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

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

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler?

Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler
Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler
Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes
Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube

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