Steam Boilers, Engines, Nozzles and Turbines
Locomotive type' boiler is

Vertical tubular fire tube type
Water wall enclosed furnace type
Horizontal multi-tubular water tube boiler
Horizontal multi-tubular fire tube type

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

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

The given boiler with the model
Two different makes of boilers operating under the same operating conditions
The two different boilers of the same make
Any type of boilers operating under any conditions

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