Solve this multiple-choice question and choose the correct option.

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Fire-tube boilers: firing arrangement for typical designs Determine whether common fire-tube boilers are internally or externally fired, based on furnace location. Choose the correct option.

Difficulty: Easy

Internally fired
Externally fired
Internally as well as externally fired (both equally common)
None of these

Correct Answer: Internally fired

Explanation:

ConceptFire-tube boilers such as Cornish, Lancashire, Scotch marine, and locomotive typically have the furnace inside the shell, i.e., are internally fired. Water surrounds the furnace and tubes within the shell.

Final AnswerInternally fired

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