Steam Boilers, Engines, Nozzles and Turbines
In water tube boilers

Water passes through the tubes which are surrounded by flames and hot gases
None of these
The flames and hot gases pass through the tubes which are surrounded by water
Forced circulation takes place

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Coke is produced by

Pulverizing coal in inert atmosphere
Strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel
Enriching carbon in the coal
Heating wood in a limited supply of air at temperatures below 300°C

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