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

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

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about effect of sulphur in fuel?

It has heating value
It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
It helps in electrostatic precipitation of ash in flue gases
It erodes furnace walls

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