Engineering · Steam — Safety
The single most dangerous condition for a fired boiler is:
- AHigh superheat temperature
- BLow water level, which can overheat and rupture tubes✓ Correct
- CExcess feedwater
- DHigh stack temperature
Explanation
Low water uncovers heating surfaces; the metal overheats and can rupture, causing a catastrophic boiler failure. Low-water fuel cutoffs and constant gauge-glass watch guard against it.
Authority: Steam Plants (USCG engineering topic)
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