Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is a

Single tube, horizontal, internally fired and stationary boiler
Multi-tubular, horizontal, internally fired and mobile boiler
Multi-tubular, horizontal, externally fired and stationary boiler
Single tube, vertical, externally fired and stationary boiler

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

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

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

It erodes furnace walls
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

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