Steam Boilers, Engines, Nozzles and Turbines
Gusset stays in a boiler are provided to

Prevent leakage of hot flue gases
Prevent the bulging of flat surfaces
Support furnace freely from top
Avoid explosion in furnace

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Steam Boilers, Engines, Nozzles and Turbines
In fire tube boilers

The flames and hot gases pass through the tubes which are surrounded by water
None of these
Water passes through the tubes which are surrounded by flames and hot gases
Forced circulation takes place

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

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
To exhaust the gases of combustion from the combustion chamber

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