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

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

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

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

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Steam Boilers, Engines, Nozzles and Turbines
A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

Packaged boiler does not exist
Supplied by same manufacturer loose and assembled at site
Purchased from several parties and packed together at site
Supplied mounted on a single base

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