Steam Boilers, Engines, Nozzles and Turbines
Locomotive type' boiler is

Horizontal multi-tubular water tube boiler
Water wall enclosed furnace type
Horizontal multi-tubular fire tube type
Vertical tubular fire tube type

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Steam Boilers, Engines, Nozzles and Turbines
Degree of reaction is defined as the ratio of

Heat drop in moving blades to the heat drop in fixed blades
Heat drop in moving blades to the heat drop in fixed blades plus heat drop in moving blades
Heat drop in fixed blades plus heat drop in moving blades to the heat drop in moving blades
Heat drop in fixed blades to the heat drop in moving blades

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Steam Boilers, Engines, Nozzles and Turbines
The relative efficiency is defined as the

Product of thermal efficiency and Rankine efficiency
Ratio of thermal efficiency to Rankine efficiency
Ratio of heat equivalent to indicated power to the energy supplied in steam
Ratio of brake power to the indicated power

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