Steam Boilers, Engines, Nozzles and Turbines
Sublimation region is the region where

Solid and liquid phases are in equilibrium
Solid, liquid and vapor phases are in equilibrium
Liquid and vapor phases are in equilibrium
Solid and vapor phases are in equilibrium

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Steam Boilers, Engines, Nozzles and Turbines
Locomotive boiler is a

Single tube, horizontal, internally fired and stationary boiler
Multi-tubular, horizontal, externally fired and stationary boiler
Multi-tubular, horizontal, internally fired and mobile boiler
Single tube, vertical, externally fired and stationary boiler

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