Q. The hydraulic efficiency of a reaction turbine, is the ratio of

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Q. In order to avoid cavitation in centrifugal pumps

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Q. A hydraulic intensifier is a device used to increase the intensity of pressure of water by means of energy available from a large quantity of water at a low pressure.

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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.The saving in case of a double acting reciprocating pump is

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Q. In a reciprocating pump, air vessels are used to

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Q. In a Francis turbine, the pressure at inlet is __________ that at outlet.

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Q. If the ratio's of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.

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Q. A Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is

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Q. The impeller of a centrifugal pump may have

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

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Q. Power required (in watts) to drive a centrifugal pump is (where Hm = Manometric head in metres, w = Specific weight in N/m³, Q = Discharge of the pump in m³/s, and ηo = Overall efficiency of the pump)

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Q. A reciprocating pump is suitable for less discharge and higher heads.

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Q. The flow ratio of Francis turbine is defined as the ratio of the

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

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Q. An impulse turbine is used for

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Q. The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship, will be maximum when the relative velocity of the jet and ship is equal to twice the velocity of the ship.

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Q. The cavitation in reaction turbines is avoided, to a great extent by

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Q. Which type of the pump is different from others in the same group?

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Q. Power required to drive a centrifugal pump is __________ proportional to N3.

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Q. The force exerted (in newton) by a jetof water impinging normally on a fixed plate is (where w = Specific weight of water in N/m³, a = Cross-sectional area of jet in m², and V = Velocity of jet in m/s)

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