Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals to atmospheric pressure
Equals that of the surroundings
Equals 760 mm of mercury
Equals the pressure of water in the container

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Steam Boilers, Engines, Nozzles and Turbines
The difference between Cornish boiler and Lancashire boiler is that

Former is water tube type and latter is fire tube type
Former is fire tube type and latter is water tube type boiler
Former contains one fire tube and latter contains two fire tubes
None of the listed here

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

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