NICET SPECIAL HAZARDS SYSTEMS
TECHNICIAN LEVEL II PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026
Q&A | INSTANT DOWNLOAD PDF
1. What is the primary purpose of a special hazards suppression
system?
A. To provide general building fire protection
B. To extinguish fires in areas with sensitive equipment
C. To provide emergency lighting
D. To improve air circulation
Answer: B
Rationale: Special hazards systems are designed for areas with sensitive
equipment or materials where water damage from sprinklers could be
catastrophic.
2. Which agent is most commonly used in total flooding clean agent
systems?
A. Water
B. Carbon dioxide (CO₂)
C. FM-200
D. Dry chemical
Answer: C
Rationale: FM-200 is widely used for total flooding clean agent systems
due to its efficiency and minimal environmental impact.
,3. In a clean agent system, what is the minimum concentration
required to extinguish a fire?
A. 20%
B. 5%
C. Design concentration
D. 50%
Answer: C
Rationale: The system is designed to discharge the agent at a specific
“design concentration” sufficient to extinguish the fire class it protects.
4. What type of piping is commonly used for clean agent systems?
A. Black steel
B. Stainless steel or copper
C. PVC
D. Aluminum
Answer: B
Rationale: Stainless steel or copper is used due to corrosion resistance
and compatibility with clean agents.
5. How often should a special hazards system be inspected per NFPA
2001?
A. Monthly
B. Semiannually
C. Annually
D. Every 5 years
,Answer: C
Rationale: Annual inspections are required to ensure system integrity
and readiness.
6. What is the primary hazard of using CO₂ suppression systems in
occupied areas?
A. Freezing injuries
B. Toxicity
C. Fire re-ignition
D. Water damage
Answer: B
Rationale: CO₂ displaces oxygen, creating a serious suffocation risk in
occupied spaces.
7. Which NFPA standard covers clean agent fire extinguishing
systems?
A. NFPA 13
B. NFPA 25
C. NFPA 2001
D. NFPA 72
Answer: C
Rationale: NFPA 2001 specifically addresses clean agent fire
extinguishing systems.
8. What is the most common initiating device for special hazards
systems?
A. Smoke detector
, B. Heat detector
C. Manual pull station
D. Any of the above
Answer: D
Rationale: Special hazards systems can be triggered by smoke detectors,
heat detectors, or manual pull stations depending on design.
9. Which of the following is a disadvantage of wet chemical
suppression systems?
A. Corrosive to metals
B. Leaves no residue
C. Safe for electronics
D. Only effective on water-soluble fires
Answer: A
Rationale: Wet chemical systems, often used in kitchen applications,
can be corrosive if not properly cleaned after discharge.
10. What is a common clean agent used in inert gas systems?
A. Nitrogen
B. Argon
C. FM-200
D. Both A and B
Answer: D
Rationale: Inert gas systems often use a combination of nitrogen and
argon to suppress fires safely.
TECHNICIAN LEVEL II PRACTICE EXAM
QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026
Q&A | INSTANT DOWNLOAD PDF
1. What is the primary purpose of a special hazards suppression
system?
A. To provide general building fire protection
B. To extinguish fires in areas with sensitive equipment
C. To provide emergency lighting
D. To improve air circulation
Answer: B
Rationale: Special hazards systems are designed for areas with sensitive
equipment or materials where water damage from sprinklers could be
catastrophic.
2. Which agent is most commonly used in total flooding clean agent
systems?
A. Water
B. Carbon dioxide (CO₂)
C. FM-200
D. Dry chemical
Answer: C
Rationale: FM-200 is widely used for total flooding clean agent systems
due to its efficiency and minimal environmental impact.
,3. In a clean agent system, what is the minimum concentration
required to extinguish a fire?
A. 20%
B. 5%
C. Design concentration
D. 50%
Answer: C
Rationale: The system is designed to discharge the agent at a specific
“design concentration” sufficient to extinguish the fire class it protects.
4. What type of piping is commonly used for clean agent systems?
A. Black steel
B. Stainless steel or copper
C. PVC
D. Aluminum
Answer: B
Rationale: Stainless steel or copper is used due to corrosion resistance
and compatibility with clean agents.
5. How often should a special hazards system be inspected per NFPA
2001?
A. Monthly
B. Semiannually
C. Annually
D. Every 5 years
,Answer: C
Rationale: Annual inspections are required to ensure system integrity
and readiness.
6. What is the primary hazard of using CO₂ suppression systems in
occupied areas?
A. Freezing injuries
B. Toxicity
C. Fire re-ignition
D. Water damage
Answer: B
Rationale: CO₂ displaces oxygen, creating a serious suffocation risk in
occupied spaces.
7. Which NFPA standard covers clean agent fire extinguishing
systems?
A. NFPA 13
B. NFPA 25
C. NFPA 2001
D. NFPA 72
Answer: C
Rationale: NFPA 2001 specifically addresses clean agent fire
extinguishing systems.
8. What is the most common initiating device for special hazards
systems?
A. Smoke detector
, B. Heat detector
C. Manual pull station
D. Any of the above
Answer: D
Rationale: Special hazards systems can be triggered by smoke detectors,
heat detectors, or manual pull stations depending on design.
9. Which of the following is a disadvantage of wet chemical
suppression systems?
A. Corrosive to metals
B. Leaves no residue
C. Safe for electronics
D. Only effective on water-soluble fires
Answer: A
Rationale: Wet chemical systems, often used in kitchen applications,
can be corrosive if not properly cleaned after discharge.
10. What is a common clean agent used in inert gas systems?
A. Nitrogen
B. Argon
C. FM-200
D. Both A and B
Answer: D
Rationale: Inert gas systems often use a combination of nitrogen and
argon to suppress fires safely.
