G22 Carbon Dioxide Systems Mock Examination Newest
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1. What is the primary purpose of a carbon dioxide fire suppression system?
A. To cool burning materials below their ignition temperature
B. To extinguish fire by reducing oxygen concentration
C. To increase humidity around the fire
D. To dilute combustible liquids
Answer: B
Carbon dioxide suppresses fire by displacing oxygen, reducing the oxygen
concentration below the level needed to sustain combustion while providing
minimal cooling.
2. Carbon dioxide is most effective on which classes of fire?
A. Class A only
B. Class K only
C. Class B and Class C
D. Class D only
Answer: C
,CO₂ systems are primarily intended for flammable liquid (Class B) and energized
electrical (Class C) fires because they leave no residue and do not conduct
electricity.
3. Before entering a room protected by a total flooding CO₂ system after
discharge, personnel should:
A. Open electrical panels.
B. Restart ventilation.
C. Verify the area is safe and adequately ventilated.
D. Activate another discharge.
Answer: C
Because carbon dioxide can create an oxygen-deficient atmosphere, the space
must be ventilated and confirmed safe before entry.
4. A major hazard associated with carbon dioxide systems is:
A. Corrosion
B. High humidity
C. Asphyxiation
D. Water damage
Answer: C
The greatest life safety concern is oxygen displacement, which can lead to
unconsciousness or death if occupants remain in the protected area.
5. A total flooding CO₂ system protects a hazard by:
A. Cooling exposed surfaces
B. Filling the entire enclosure with extinguishing concentration
C. Applying foam over burning fuel
D. Spraying water mist
, Answer: B
Total flooding systems achieve extinguishment by maintaining the required CO₂
concentration throughout the enclosure.
6. Local application CO₂ systems are designed to:
A. Flood an entire building
B. Protect only outdoor hazards
C. Discharge directly onto a specific hazard
D. Replace sprinkler systems
Answer: C
Local application systems discharge directly at the specific equipment or process
requiring protection rather than filling an entire room.
7. Which standard provides installation requirements for carbon dioxide
extinguishing systems?
A. NFPA 13
B. NFPA 25
C. NFPA 72
D. NFPA 12
Answer: D
Installation, inspection, and design requirements for carbon dioxide extinguishing
systems are contained in NFPA 12.
8. Before automatic discharge occurs, a protected occupied space should
normally provide:
A. Water spray
B. Foam discharge
C. A pre-discharge warning alarm
(2025 - 2026 Update) From Real Past Papers Questions –
A Set Of 80 Most Common Exam Frequently Tested
Questions And Answers In Details 100% Verified Exam
Highly Recommendable Grade A+ (Verified Answers)
Plus Rationales | Instant Download Pdf
1. What is the primary purpose of a carbon dioxide fire suppression system?
A. To cool burning materials below their ignition temperature
B. To extinguish fire by reducing oxygen concentration
C. To increase humidity around the fire
D. To dilute combustible liquids
Answer: B
Carbon dioxide suppresses fire by displacing oxygen, reducing the oxygen
concentration below the level needed to sustain combustion while providing
minimal cooling.
2. Carbon dioxide is most effective on which classes of fire?
A. Class A only
B. Class K only
C. Class B and Class C
D. Class D only
Answer: C
,CO₂ systems are primarily intended for flammable liquid (Class B) and energized
electrical (Class C) fires because they leave no residue and do not conduct
electricity.
3. Before entering a room protected by a total flooding CO₂ system after
discharge, personnel should:
A. Open electrical panels.
B. Restart ventilation.
C. Verify the area is safe and adequately ventilated.
D. Activate another discharge.
Answer: C
Because carbon dioxide can create an oxygen-deficient atmosphere, the space
must be ventilated and confirmed safe before entry.
4. A major hazard associated with carbon dioxide systems is:
A. Corrosion
B. High humidity
C. Asphyxiation
D. Water damage
Answer: C
The greatest life safety concern is oxygen displacement, which can lead to
unconsciousness or death if occupants remain in the protected area.
5. A total flooding CO₂ system protects a hazard by:
A. Cooling exposed surfaces
B. Filling the entire enclosure with extinguishing concentration
C. Applying foam over burning fuel
D. Spraying water mist
, Answer: B
Total flooding systems achieve extinguishment by maintaining the required CO₂
concentration throughout the enclosure.
6. Local application CO₂ systems are designed to:
A. Flood an entire building
B. Protect only outdoor hazards
C. Discharge directly onto a specific hazard
D. Replace sprinkler systems
Answer: C
Local application systems discharge directly at the specific equipment or process
requiring protection rather than filling an entire room.
7. Which standard provides installation requirements for carbon dioxide
extinguishing systems?
A. NFPA 13
B. NFPA 25
C. NFPA 72
D. NFPA 12
Answer: D
Installation, inspection, and design requirements for carbon dioxide extinguishing
systems are contained in NFPA 12.
8. Before automatic discharge occurs, a protected occupied space should
normally provide:
A. Water spray
B. Foam discharge
C. A pre-discharge warning alarm
