CBI Fire Protection & Life Safety Systems 2 — Questions and Answers
Question 1: Which of the following materials is classified as a Class A interior finish under ASTM E84 testing?
- Flame spread index of 75–200
- Flame spread index of 26–75
- Flame spread index of 0–25 (Correct answer)
- Flame spread index above 200
Correct answer: Flame spread index of 0–25
ASTM E84 Class A interior finish requires a flame spread index of 0–25 and a smoke-developed index of 0–450.
Question 2: What is the primary function of a fire damper installed in an HVAC duct penetrating a fire-rated wall assembly?
- To reduce noise from airflow
- To prevent fire and smoke from spreading through ductwork (Correct answer)
- To balance air pressure across floors
- To provide makeup air for exhaust systems
Correct answer: To prevent fire and smoke from spreading through ductwork
Fire dampers close automatically upon detecting heat, preventing fire from spreading through duct penetrations in fire-rated barriers.
Question 3: According to the IBC, what is the minimum width of a means of egress corridor serving an occupant load of 50 or more?
- 36 inches
- 44 inches (Correct answer)
- 48 inches
- 60 inches
Correct answer: 44 inches
The IBC requires corridors serving an occupant load of 50 or more to have a minimum clear width of 44 inches.
Question 4: A portable fire extinguisher labeled '2A:10B:C' can be used on which classes of fire?
- Class A only
- Class A and Class B only
- Class A, Class B, and Class C (Correct answer)
- Class B and Class C only
Correct answer: Class A, Class B, and Class C
The rating '2A:10B:C' indicates the extinguisher is rated for Class A (ordinary combustibles), Class B (flammable liquids), and Class C (energized electrical equipment) fires.
Question 5: Which of the following occupancies requires an automatic fire sprinkler system under the IBC regardless of building size?
- Group B (Business)
- Group R-2 (Residential) with 5+ units
- Group H (High-Hazard) (Correct answer)
- Group M (Mercantile)
Correct answer: Group H (High-Hazard)
Group H high-hazard occupancies require automatic fire sprinkler systems due to the inherent danger of the materials stored or used.
Question 6: What is the maximum height of the highest landing served by a scissor stair that can be counted as two separate exits per the IBC?
- Only if separated by a 1-hour fire barrier
- Only if separated by a 2-hour fire barrier
- Only if each stair is in its own exit enclosure (Correct answer)
- Scissor stairs can never be counted as two exits
Correct answer: Only if each stair is in its own exit enclosure
The IBC permits scissor stairs to be counted as two separate exits only when each stair is separated by and contained within its own one-hour fire-resistance-rated exit enclosure.
Question 7: Under NFPA 101 (Life Safety Code), what is the required illumination level for means of egress at floor level during normal operation?
- 1 foot-candle (Correct answer)
- 2 foot-candles
- 5 foot-candles
- 10 foot-candles
Correct answer: 1 foot-candle
NFPA 101 requires a minimum average illumination of 1 foot-candle at floor level along the means of egress during normal conditions.
CBI Fire Protection & Life Safety Systems 2
Which of the following materials is classified as a Class A interior finish under ASTM E84 testing?