Steam Boilers, Engines, Nozzles and Turbines
Blow off cock in a boiler is used to

Increase the temperature of saturated steam without raising its pressure
Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required

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Steam Boilers, Engines, Nozzles and Turbines
Coke is produced by

Pulverizing coal in inert atmosphere
Enriching carbon in the coal
Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Heating wood in a limited supply of air at temperatures below 300°C

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