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  • Question
  • The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.


  • Options
  • A. Yes
  • B. No

  • Correct Answer
  • Yes 


  • Hydraulic Machines problems


    Search Results


    • 1. A reciprocating pump is suitable for less discharge and higher heads.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. In order to avoid cavitation in centrifugal pumps

    • Options
    • A. the suction pressure should be high
    • B. the delivery pressure should be high
    • C. the suction pressure should be low
    • D. the delivery pressure should be low
    • Discuss
    • 3. Kinematic similarity is said to exist between the model and the prototype, if both of them

    • Options
    • A. have identical velocities
    • B. are equal in size and shape
    • C. are identical in shape, but differ only in size
    • D. have identical forces
    • Discuss
    • 4. The impeller of a centrifugal pump may have

    • Options
    • A. volute casing
    • B. volute casing with guide blades
    • C. vortex casing
    • D. any one of these
    • Discuss
    • 5. In a centrifugal pump, the water enters the impeller __________ and leaves the vanes axially.

    • Options
    • A. axially
    • B. radially
    • Discuss
    • 6. In an inward flow reaction turbine

    • Options
    • A. the water flows parallel to the axis of the wheel
    • B. the water enters at the centre of the wheel and then flows towards the outer periphery of the wheel
    • C. the water enters the wheel at the outer periphery and then flows towards the centre of the wheel
    • D. the flow of water is partly radial and partly axial
    • Discuss
    • 7. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit discharge of wheel is

    • Options
    • A. 0.25 m3/s
    • B. 0.5 m3/s
    • C. 1.5 m3/s
    • D. 2.5 m3/s
    • Discuss
    • 8. 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

    • Options
    • A. 39.2%
    • B. 48, 8%
    • C. 84.8%
    • D. 88.4%
    • Discuss
    • 9. In a Francis turbine, the pressure at inlet is __________ that at outlet.

    • Options
    • A. less than
    • B. more than
    • Discuss
    • 10. Which type of the pump is different from others in the same group?

    • Options
    • A. Screw pump
    • B. Gear pump
    • C. Cam and piston pump
    • D. Plunger pump
    • Discuss


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