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

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

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Steam Boilers, Engines, Nozzles and Turbines
Stoichiometric quantity of air is the

Air required for optimum combustion so as to have reasonable excess air
Air present in atmosphere at NTP conditions
Air required to convert CO into CO₂
Air required for complete combustion of fuel with no excess air

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