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  • Question

  • The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.


  • Options
  • A. hydraulic
  • B. mechanical
  • C. overall

  • Correct Answer
  • mechanical 

    • Hydraulic Machines problems

    Search Results

    • 1. The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. Multi-stage centrifugal pumps are used to

    • Options
    • A. give high discharge
    • B. produce high heads
    • C. pump viscous fluids
    • D. all of these
      • Discuss
    • 3. In a reciprocating pump, air vessels are fitted to the suction pipe and delivery pipe close to the cylinder of the pump.

    • Options
    • A. True
    • B. False
      • Discuss
    • 4. The capacity of a hydraulic accumulator is generally specified as the maximum amount of energy stored.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. In a reaction turbine, the draft tube is used

    • Options
    • A. to run the turbine full
    • B. to prevent air to enter the turbine
    • C. to increase the head of water by an amount equal to the height of the runner outlet above the tail race
    • D. to transport water to downstream
      • Discuss
    • 6. A hydraulic coupling belongs to the category of

    • Options
    • A. power absorbing machines
    • B. power developing machines
    • C. energy transfer machines
    • D. energy generating machines
      • Discuss
    • 7. The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle ? with the jet is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 8. In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 9. A Francis turbine is used when the available head of water is

    • Options
    • A. 0 to 25 m
    • B. 25 m to 250 m
    • C. above 250 m
    • D. none of these
      • Discuss
    • 10. A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss

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