Q. The diagram efficiency is the ratio of

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Q. The Rankine efficiency depends upon total useful heat drop and total isentropic heat drop.

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Q. Blading efficiency is also known as

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Q. The pressure of steam, in reaction turbines, is reduced in the fixed blades as well as in moving blades.

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Q. A single stage impulse turbine with a diameter of 1.2 m runs at 3000 r.p.m. If the blade speed ratio is 0.42, then the inlet velocity of steam will be

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Q. In a De-Laval impulse turbine, the nozzle is kept very close to the blades.

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Q. The flow of steam is super-sonic

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Q. The pressure of steam at throat of a steam nozzle is called critical pressure.

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Q. For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.

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Q. De-Laval turbine is a

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Q. The impulse turbine rotor efficiency will have a maximum value of 0.5 cos² α, where α is the nozzle exit flow angle, if the

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Q. When the cross-section of a nozzle increases continuously from entrance to exit, it is called a

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Q. Rateau turbine is

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Q. The ratio of the work delivered at the turbine shaft to the heat supplied is called overall thermal efficiency of turbine.

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Q. The pressure of steam __________ while flowing through a nozzle.

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Q. The process of maintaining the speed of the turbine constant for various load conditions, is known as

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Q. Reheating of steam in a turbine

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Q. Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

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Q. The density of supersaturated steam is about __________ that of the ordinary saturated vapour at the corresponding pressure.

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Q. In a single stage impulse turbine, the velocity of steam approaching nozzles is negligible.

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