How are the fire tubes configured in a Cochran and Scottish marine boiler_________________?
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Answer: A. horizontal
Explanation
Cochran and Scottish marine boilers are classic examples of cylindrical shell boilers. Their internal fire tubes are oriented in a horizontal direction to maximize surface area. Hot combustion gases pass horizontally through these tubes to transfer heat to water. Horizontal tube layouts allow efficient heat transfer within a compact cylindrical boiler shell. Scottish marine boilers feature internal combustion chambers surrounded by horizontal fire tubes. Cochran boilers use a vertical shell but house a bundle of horizontal smoke tubes.
Marine vessels required compact horizontal boilers to fit within restricted ship engine rooms. Stationary industrial plants also adopted these designs for reliable steam production. Proper draft systems ensure gases flow smoothly through these horizontal tube bundles. Vertical boiler orientations are used for specific compact units but not for these tube bundles. Inclined tube configurations are more common in specialized water-tube boiler designs. Combinations of horizontal and vertical tubes apply to complex multi-pass boiler systems.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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