A . control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
B . empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
C . put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
D . increase the temperature of saturated steam without raising its pressure
Answer: Option B Answer: (b).empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
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