In a mixed flow centrifugal pump, the flow through the impeller is a combination

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Question
In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.
Options
A. Correct
B. Incorrect

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2. 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

3. 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

6. 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

7. 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

8. 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

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