Critical
pressure is the pressure of steam at:
Throat of
steam nozzle
Exit of steam
nozzle
Either at
inlet or at outlet of steam nozzle
Inlet of
steam nozzle
Exit of steam
nozzle
Critical
pressure is the pressure of steam at exit of steam nozzle, under the state of
choking of nozzle.
Hence, the correct option is (B).
&Key Points:-
Any boiler
that operates below the critical point is called a subcritical boiler and one
that operates above the critical point is known as a supercritical boiler.
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