, Question 1
During a risk assessment for a high-rise office building, which factor most
significantly increases the life-safety risk during a fire evacuation?
A. Building height exceeding 75 feet
B. Presence of a voice communication system
C. Use of fire-resistive construction
D. Occupant load density exceeding 1 person per 100 square feet
Correct Answer: D - Occupant load density exceeding 1 person
per 100 square feet
RATIONALE
High occupant load density increases congestion and evacuation time,
elevating risk. Height alone (A) is mitigated by fire-resistive features
and systems; voice communication (B) and fire-resistive construction
(C) reduce risk. Density is a critical factor per NFPA 101.
Question 2
In a compartment fire, which condition indicates that the fire has transitioned
to a fully developed stage?
A. Rollover occurs
B. Flashover has occurred
C. Smoke layer reaches the floor
D. Fire is ventilation-limited
Correct Answer: B - Flashover has occurred
RATIONALE
Flashover marks the transition to fully developed stage, where all
combustibles ignite. Rollover (A) precedes flashover; smoke layer
reaching floor (C) indicates underventilated conditions;
ventilation-limited (D) can occur pre- or post-flashover. NFPA 921
defines stages clearly.
Page 2
, Question 3
A hazardous materials incident involves an unknown liquid. Using the ERG,
which guide number should be used if the material is identified as UN 1203
(Gasoline)?
A. Guide 128
B. Guide 130
C. Guide 153
D. Guide 155
Correct Answer: A - Guide 128
RATIONALE
UN 1203 Gasoline is in Guide 128 (Flammable Liquids - Water
Immiscible). Guide 130 is for water-miscible flammable liquids;
Guide 153 is for toxic substances; Guide 155 is for toxic gases. ERG
2024 is current.
Question 4
In the Incident Command System, which position is responsible for developing
the Incident Action Plan?
A. Operations Section Chief
B. Planning Section Chief
C. Logistics Section Chief
D. Finance/Administration Section Chief
Correct Answer: B - Planning Section Chief
RATIONALE
The Planning Section Chief leads development of the IAP,
coordinating with other sections. Operations (A) executes tactics;
Logistics (C) provides resources; Finance (D) tracks costs. NIMS
guidelines specify Planning's role.
Page 3
, Question 5
Which leading indicator is most predictive of future workplace injuries in an
emergency response organization?
A. Lost time injury rate
B. Near-miss reporting frequency
C. Number of safety training hours per employee
D. Total recordable incident rate
Correct Answer: B - Near-miss reporting frequency
RATIONALE
Near-miss reporting frequency is a leading indicator that reveals
hazards before injuries occur. Lost time injury rate (A) and total
recordable incident rate (D) are lagging indicators; training hours (C)
may not reflect effectiveness. OSHA emphasizes leading indicators.
Question 6
During a confined space rescue, which atmospheric condition requires
immediate evacuation regardless of PPE?
A. Oxygen concentration of 19.5%
B. Hydrogen sulfide at 5 ppm
C. Carbon monoxide at 35 ppm
D. Flammable gas at 10% LEL
Correct Answer: A - Oxygen concentration of 19.5%
RATIONALE
Oxygen below 19.5% is immediately dangerous to life or health
(IDLH) and requires evacuation. H2S at 5 ppm (B) is below
permissible exposure limit; CO at 35 ppm (C) is below ceiling; 10%
LEL (D) is safe for entry with monitoring. OSHA 1910.146 defines
IDLH.
Page 4
During a risk assessment for a high-rise office building, which factor most
significantly increases the life-safety risk during a fire evacuation?
A. Building height exceeding 75 feet
B. Presence of a voice communication system
C. Use of fire-resistive construction
D. Occupant load density exceeding 1 person per 100 square feet
Correct Answer: D - Occupant load density exceeding 1 person
per 100 square feet
RATIONALE
High occupant load density increases congestion and evacuation time,
elevating risk. Height alone (A) is mitigated by fire-resistive features
and systems; voice communication (B) and fire-resistive construction
(C) reduce risk. Density is a critical factor per NFPA 101.
Question 2
In a compartment fire, which condition indicates that the fire has transitioned
to a fully developed stage?
A. Rollover occurs
B. Flashover has occurred
C. Smoke layer reaches the floor
D. Fire is ventilation-limited
Correct Answer: B - Flashover has occurred
RATIONALE
Flashover marks the transition to fully developed stage, where all
combustibles ignite. Rollover (A) precedes flashover; smoke layer
reaching floor (C) indicates underventilated conditions;
ventilation-limited (D) can occur pre- or post-flashover. NFPA 921
defines stages clearly.
Page 2
, Question 3
A hazardous materials incident involves an unknown liquid. Using the ERG,
which guide number should be used if the material is identified as UN 1203
(Gasoline)?
A. Guide 128
B. Guide 130
C. Guide 153
D. Guide 155
Correct Answer: A - Guide 128
RATIONALE
UN 1203 Gasoline is in Guide 128 (Flammable Liquids - Water
Immiscible). Guide 130 is for water-miscible flammable liquids;
Guide 153 is for toxic substances; Guide 155 is for toxic gases. ERG
2024 is current.
Question 4
In the Incident Command System, which position is responsible for developing
the Incident Action Plan?
A. Operations Section Chief
B. Planning Section Chief
C. Logistics Section Chief
D. Finance/Administration Section Chief
Correct Answer: B - Planning Section Chief
RATIONALE
The Planning Section Chief leads development of the IAP,
coordinating with other sections. Operations (A) executes tactics;
Logistics (C) provides resources; Finance (D) tracks costs. NIMS
guidelines specify Planning's role.
Page 3
, Question 5
Which leading indicator is most predictive of future workplace injuries in an
emergency response organization?
A. Lost time injury rate
B. Near-miss reporting frequency
C. Number of safety training hours per employee
D. Total recordable incident rate
Correct Answer: B - Near-miss reporting frequency
RATIONALE
Near-miss reporting frequency is a leading indicator that reveals
hazards before injuries occur. Lost time injury rate (A) and total
recordable incident rate (D) are lagging indicators; training hours (C)
may not reflect effectiveness. OSHA emphasizes leading indicators.
Question 6
During a confined space rescue, which atmospheric condition requires
immediate evacuation regardless of PPE?
A. Oxygen concentration of 19.5%
B. Hydrogen sulfide at 5 ppm
C. Carbon monoxide at 35 ppm
D. Flammable gas at 10% LEL
Correct Answer: A - Oxygen concentration of 19.5%
RATIONALE
Oxygen below 19.5% is immediately dangerous to life or health
(IDLH) and requires evacuation. H2S at 5 ppm (B) is below
permissible exposure limit; CO at 35 ppm (C) is below ceiling; 10%
LEL (D) is safe for entry with monitoring. OSHA 1910.146 defines
IDLH.
Page 4
