one

two

three

four

fire tube

water tube

pressurised boiler

none of these

slow speed engine

vertical steam engine

condensing steam engine

non-condensing steam engine

lower

higher

zero

none of these

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

the amount of water evaporated or steam produced in kg per kg of fuel burnt

the amount of water evaporated from and at 100 Degree Centigrade into dry and saturated steam

the evaporation of 15.653 kg of water per hour from and at 100 Degree Centigrade