Q. Multi-stage centrifugal pumps are used to

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Q. The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is

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Q. Theoretical power required (in watts) to drive a reciprocating pump is (where w = Specific weight of liquid to be pumped in N/m³, Q = Discharge of the pump in m³/s, Hs = Suction head in metres, and Hd = Delivery head in metres)

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Q. In an impulse turbine, the jet of water impinges on the bucket with a low velocity and after flowing over the vanes, leaves with a high velocity.

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Q. The capacity of a hydraulic accumulator is generally specified as the maximum amount of energy stored.

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Q. The maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is

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Q. The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.

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Q. The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as

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Q. Discharge of a centrifugal pump is

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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 power of the wheel is

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Q. The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.

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

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

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Q. A Francis turbine is used when the available head of water is

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Q. The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

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Q. A hydraulic coupling belongs to the category of

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Q. The principle of jet propulsion is used in driving the ships and aeroplanes.

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Q. In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.

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Q. Which of the following pump is preferred for flood control and irrigation applications?

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Q. The efficiency of a Pelton wheel working under constant head __________ with the increase in power.

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