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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. The buoyancy depends upon the

  2. A.

     Weight of the liquid displaced

    B.

     Pressure with which the liquid is displaced

    C.

     Viscosity of the liquid

    D.

     Compressibility of the liquid


  3. The magnitude of water hammer depends upon the

  4. A.

     Elastic properties of the pipe material

    B.

     Elastic properties of the liquid flowing through the pipe

    C.

     Speed at which the valve is closed

    D.

     All of the above


  5. The width of the bucket for a Pelton wheel is generally ________ the diameter of jet.

  6. A.

     Double

    B.

     Three times

    C.

     Four times

    D.

     Five times


  7. The depth of the bucket for a Pelton wheel is generally _________ the diameter of jet.

  8. A.

     Equal to

    B.

     1.2 times

    C.

     1.8 times

    D.

     Double


  9. The speed of sound in a ideal gas varies directly as it’s

  10. A.

     Absolute temperature

    B.

     Temperature

    C.

     Density

    D.

     Modulus of elasticity


  11. Meta-centric height is given as the distance between

  12. A.

     The center of gravity of the body and the metacenter

    B.

     The center of gravity of the body and the center of buoyancy

    C.

     The center of gravity of the body and the center of pressure

    D.

     Center of buoyancy and metacenter


  13. When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

  14. A.

     Steady flow

    B.

     Turbulent flow

    C.

     Vortex flow

    D.

     Uniform flow


  15. Non uniform flow occurs when

  16. A.

     The direction and magnitude of the velocity at all points are identical

    B.

     The velocity of successive fluid particles, at any point, is the same at successive periods of time

    C.

     Velocity, depth, pressure, etc. change from point to point in the fluid flow

    D.

     The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane


  17. Steady flow occurs when

  18. A.

     The direction and magnitude of the velocity at all points are identical

    B.

     The velocity of successive fluid particles, at any point, is the same at successive periods of time

    C.

     The magnitude and direction of the velocity do not change from point to point in the fluid

    D.

     The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane


  19. True one-dimensional flow occurs when

  20. A.

     The direction and magnitude of the velocity at all points are identical

    B.

     The velocity of successive fluid particles, at any point, is the same at successive periods of time

    C.

     The magnitude and direction of the velocity do not change from point to point in the fluid

    D.

     The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane