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  • Question
  • The unit power developed by a turbine is (where P = Power developed by the turbine under a head of water (H))


  • Options
  • A. The unit power developed by a turbine is (where P = Power developed by the turbine under a head of w
  • B. The unit power developed by a turbine is (where P = Power developed by the turbine under a head of w
  • C. The unit power developed by a turbine is (where P = Power developed by the turbine under a head of w
  • D. The unit power developed by a turbine is (where P = Power developed by the turbine under a head of w

  • Correct Answer
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  • Hydraulic Machines problems


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    • 1. In a reciprocating pump, air vessels are used to

    • Options
    • A. smoothen the flow
    • B. reduce suction head
    • C. increase delivery head
    • D. reduce acceleration head
    • Discuss
    • 2. 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
    • 3. In a Francis turbine, the pressure at inlet is __________ that at outlet.

    • Options
    • A. less than
    • B. more than
    • Discuss
    • 4. 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
    • 5. 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
    • 6. In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 7. Overall efficiency of a centrifugal pump is the ratio of

    • Options
    • A. energy available at the impeller to the energy supplied to the pump by the prime mover
    • B. actual workdone by the pump to the energy supplied to the pump by the prime mover
    • C. energy supplied to the pump to the energy available at the impeller
    • D. manometric head to the energy supplied by the impeller per kN of water
    • Discuss
    • 8. A hydraulic ram is a device used to

    • Options
    • A. store the energy of water
    • B. increase the pressure of water
    • C. to lift water from deep wells
    • D. to lift small quantity of water to a greater height when a large quantity of water is available at a smaller height
    • Discuss
    • 9. A Kaplan turbine is an axial flow reaction turbine.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 10. In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss


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