Related Questions

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
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 critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.
A More
B Less
C Same
D None of these
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 isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67
The critical pressure ratio for initially dry saturated steam is
A 0.546
B 0.577
C 0.582
D 0.601
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
Isentropic nozzle flow states about the movement of a gas or fluid through a narrow surface without an increase or decrease in-
A Pressure
B Energy
C Displacement
D Entropy
Dry saturated steam can be converted into superheated steam by
A Increasing its cross-sectional area of flow
B Passing it through a pressure reducing valve
C Forcing it downwards through a vertical tube
D None of these
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

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