Steam Boilers, Engines, Nozzles and Turbines
The efficiency of a boiler is defined as

None of these
Ratio of heat actually used in producing steam to the heat liberated in the furnace
Ratio of the heat liberated in the furnace to the heat actually used in producing steam
Ratio of the mass of steam produced to the mass of total water supplied in a given time

ANSWER DOWNLOAD EXAMIANS APP

Steam Boilers, Engines, Nozzles and Turbines
A nozzle is said to be a divergent nozzle

When the cross-section of the nozzle increases continuously from entrance to exit
None of these
When the cross-section of the nozzle decreases continuously from entrance to exit
When the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit

ANSWER DOWNLOAD EXAMIANS APP