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  • Question

  • In an impulse turbine, the pressure of water both at entering and leaving the vanes, is atmospheric.


  • Options
  • A. Agree
  • B. Disagree

  • Correct Answer
  • Agree 

    • Hydraulic Machines problems

    Search Results

    • 1. The jet ratio is defined as the ratio of the

    • Options
    • A. diameter of jet to the diameter of Pelton wheel
    • B. velocity of jet to the velocity of Pelton wheel
    • C. diameter of Pelton wheel to the diameter of jet
    • D. velocity of Pelton wheel to the velocity of jet
      • Discuss
    • 2. If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 3. A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used?

    • Options
    • A. Pelton wheel with one nozzle
    • B. Pelton wheel with two or more nozzles
    • C. Kaplan turbine
    • D. Francis turbine
      • Discuss
    • 4. The undershot water wheels are those in which

    • Options
    • A. the wheel runs entirely by the weight of water
    • B. the wheel runs entirely by the impulse of water
    • C. the wheel runs partly by the weight of water and partly by the impulse of water
    • D. none of the above
      • Discuss
    • 5. The number of buckets on the periphery of a Pelton wheel is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 6. The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. In an outward 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
    • 8. A jet of water enters and leaves a fixed curved vane tangentially. The force of the jet along normal to the vane is (where ? and ? = Inlet and outlet angles of the jet respectively)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 9. Which of the following pump is suitable for small discharge and high heads?

    • Options
    • A. Centrifugal pump
    • B. Axial flow pump
    • C. Mixed flow pump
    • D. Reciprocating pump
      • Discuss
    • 10. In a centrifugal pump, the regulating valve is provided on the

    • Options
    • A. casing
    • B. delivery pipe
    • C. suction pipe
    • D. impeller
      • Discuss

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