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Locomotive boiler dimensions: select the typical length of the boiler shell (approximate). Choose the most commonly cited shell length among the options provided.

Difficulty: Easy

Correct Answer: 2 m

Explanation:

ConceptStandard references for classic locomotive boilers cite a typical shell length ≈ 2 m (order of a couple of metres) with multi-pass fire-tubes and a large grate area for high, fluctuating steam demand in traction service.

Final Answer2 m

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