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Cochran vertical boiler: orientation of the fire tubes Cochran boiler is a vertical, multi-tubular fire-tube boiler. State the orientation of its fire tubes between the combustion chamber and the smoke box. Choose the correct option.

Difficulty: Easy

Vertical tubes
Horizontal tubes
Inclined tubes
Helical tubes

Correct Answer: Horizontal tubes

Explanation:

Concept
The Cochran boiler has a vertical shell and horizontal fire tubes. Hot gases from the hemispherical furnace/combustion chamber pass through many small-diameter horizontal tubes to the smoke box, transferring heat to the surrounding water.

Final Answer
Horizontal tubes

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