Multi-stage centrifugal pumps are used to

A. give high dischargeB. produce high headsC. pump viscous fluidsD. all of these

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The efficiency of a centrifugal pump will be maximum when the blades are bent backward.

A. YesB. No

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Slip of a reciprocating pump is defined as the

A. ratio of actual discharge to the theoretical dischargeB. sum of actual discharge and the theoretical dischargeC. difference of theoretical discharge and the actual dischargeD. product of theoretical discharge and the actual discharge

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The power produced by the reaction turbine is __ to the head of water.

A. directly proportionalB. inversely proportional

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In a reaction turbine, the draft tube is used

A. to run the turbine fullB. to prevent air to enter the turbineC. to increase the head of water by an amount equal to the height of the runner outlet above the tail…

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Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

A. directly proportional to NB. inversely proportional to NC. directly proportional to N2D. inversely proportional to N2

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Geometric similarity is said to exist between the model and the prototype, if both of them

A. have identical velocitiesB. are equal in size and shapeC. are identical in shape, but differ only in sizeD. have identical forces

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

A. hydraulicB. mechanicalC. overall

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In a Kaplan turbine runner, the number of blades are generally between

A. 2 to 4B. 4 to 8C. 8 to l6D. 16 to 24

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The overshot water wheels are those in which the wheel runs entirely by the __ of water.

A. weightB. impulse

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