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Mechanical Engineering :: Hydraulic Machines

  1. A reciprocating pump is also called a __________ displacement pump.

  2. A.
    positive
    B.
    negative

  3. The head available at the inlet of the turbine is known as net or effective head.

  4. A.
    Correct
    B.
    Incorrect

  5. In an axial flow reaction turbine, the water flows __________ to the axis of the wheel.

  6. A.
    parallel
    B.
    perpendicular

  7. The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base.

  8. A.
    Agree
    B.
    Disagree

  9. A double overhung Pelton wheel has

  10. A.
    two jets
    B.
    two runners
    C.
    four jets
    D.
    four runners

  11. The specific speed (Ns) of a centrifugal pump is given by


  12. Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

  13. A.
    Hydraulic ram
    B.
    Hydraulic intensifier
    C.
    Hydraulic torque converter
    D.
    Hydraulic accumulator

  14. The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is


  15. In a reaction turbine, the water enters the wheel under pressure and flows over the vanes.

  16. A.
    Correct
    B.
    Incorrect

  17. If the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have

  18. A.
    geometric similarity
    B.
    kinematic similarity
    C.
    dynamic similarity
    D.
    none of these