Q. The speed ratio in case of Francis turbine varies from

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Q. The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

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Q. The action of a centrifugal pump is that of a reversed reaction turbine.

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Q. For 450 m head of water, __________ shallbeused.

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Q. Which of the following statement is correct ?

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Q. The width of the bucket for a Pelton wheel is generally __________ the diameter of jet.

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Q. A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is __________ of the jet velocity

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Q. Which of the following is not a reaction turbine?

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Q. Which of the following pump is successfully used for lifting water to the turbines?

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Q. The power of a centrifugal pump working under constant head and discharge increases with the speed.

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Q. A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

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Q. If the net positive suction head (NPSH) requirement for the pump is not satisfied, then

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Q. The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

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Q. The cavitation in a hydraulic machine

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Q. The runaway speed of a hydraulic turbine is the speed

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Q. The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

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Q. The specific speed of a centrifugal pump may be defined as the speed of an imaginary pump, identical with the given pump, which will discharge one litre of water, while it is being raised through a head of one metre.

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Q. The gross or total head of the turbine is the __________ of the water levels at the head race and tail race.

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Q. Which of the following pump is suitable for small discharge and high heads?

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Q. A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?

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