last superheater or reheater and air preheater

induced draft fan and forced draft fan

air preheater and chimney

none of the above

water passes through the tubes which are surrounded by flames and hot gases

the flames and hot gases pass through the tubes which are surrounded by water

forced circulation takes place

none of these

ratio of heat actually used in producing steam to the heat liberated in the furnace

ratio of the mass of steam produced to the mass of total water supplied in a given time

ratio of the heat liberated in the furnace to the heat actually Used in producing steam

none of the above

condenser efficiency

vacuum efficiency

nozzle efficiency

boiler efficiency

blow off cock

feed check valve

steam stop valve

none of these