Steam Boilers, Engines, Nozzles and Turbines
In accelerated circulation type boiler

Heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
Feed pump is employed to supplement natural circulation in water wall type furnace
Water is supplied in drum and through down comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
Water is converted into steam in one pass without any recirculation

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Steam Boilers, Engines, Nozzles and Turbines
Stoichiometric quantity of air is the

Air required for complete combustion of fuel with no excess air
Air present in atmosphere at NTP conditions
Air required for optimum combustion so as to have reasonable excess air
Air required to convert CO into CO₂

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is a

Single tube, vertical, externally fired and stationary boiler
Single tube, horizontal, internally fired and stationary boiler
Multi-tubular, horizontal, internally fired and mobile boiler
Multi-tubular, horizontal, externally fired and stationary boiler

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