The primary function of a flame safeguard system, as used on an automatically fired auxiliary boiler, is to prevent __________.

Correct Answer: Option C — explosions in the boiler furnace

Automatic auxiliary boilers rely on flame safeguard systems to detect ignition failures instantly. Under 46 CFR Subchapter F standards for marine auxiliary systems, this prevents unburned fuel accumulation in the combustion chamber, averting catastrophic furnace explosions upon subsequent ignition attempts.