Related Questions

The effect of considering friction in steam nozzles for the same pressure ratio leads to
A increase in dryness fraction of exit steam
B decrease in dryness fraction of exit steam
C no change in the quality of exit steam
D decrease or increase of dryness fraction of exit steam depending upon inlet quality
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
A Choked
B Under-damping
C Over-damping
D None of these
The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
A Wetness
B Mass flow rate
C Both A & B
D Neither A nor B
The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is
A 0.555
B 0.578
C 0.5457
D 0.6
The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is
A 0.6
B 0.578
C 0.555
D 0.5457
The effect of friction on the flow of steam through a nozzle is to
A Decrease the mass flow rate and to increase the wetness of steam
B Increase the mass flow rate and to increase the exit temperature
C Decrease the mass flow rate and to decrease the wetness of steam
D Increase the exit temperature without any effect on mass flow rate
The effect of friction in the nozzle __________ dryness fraction of steam.
A Has no effect on
B Decreases
C Increases
D None of these
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
A Remains constant
B Decreases
C Increases
D None of these
The friction present between the steam and the nozzle surfaces reduces the heat drop by
A 10 to 15%
B 15 to 25%
C 25 to 40%
D 40 to 60%
The friction in the nozzle __________ exit velocity of steam.
A Has no effect on
B Decreases
C Increases
D None of these

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