In an impulse turbine, steam expands
In a nozzle, the effect of supersaturation is to increase the dryness fraction of steam.
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
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
The impulse reaction turbine has its driving force
The critical pressure ratio for initially dry saturated steam is more as compared to initially wet steam.
The difference of supersaturated temperature and saturation temperature at that pressure is called
When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be
The variation of steam pressure in the nozzle depends upon
The critical pressure gives the velocity of steam at the throat
The rate of discharge through the nozzle __________ when the exit pressure is gradually reduced.
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity (V) at inlet)
In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.
In reaction turbines, the axial thrust is due to
The turbine, in which the general direction of the steam flow is parallel to the turbine axis, is called axial flow turbines
The ratio of the workdone on the blades to the energy supplied to the blades, is called
Steam turbines are used for
The Parsons' reaction turbine has
The velocity of steam leaving the nozzle (V) is given by (where K = Nozzle coefficient or nozzle efficiency, and hd = Enthalpy or heat drop during expansion of steam in a nozzle)
A regenerative steam cycle renders
Parson's reaction turbine is a __________ reaction turbine.
The ratio of the useful heat drop to the isentropic heat drop is called
Which of the following statement is correct?
The critical pressure gives the velocity of steam at the throat equal to the velocity of sound.
The discharge is __________ at critical pressure.
Parson's turbine is a
The action of steam in a steam turbine is
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