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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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 discharge of wheel is

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Q. Delivery head of a centrifugal pump is

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Q. The power developed by a turbine is (where H = Head of water under which the turbine is working)

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Q. If V1 and V2 are the velocities of water at inlet and outlet of the draft tube respectively, then the efficiency of a draft tube is

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Q. A jet of water enters and leaves a fixed curved vane tangentially. The force of jet along perpendicular to the vane is zero.

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Q. In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows.

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Q. A Pelton wheel is

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Q. The discharge through a reaction turbine __________ with the increase in unit speed.

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Q. In a mixed flow reaction turbine, the flow of water is partly radial and partly axial.

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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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