equilibrium

    C.

     Unstable equilibrium

    D.

     None of these


  5. When a body is placed over a liquid, it will float if

  6. A.

     Gravitational force is equal to the up-thrust of the liquid

    B.

     Gravitational force is less than the up-thrust of the liquid

    C.

     Gravitational force is more than the up-thrust of the liquid

    D.

     None of the above


  7. The property by virtue of which a liquid opposes relative motion between its different layers is called

  8. A.

     Surface tension

    B.

     Coefficient of viscosity

    C.

     Viscosity

    D.

     Osmosis


  9. The product of mass and acceleration of flowing liquid is called

  10. A.

     Inertia force

    B.

     Viscous force

    C.

     Gravity force

    D.

     Pressure force


  11. Which of the following turbine is preferred for 0 to 25 m head of water?

  12. A.

     Pelton wheel

    B.

     Kaplan turbine

    C.

     Francis turbine

    D.

     None of these


  13. The force present in a moving liquid is

  14. A.

     Inertia force

    B.

     Viscous force

    C.

     Gravity force

    D.

     All of these


  15. The flow in a pipe or channel is said to be non-uniform when

  16. A.

     The liquid particles at all sections have the same velocities

    B.

     The liquid particles at different sections have different velocities

    C.

     The quantity of liquid flowing per second is constant

    D.

     Each liquid particle has a definite path


  17. The discharge of a depressed nappe is 6 to 7 percent __________ that of a free nappe.

  18. A.

     Less than

    B.

     More than

    C.

     Equal to

    D.

     None of these


  19. Which of the following instrument can be used for measuring speed of an aeroplane?

  20. A.

     Venturimeter

    B.

     Orifice plate

    C.

     Pitot tube

    D.

     Rotameter