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  • Question

  • The specific speed of a centrifugal pump may be defined as the speed of an imaginary pump, identical with the given pump, which will discharge one litre of water, while it is being raised through a head of one metre.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Hydraulic Machines problems

    Search Results

    • 1. Which of the following pump is sucessfully used for lifting water to the boilers?

    • Options
    • A. Centrifugal pump
    • B. Reciprocating pump
    • C. Jet pump
    • D. Air-lift pump
      • Discuss
    • 2. Which of the following is not an impulse turbine?

    • Options
    • A. Girad turbine
    • B. Turgo turbine
    • C. Pelton wheel
    • D. Kaplan turbine
      • Discuss
    • 3. In a centrifugal pump, the regulating valve is provided on the

    • Options
    • A. casing
    • B. delivery pipe
    • C. suction pipe
    • D. impeller
      • Discuss
    • 4. 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
    • 5. 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
    • 6. In a reaction turbine, the water enters the wheel under pressure and flows over the vanes.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 7. A hydraulic press is a device used

    • Options
    • A. to store pressure energy which may be supplied to a machine later on
    • B. to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure
    • C. to lift larger load by the application of a comparatively much smaller force
    • D. all of the above
      • Discuss
    • 8. Slip of a reciprocating pump is negative, when

    • Options
    • A. suction pipe is short and pump is running at low speeds
    • B. delivery pipe is long and pump is running at high speeds
    • C. suction pipe is short and delivery pipe is long and the pump is running at low speeds
    • D. suction pipe is long and delivery pipe is short and the pump is running at high speeds
      • Discuss
    • 9. Manometric head is the actual head of water against which a centrifugal pump has to work.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. 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

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

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