increases

decreases

has no effect on

none of these

internally fired

externally fired

internally as well as externally fired

none of these

lever safety valve

dead weight safety valve

high steam and low water safety valve

all of these

induced steam jet draught

chimney draught

forced steam jet draught

none of these

The factor of evaporation for all boilers is always greater than unity.

The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100 Degree Centigrade.

The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.

none of these