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NICET Level II Special Hazards Systems certification EXAM–
ACTUAL EXAM COMPLETE QUESTIONS AND VERIFIED
SOLUTIONS LATEST UPDATE THIS YEAR
NICET Level II Special Hazards Systems certification. At this level, the focus shifts from basic
installation to functional testing, advanced inspection, and troubleshooting of specialized
suppression systems (Carbon Dioxide, Clean Agent, Foam-Water, and Dry/Wet Chemical).
Exam Content Areas (NICET Level II)
NFPA Standards: 11, 12, 13, 17, 17A, 72, 750, and 2001.
System Components: Actuators, pressure switches, nozzles, and abort stations.
Calculations: Equivalent pipe lengths, flow rates, and enclosure volumes.
Safety: Lockout/tagout, SCBA requirements, and high-pressure cylinder handling.
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NICET Special Hazards Level II Practice Exam (Batch 1)
1. Which type of fire extinguisher is specifically designed for Class B fires?
A. Water
B. Foam
C. Carbon dioxide
D. Wet chemical
Correct Answer: B
Rationale: Foam extinguishers suppress Class B fires (flammable liquids) by creating a blanket
that separates the fuel from oxygen and cools the surface.
2. According to NFPA 2001, the "Maximum Protected Height" of a clean agent nozzle is
determined by:
A. The manufacturer's listing.
B. The ceiling height minus 12 inches.
C. The floor-to-ceiling distance plus 10%.
D. The diameter of the pipe.
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Correct Answer: A
Rationale: Clean agent nozzles are flow-tested and listed by laboratories (UL/FM). The
maximum height they can effectively discharge is strictly defined by the manufacturer’s
technical manual.
3. In a CO2 total flooding system, what is the required "Pre-Discharge Alarm" time according to
NFPA 12?
A. 10 seconds.
B. 20 seconds.
C. Sufficient time to allow for evacuation of the space.
D. Exactly 60 seconds.
Correct Answer: C
Rationale: NFPA 12 does not set a universal "second" count but mandates that the delay must
be long enough for the slowest person in the hazard area to exit before the concentration
reaches lethal levels.
4. When performing a "Puff Test" on a special hazard system, the primary goal is to verify:
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A. The weight of the agent.
B. That the piping is unobstructed and correctly directed to the nozzles.
C. The electrical continuity of the solenoid.
D. The pressure of the nitrogen pilot.
Correct Answer: B
Rationale: A puff test uses low-pressure air or nitrogen to ensure there are no caps left on
pipes, no debris in the lines, and that air actually reaches every nozzle in the circuit.
5. Which component is used to prevent the accidental discharge of a system during
maintenance?
A. A check valve.
B. A discharge pressure switch.
C. A physical lockout or isolation valve.
D. A liquid level indicator.
Correct Answer: C
NICET Level II Special Hazards Systems certification EXAM–
ACTUAL EXAM COMPLETE QUESTIONS AND VERIFIED
SOLUTIONS LATEST UPDATE THIS YEAR
NICET Level II Special Hazards Systems certification. At this level, the focus shifts from basic
installation to functional testing, advanced inspection, and troubleshooting of specialized
suppression systems (Carbon Dioxide, Clean Agent, Foam-Water, and Dry/Wet Chemical).
Exam Content Areas (NICET Level II)
NFPA Standards: 11, 12, 13, 17, 17A, 72, 750, and 2001.
System Components: Actuators, pressure switches, nozzles, and abort stations.
Calculations: Equivalent pipe lengths, flow rates, and enclosure volumes.
Safety: Lockout/tagout, SCBA requirements, and high-pressure cylinder handling.
,Page 2 of 99
NICET Special Hazards Level II Practice Exam (Batch 1)
1. Which type of fire extinguisher is specifically designed for Class B fires?
A. Water
B. Foam
C. Carbon dioxide
D. Wet chemical
Correct Answer: B
Rationale: Foam extinguishers suppress Class B fires (flammable liquids) by creating a blanket
that separates the fuel from oxygen and cools the surface.
2. According to NFPA 2001, the "Maximum Protected Height" of a clean agent nozzle is
determined by:
A. The manufacturer's listing.
B. The ceiling height minus 12 inches.
C. The floor-to-ceiling distance plus 10%.
D. The diameter of the pipe.
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Correct Answer: A
Rationale: Clean agent nozzles are flow-tested and listed by laboratories (UL/FM). The
maximum height they can effectively discharge is strictly defined by the manufacturer’s
technical manual.
3. In a CO2 total flooding system, what is the required "Pre-Discharge Alarm" time according to
NFPA 12?
A. 10 seconds.
B. 20 seconds.
C. Sufficient time to allow for evacuation of the space.
D. Exactly 60 seconds.
Correct Answer: C
Rationale: NFPA 12 does not set a universal "second" count but mandates that the delay must
be long enough for the slowest person in the hazard area to exit before the concentration
reaches lethal levels.
4. When performing a "Puff Test" on a special hazard system, the primary goal is to verify:
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A. The weight of the agent.
B. That the piping is unobstructed and correctly directed to the nozzles.
C. The electrical continuity of the solenoid.
D. The pressure of the nitrogen pilot.
Correct Answer: B
Rationale: A puff test uses low-pressure air or nitrogen to ensure there are no caps left on
pipes, no debris in the lines, and that air actually reaches every nozzle in the circuit.
5. Which component is used to prevent the accidental discharge of a system during
maintenance?
A. A check valve.
B. A discharge pressure switch.
C. A physical lockout or isolation valve.
D. A liquid level indicator.
Correct Answer: C
