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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Q. A steam nozzle converts

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Q. The maximum discharge of steam through a convergent-divergent nozzle depends upon

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Q. In order to reduce the rotor speed of an impulse turbine, the method employed is

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Q. The nozzle efficiency is the ratio of

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Q. The friction in the nozzle __________ exit velocity of steam.

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Q. In a reaction turbine

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Q. A stage, in reaction turbine, is represented by

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Q. A single stage turbine is not used because it requires large reduction gearing due to very high rotational speed.

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Q. In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is

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Q. A nozzle is said to be a convergent-divergent nozzle, when the cross-section of a nozzle first decreases from its entrance to throat and then increases from its throat to exit.

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