Home / Mechanical Engineering / Hydraulic Machines :: Section 1

Mechanical Engineering :: Hydraulic Machines

  1. Which of the following pump is preferred for flood control and irrigation applications?

  2. A.
    Centrifugal pump
    B.
    Axial flow pump
    C.
    Mixed flow pump
    D.
    Reciprocating pump

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. The efficiency of a Pelton wheel working under constant head __________ with the increase in power.

  4. A.
    remains same
    B.
    increases
    C.
    decreases

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. The discharge of a centrifugal pump working under constant head __________ with the speed.

  6. A.
    increases
    B.
    decreases

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The unit discharge through the turbine is

  8. View Answer

    Workspace

    Discuss Discuss in Forum


  9. Delivery head of water of a centrifugal pump is inversely proportional to diameter of its impeller.

  10. A.
    Yes
    B.
    No

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

  12. A.
    L.A.N
    B.
    2 L.A.N
    C.
    D.

    View Answer

    Workspace

    Discuss Discuss in Forum


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

  14. A.
    Pelton wheel
    B.
    Kaplan turbine
    C.
    Francis turbine
    D.
    none of these

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.

  16. A.
    Yes
    B.
    No

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. The overall efficiency of a reaction turbine is the ratio of

  18. A.
    power produced by the turbine to the energy actually supplied by the turbine
    B.
    actual work available at the turbine to the energy imparted to the wheel
    C.
    workdone on the wheel to the energy (or head of water) actually supplied to the turbine
    D.
    none of the above

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Work done by a turbine __________ upon the weight of water flowing per second.

  20. A.
    depends
    B.
    does not depend

    View Answer

    Workspace

    Discuss Discuss in Forum