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

Flame safeguard systems are critical safety interlocks required by 46 CFR. Their primary function is to monitor the burner flame and initiate an immediate fuel shutoff if the flame is lost. This prevents the accumulation of unburned fuel in the furnace, which could lead to a catastrophic furnace explosion.