Are there any defective plates anywhere about your boiler?
Is the boiler so set that you can inspect every part of it when necessary?
If not, how can you tell in what condition the plates are?
Are not some of the lower courses of tubes or flues in your boiler choked with soot or ashes?
Do you absolutely know, of your own knowledge, that your boiler is in safe and economical working order, or do you merely suppose it is?
QUESTIONS
ASKED OF A CANDIDATE FOR A MARINE LICENSE RELATING TO DEFECTS IN BOILER WITH ANSWERS.
If you find a thin plate, what would you do?
Put a patch on.
Would you put it on inside or outside?
Inside.
Why so?
Because the action that has weakened the plate will then act on the patch, and when this is worn it can be replaced; but the plate remains as we found it.