control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required

empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler

put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit

increase the temperature of saturated steam without raising its pressure

2 to 4.5 m

3 to 5 m

5 to 7.5 m

7 to 9 m

ratio of thermal efficiency to the Rankine efficiency

ratio of brake power to the indicated power

ratio of heat equivalent to indicated power to the energy supplied in steam

product of thermal efficiency and Rankine efficiency

Right

Wrong

Right

Wrong