When the pressure inside the boiler drum exceeds the desired level, then which of the following devices blows off the excess steam from the boiler?
Blow-off cock
Fusible plug
Safety valve
Stop valve
Safety valve
If the pressure of steam in the boiler drum exceeds the working pressure, then the safety valve allows valve off the excess quantity of steam to atmosphere. Thus the pressure of steam in the drum falls.
Hence, the correct option is (C).
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