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

None of these
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
When the cross-section of the nozzle decreases continuously from entrance to exit

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation of a boiler is a measure to compare

The two different boilers of the same make
Two different makes of boilers operating under the same operating conditions
The given boiler with the model
Any type of boilers operating under any conditions

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