Steam Boilers, Engines, Nozzles and Turbines
The function of a safety valve is

To blow off steam when the pressure of steam inside the boiler exceeds the working pressure
To measure pressure of steam inside the steam boiler
To indicate the water level inside the boiler to an observer
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The function of a piston in a steam engine is

To convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment
To guide motion of the piston rod and to prevent it from bending
None of these
To transfer motion from the piston to the cross-head

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

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 has heating value
It erodes furnace walls

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