Q. A Pelton wheel with one nozzle is preferred for a specific speed between 35 to 60 r.p.m.

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Q. Which of the following pump is generally used to pump highly viscous fluid?

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Q. The overall efficiency of an impulse turbine is the ratio of the actual power produced by the turbine to the energy actually supplied by the turbine.

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Q. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is

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Q. 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.

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Q. The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

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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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