create vacuum in furnace

create vacuum at turbine exhaust

pump feed water

dose chemicals in feed water

babcock and wilcox

locomotive

lancashire

cochran

former is fire tube type and latter is water tube type boiler

former is water tube type and latter is fire tube type

former contains one fire tube and latter contains two fire tubes

None of these

heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum

water is supplied in drum and through downcomers located in atmospheric conditon it passes to the water wall and rises to drum in the from of mixture of water and steam

feed pump is employed to supplement natural circulation in water wall type furnace

None of these

former generates steam at high pressure

former occupies less space for same power

rate of steam flow is more in former case

chances of explosion are less in former case.