In a means of egress, protection of stairwells from ______________ is extremely important.

• A. Products of Combustion
• B. Heat
• C. Rainfall
• D. Noise

Answer: (A)

The key idea is keeping the means of egress, especially stairs, free from smoke and burning byproducts so occupants can escape safely. In a fire, stairwells must be protected from products of combustion because smoke, toxic gases, and hot gases can infiltrate these enclosed routes, reducing visibility, impairing breathing, and raising temperatures to dangerous levels. When stairwells stay tenable, people can evacuate more quickly and firefighters can work more effectively.

Rainfall might affect exterior stairs, but it isn’t the main safety concern inside a building during a fire. Noise has no direct impact on the safety of escaping or on keeping stairwells passable. Heat is related to fires, but the most precise and comprehensive term here is products of combustion, as it covers smoke and combustion byproducts that threaten the integrity of the egress path.