According to 46 CFR regulations pertaining to tests and inspections as related to automatic auxiliary boilers burning heavy fuel oil, the fuel temperature limit control must be checked for proper shutdown operation. What statement is true?

Correct Answer: Option C — To initiate a safety shutdown, the fuel temperature must be lowered to a value below what is required for safe combustion. After the safety shutdown, a manual reset must be required before boiler restart.

Heavy fuel oil automatic auxiliary boilers require fuel temperature limit verification. Dropping fuel temperature below safe combustion parameters must trigger a safety shutdown under 46 CFR, and a manual reset must be performed prior to restarting the unit.