Steam Boilers, Engines, Nozzles and Turbines
The effect of friction on the flow of steam through a nozzle is to

Increase the mass flow rate and to increase the exit temperature
Increase the exit temperature without any effect on mass flow rate
Decrease the mass flow rate and to increase the wetness of steam
Decrease the mass flow rate and to decrease the wetness of steam

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

None of the listed here
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

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