Related Questions

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
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 supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop
A Remains the same
B Increases
C Decreases
D Is unpredictable
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 ratio of the useful heat drop to the isentropic heat drop is called
A Condenser efficiency
B Nozzle efficiency
C Boiler efficiency
D Vacuum efficiency
Heat flux increases with temperature drop beyond the Leiden frost point in the plot of heat flux vs. temperature drop for a boiling liquid, because
A Convection becomes important
B Conduction becomes important
C Radiation becomes important
D Sub-cooled boiling occurs
The ratio of total useful heat drop to the total isentropic heat drop, is called
A Stage efficiency
B Internal efficiency
C Rankine efficiency
D None of these
The effect of considering friction losses in steam nozzle for the same pressure ratio leads to
A increase in exit velocity from the nozzle
B decrease in exit velocity from the nozzle
C no change in exit velocity from the nozzle
D increase or decrease depending upon the exit quality of steam
The friction in the nozzle __________ exit velocity of steam.
A Has no effect on
B Decreases
C Increases
D None of these
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

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