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  • Question
  • Dynamic 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. none of the above

  • Correct Answer
  • none of the above 


  • Hydraulic Machines problems


    Search Results


    • 1. The cavitation in reaction turbines is avoided, to a great extent by

    • Options
    • A. installing the turbine below the tail race level
    • B. using stainless steel runner of the turbine
    • C. providing highly polished blades to the runner
    • D. all of the above
    • Discuss
    • 2. 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
    • 3. A Kaplan turbine is an axial flow reaction turbine.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 4. 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
    • 5. 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
    • 6. If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

    • Options
    • A. geometric similarity
    • B. kinematic similarity
    • C. dynamic similarity
    • D. none of these
    • Discuss
    • 7. If the Francis turbine is run below 50 percent head for a long period, it will not only lose its efficiency but also the cavitation danger will become more serious.

    • Options
    • A. Agree
    • B. Disagree
    • Discuss
    • 8. If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

    • Options
    • A.
    • B.
    • C.
    • D.
    • Discuss
    • 9. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is __________ of the jet velocity,

    • Options
    • A. one-fourth
    • B. one-half
    • C. three-fourth
    • D. double
    • Discuss
    • 10. A hydraulic intensifier is a device used to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure.

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


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