Which of the following components can cause a furnace explosion if not managed properly?

A furnace explosion can occur due to several factors, and managing those components is vital to ensuring safe operation. Among the options provided, fuel quantity management is especially critical. If the amount of fuel supplied to the furnace is not properly controlled, it can lead to an excessive buildup of combustibles in the combustion chamber. When this excess fuel ignites, it can create an explosive reaction.

Temperature control is another important factor. If the furnace temperature is not maintained within safe limits, it can further exacerbate issues related to combustion and potentially lead to explosive conditions.

Corrosion effects can also contribute to dangerous situations in a furnace. Although corrosion primarily affects the integrity of the furnace structure over time, it can create small openings or leaks, leading to the escape of combustible gases. If those gases accumulate and are subsequently ignited, they can cause explosions.

Selecting "all of the above" captures the comprehensive nature of what can lead to a furnace explosion, recognizing that each listed factor—temperature control, fuel quantity management, and corrosion—plays a significant role in ensuring safe furnace operation. Thus, it's essential to manage all these components effectively to prevent a furnace explosion.