Question

sprinkler operation may adversely impact which of the following smoke control methods?

• exhaust method
• pressurization method
• opposed airflow method
• sprinklers do not impact smoke control

question 38

stairways that are designed to limit the penetration of smoke, heat, and toxic gases from a fire on a floor of a building into the stairway, and that serve as part of a means of egress is the definition of:

• fireproof enclosures.
• heatproof enclosures.
• smokeproof enclosures.
• circular stairs.

Explanation:

Analyze sprinkler impact on smoke control

Using the Smoke Control Methods knowledge point, we analyze how water spray from automatic sprinklers affects different smoke control systems. Sprinkler operation cools smoke, reducing its buoyancy and causing it to lose its upward thermal lift. This cooling effect can cause smoke to descend (smoke logging) and can disrupt the thermal stratification required for the Exhaust method to effectively extract hot smoke from upper layers.

Identify definition of protected stairways

We analyze the definition of stairways designed to limit the penetration of smoke, heat, and toxic gases to serve as a safe means of egress. According to standard building and fire codes (such as the International Building Code and NFPA 101), a stairway designed with specific ventilation, pressurization, or vestibules to prevent the entry of products of combustion is defined as a smokeproof enclosure.

Answer:

Question 1

• (A) Exhaust method (Correct answer)
• (B) Pressurization method
• (C) Opposed airflow method
• (D) sprinklers do not impact smoke control

Question 2

• (A) fireproof enclosures.
• (B) heatproof enclosures.
• (C) smokeproof enclosures. (Correct answer)
• (D) circular stairs.