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Steam Nozzles and Turbines
The friction in the nozzle __________ exit velocity of steam.
has no effect on
decreases
increases
Correct Answer:
decreases
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Steam Nozzles and Turbines
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
The pressure of steam __________ while flowing through a nozzle.
In a single stage impulse turbine, the velocity of steam approaching nozzles is negligible.
When the cross-section of a nozzle first increases from its entrance to throat, and then decreases from its throat to exit, it is not a convergent-divergent nozzle.
A stage, in reaction turbine, is represented by
A nozzle is said to be a divergent nozzle
The ratio of the isentropic heat drop to the heat supplied, is called
Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?
For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.
The effect of friction on the flow of steam through a nozzle is to
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