Q. In a Francis turbine runner, the number of blades are generally between

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Q. The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) ) is

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Q. In a centrifugal pump, the water enters the impeller __________ and leaves the vanes axially.

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Q. A Kaplan turbine is an axial flow reaction turbine.

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Q. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit speed of the wheel is

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Q. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is __________ of the jet velocity,

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Q. The specific speed of a hydraulic turbine depends upon

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Q. Dynamic similarity is said to exist between the model and the prototype, if both of them

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Q. The specific speed of a turbine is given by the equation

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Q. A draft tube is used with impulse turbines.

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Q. A hydraulic ram is a device used to

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Q. Overall efficiency of a centrifugal pump is the ratio of

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Q. The function of guide vanes in a reaction turbine is to

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Q. Which of the following statement is correct ?

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Q. 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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Q. The jet ratio is defined as the ratio of the

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Q. Mechanical efficiency of a centrifugal pump is the ratio of

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Q. A reciprocating pump is also called a __________ displacement pump.

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Q. The head available at the inlet of the turbine is known as net or effective head.

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Q. In an axial flow reaction turbine, the water flows __________ to the axis of the wheel.

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