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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Q. Curtis turbine is a

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Q. The velocity of steam at throat of the nozzle is __________ the velocity of sound.

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Q. The critical pressure ratio for initially dry saturated steam is

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Q. The discharge through a nozzle is maximum for a certain value of exit pressure. This pressure is known as critical pressure.

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Q. When the nozzle operates with the maximum mass flow, the nozzle is said to be

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Q. In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,

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Q. The ratio of the energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam is called mechanical efficiency.

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