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Illinois Firefighter III Certification Examination Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf
1.Which NFPA standard primarily governs Firefighter Professional Qualifications for Firefighter III–equivalent levels?
A. NFPA 13
B. NFPA 472
C. NFPA 1001
D. NFPA 1021
Answer: C
Rationale: NFPA 1001 defines training, skills, and job performance
requirements for Firefighters.
2. 1 / 4
When performing size-up, which factor should be assessed first?
- Water supply
- Building construction
- Time of day
- Life safety hazards
Answer: D
Rationale: Protecting and identifying life hazards is always the top priority.
3.Which construction type offers the highest fire-resistance rating?
- Type V
- Type III
- Type IV
- Type I
Answer: D
Rationale: Type I construction uses noncombustible materials with the
greatest fire resistance.
4.
A bowstring truss roof is most likely to fail due to:
- Poor ventilation
- Early collapse under fire conditions
- Excessive water application
- Firefighter weight only 2 / 4
Answer: B
Rationale: Bowstring trusses commonly fail early and without warning.
5.Which hazard is most common during overhaul?
- Explosion
- Collapse of entire building
- Hidden fire pockets
- Wind-driven fire
Answer: C
Rationale: Fire can remain in concealed spaces, requiring careful overhaul.
6.
The primary purpose of ventilation is to:
- Extinguish fire directly
- Remove heat, smoke, and gases
- Increase oxygen for combustion
- Cool structural members
Answer: B
Rationale: Ventilation improves visibility and conditions.
7.Which hose stream provides maximum reach?
- Fog pattern
- Broken stream 3 / 4
- Straight stream
- Solid stream on low pressure
Answer: C
Rationale: Straight streams have superior reach and penetration.
8.When extending a ground ladder, which safety action is required?
- Position heel toward fire
- Lock dogs before climbing
- Tie off halyard after climbing
- Face away from ladder base
Answer: B
Rationale: Dogs secure the ladder sections and prevent retraction.
9.Which ICS position is responsible for establishing incident objectives?
- Operations Section Chief
- Safety Officer
- Incident Commander
- Public Information Officer
Answer: C
Rationale: Only the Incident Commander sets objectives.
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