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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. A flow through a long pipe at constant rate is called

  2. A.

     Steady uniform flow

    B.

     Steady non-uniform flow

    C.

     Unsteady uniform flow

    D.

     Unsteady non-uniform flow


  3. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.

  4. A.

     Coincides with

    B.

     Lies below

    C.

     Lies above

    D.

     None of these


  5. Head developed by a centrifugal pump is

  6. A.

     Proportional to diameter of impeller

    B.

     Proportional to speed of impeller

    C.

     Proportional to diameter and speed of impeller

    D.

     None of the above


  7. Delivery head of a centrifugal pump is

  8. A.

     Directly proportional to N

    B.

     Inversely proportional to N

    C.

     Directly proportional to N²

    D.

     Inversely proportional to N²


  9. Discharge of a centrifugal pump is

  10. A.

     Directly proportional to diameter of its impeller

    B.

     Inversely proportional to diameter of its impeller

    C.

     Directly proportional to (diameter)² of its impeller

    D.

     Inversely proportional to (diameter)² of its impeller


  11. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as

  12. A.

     Meta center

    B.

     Center of pressure

    C.

     Center of buoyancy

    D.

     Center of gravity


  13. The flow in a pipe or channel is said to be uniform when

  14. 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


  15. Euler's number is the ratio of __________ force to pressure force.

  16. A.

     Inertia

    B.

     Gravity

    C.

     Viscous

    D.

     None of these


  17. The property of fluid by virtue of which it offers resistance to shear is called

  18. A.

     Surface tension

    B.

     Adhesion

    C.

     Adhesion

    D.

     Viscosity


  19. A hydraulic coupling belongs to the category of

  20. A.

     Power absorbing machines

    B.

     Power developing machines

    C.

     Energy transfer machines

    D.

     Energy generating machines