Which of the following words means: tubes that keep the furnace heat controlled and reduce the use of refractory material.

Which of the following words means: tubes that shield the superheater tubes from excessive heating so that the heat radiated from the flames in the furnace do not damage them

Which of the following words: means refractory shell

Which of the following words: means a shallow dish type arrangement fitted at the normal water level which allows the blowdown of floating impurities, oil foaming etc. from the water surface.

Which of the following words: means usually non-return type of valve directly mounted on the steam space of the boiler shell used for generating steam in the boiler.

They act to expel soot and the products of combustion from the tube surfaces

These tubes are placed along the path of flow of the hot gases and heat exchange takes place inside

They supply the fuel and air to the furnace

It preheats the feeding water

The place where fuel is burnt