Related Questions

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 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 isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation.
A pv = C
B pv1A = C
C pv1i = C
D pv
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 the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called
A Humidity ratio
B Relative humidity
C Absolute humidity
D Degree of saturation
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 critical pressure ratio for initially wet steam is
A 0.546
B 0.577
C 0.582
D 0.601
In case of steam distillation, the steam leaving the liquid is not completely saturated with distillate vapour, because
A Temperature is less
B Total pressure is less
C Mixing of steam with the material being vaporised is not so intimate as to result in equilibrium condition
D Saturated steam is used for steam distillation
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
A 10 atmospheres
B 20 atmospheres
C 30 atmospheres
D 40 atmospheres
The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will
A Increase
B Decrease
C Remains same
D Depend on saturated boiling point; may increase or decrease

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