The overall efficiency of a reaction turbine is the ratio of
The breast water wheels are those in which the wheel runs partly by the weight of water and partly by the impulse of water.
The power produced by the reaction turbine is __________ to the head of water.
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)
A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the
The principle of jet propulsion is used in driving the ships and aeroplanes.
The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.
Work done by a turbine __________ upon the weight of water flowing per second.
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
When the speed of the pump increases, its net positive suction head (NPSH) requirement decreases.
In the casing of a centrifugal pump, the kinetic energy of the water is converted into pressure energy before the water leaves the casing.
Geometric similarity is said to exist between the model and the prototype, if both of them
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is
Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.
The mechanical efficiency of an impulse turbine is
The overshot water wheels are those in which the wheel runs entirely by the __________ of water.
In a Kaplan turbine runner, the number of blades are generally between
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by
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