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

Correct Answer: Decrease the mass flow rate and to decrease the wetness of steam

Bissoy MCQ
#Mechanical Engineering #Steam Boilers #Engines #Nozzles And Turbines

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
The energy loss in flow through ven-turimeter is less than that through flow nozzle, because in case of a flow nozzle, the
A Length is shorter
B Throat diameter is more
C Sudden expansion of flow in the downstream occurs
D Distance between the throat and the inlet is more
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
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 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 effect of friction in the nozzle __________ dryness fraction of steam.
A Has no effect on
B Decreases
C Increases
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 isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation
A pvls=C
B pv1126 = C
C pv1A = C
D pv = C

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