Steam Boilers, Engines, Nozzles and Turbines
The three "Ts" for good combustion are

Total air, time, and temperature
Total air, true fuel, and turbulence
Thorough mixing, total air and temperature
Temperature, time, and turbulence

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Steam Boilers, Engines, Nozzles and Turbines
The object of producing draught in a boiler is

To exhaust the gases of combustion from the combustion chamber
All of the listed here
To discharge the gases of combustion to the atmosphere through the chimney
To provide an adequate supply of air for the fuel combustion

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