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Mechanical Engineering :: Hydraulics and Fluid Mechanics in ME

  1. The center of gravity of the volume of the liquid displaced by an immersed body is called

  2. A.

     Center of gravity

    B.

     Center of pressure

    C.

     Metacenter

    D.

     Center of buoyancy


  3. The resultant upward pressure of the fluid on an immersed body is called

  4. A.

     Up-thrust

    B.

     Buoyancy

    C.

     Center of pressure

    D.

     All the above are correct


  5. The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the submerged body is called

  6. A.

     Up-thrust

    B.

     Reaction

    C.

     Buoyancy

    D.

     Metacentre


  7. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water?

  8. A.

     10 m/sec

    B.

     25 m/sec

    C.

     2 m/sec

    D.

     50 m/sec


  9. A pitot tube is used to measure the

  10. A.

     Velocity of flow at the required point in a pipe

    B.

     Pressure difference between two points in a pipe

    C.

     Total pressure of liquid flowing in a pipe

    D.

     Discharge through a pipe


  11. The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

  12. A.

     Manometric efficiency

    B.

     Mechanical efficiency

    C.

     Overall efficiency

    D.

     Volumetric efficiency


  13. Which of the following is the unit of kinematic viscosity?

  14. A.

     Pascal

    B.

     Poise

    C.

     Stoke

    D.

     Faraday


  15. The process of diffusion of one liquid into the other through a semi permeable membrane is called

  16. A.

     Viscosity

    B.

     Osmosis

    C.

     Surface tension

    D.

     Cohesion


  17. Which of the following statement is correct?

  18. A.

     In a compressible flow, the volume of the flowing liquid changes during the flow

    B.

     A flow, in which the volume of the flowing liquid does not change, is called incompressible flow

    C.

     When the particles rotate about their own axes while flowing, the flow is said to be rotational flow

    D.

     All of the above


  19. A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

  20. A.

     The pressure on the wall at the liquid level is minimum

    B.

     The pressure on the bottom of the wall is maximum

    C.

     The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum

    D.

     The pressure on the bottom of the wall is zero