Fire Safety Fire Safety Fundamentals 2 — Questions and Answers
Question 1: What is flashover in fire behavior?
- When a flashlight battery dies
- The near-simultaneous ignition of all combustible materials in a room when temperatures reach approximately 1,100°F (Correct answer)
- When a fire is extinguished suddenly
- A type of electrical short circuit
Correct answer: The near-simultaneous ignition of all combustible materials in a room when temperatures reach approximately 1,100°F
Flashover occurs when radiant heat from the fire and hot gases causes all exposed combustible surfaces in a room to ignite nearly simultaneously, creating fully developed fire conditions.
Question 2: What is the purpose of a fire wall in building construction?
- To display fire safety posters
- To prevent fire from spreading between sections of a building or between adjacent buildings (Correct answer)
- To store fire equipment
- To block wind from entering the building
Correct answer: To prevent fire from spreading between sections of a building or between adjacent buildings
Fire walls are specially constructed barriers rated to resist fire penetration for specific time periods, preventing fire spread between building sections or adjacent structures.
Question 3: What is the difference between a fire door and a regular door?
- Fire doors are always red
- Fire doors are rated to resist fire for a specific time period and have self-closing mechanisms (Correct answer)
- Fire doors are heavier but function the same
- There is no significant difference
Correct answer: Fire doors are rated to resist fire for a specific time period and have self-closing mechanisms
Fire doors are constructed and tested to withstand fire for rated periods (20-180 minutes) and include self-closing devices to ensure they remain closed during a fire.
Question 4: What is the fire safety concern with vertical openings in buildings like stairwells and elevator shafts?
- They are hard to clean
- They create a 'chimney effect' allowing fire and smoke to spread rapidly to upper floors (Correct answer)
- They make buildings look less attractive
- They are only a concern in wooden buildings
Correct answer: They create a 'chimney effect' allowing fire and smoke to spread rapidly to upper floors
Vertical openings act as chimneys, allowing hot gases and smoke to rise rapidly through the building, spreading fire to upper floors much faster than horizontal spread.
Question 5: What type of construction material is classified as 'non-combustible'?
- Treated wood
- Steel, concrete, and masonry (Correct answer)
- Fire-retardant-treated plywood
- All building materials when properly treated
Correct answer: Steel, concrete, and masonry
Non-combustible materials like steel, concrete, and masonry do not burn or contribute fuel to a fire, though steel can lose structural strength at high temperatures.
Question 6: What is the purpose of a fire safety plan for a construction site?
- To satisfy the general contractor's checklist
- To identify fire hazards, establish prevention measures, and outline emergency procedures specific to the site (Correct answer)
- To document building materials used
- To list the number of workers on site
Correct answer: To identify fire hazards, establish prevention measures, and outline emergency procedures specific to the site
A construction site fire safety plan addresses the unique and changing fire hazards present during construction, including hot work, temporary heating, and combustible materials storage.
Fire Safety Fire Safety Fundamentals 2
What is flashover in fire behavior?