Mechanical Engineering :: Hydraulic Machines
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The function of guide vanes in a reaction turbine is to
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Which of the following statement is correct ?
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If the ratio of corresponding velocities at corresponding points are equal, then the model and the prototype are said to have dynamic similarity.
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The jet ratio is defined as the ratio of the
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Mechanical efficiency of a centrifugal pump is the ratio of
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The cavitation in a hydraulic machine is mainly due to
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In a centrifugal pump, the regulating valve is provided on the
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A jet of water enters and leaves a fixed curved vane tangentially. The force of the jet along normal to the vane is (where α and β = Inlet and outlet angles of the jet respectively)
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A.
In an impulse turbine, the water impinges on the buckets with pressure energy.
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B.
In a reaction turbine, the water glides over the moving vanes with kinetic energy.
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C.
In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.
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D.
In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes.
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A.
energy available at the impeller to the energy supplied to the pump by the prime mover
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B.
actual workdone by the pump to the energy supplied to the pump by the prime mover
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C.
energy supplied to the pump to the energy available at the impeller
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D.
manometric head to the energy supplied by the impeller per kN of water
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