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Mechanical Engineering :: Hydraulics and Fluid Mechanics

  1. One horsepower is equal to

  2. A.

     102 watts

    B.

     75 watts

    C.

     550 watts

    D.

     735 watts


  3. Practical fluids

  4. A.

     Are viscous

    B.

     Possess surface tension

    C.

     Are compressible

    D.

     Possess all the above properties


  5. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. The saving in case of a double acting reciprocating pump is

  6. A.

     39.2%

    B.

     48.8%

    C.

     84.8%

    D.

     88.4%


  7. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

  8. A.

     39.2%

    B.

     48.8%

    C.

     84.8%

    D.

     88.4%


  9. For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

  10. A.

     Centrifugal

    B.

     Axial flow

    C.

     Reciprocating

    D.

     Mixed flow


  11. For small discharge at high pressure, following pump is preferred

  12. A.

     Centrifugal

    B.

     Axial flow

    C.

     Mixed flow

    D.

     Reciprocating


  13. Manometric head, in case of a centrifugal pump, is equal to

  14. A.

     Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

    B.

     Work-done per kN of water Losses within the impeller

    C.

     Energy per kN at outlet of impeller Energy per kN at inlet of impeller

    D.

     All of the above


  15. Multistage centrifugal pumps are used to

  16. A.

     Give high discharge

    B.

     Produce high heads

    C.

     Pump viscous fluids

    D.

     All of these


  17. Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

  18. A.

     High initial and maintenance cost

    B.

     Lower discharge

    C.

     Lower speed of operation

    D.

     Necessity of air vessel


  19. General energy equation holds for

  20. A.

     Steady flow

    B.

     Turbulent flow

    C.

     Laminar flow

    D.

     Non-uniform flow