Exercise: Steam Nozzles And Turbines

Questions for: Steam Nozzles And Turbines

The friction in the nozzle __________ exit velocity of steam.
A:
has no effect on
B:
decreases
C:
increases
D:
Answer: B
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The nozzle efficiency is the ratio of
A:
workdone on the blades to the energy supplied to the blades
B:
workdone on the blades per kg of steam to the total energy supplied per stage per kg of steam
C:
energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam
D:
none of the above
Answer: C
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In order to reduce the rotor speed of an impulse turbine, the method employed is
A:
velocity compounding
B:
pressure compounding
C:
pressure-velocity compounding
D:
all of these
Answer: D
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The pressure of steam, in reaction turbines, is reduced in the fixed blades as well as in moving blades.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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Blading efficiency is also known as
A:
stage efficiency
B:
diagram efficiency
C:
nozzle efficiency
D:
none of these
Answer: B
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