Firefighter I Certification Exam Practice

Firefighter I Certification Exam Practice Test Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of a fire department's chain of

command?

• To reduce staffing needs
• To establish clear authority and accountability
• To eliminate the need for training
• To improve public relations

Rationale: A chain of command ensures that responsibilities and

authority are clearly defined, improving efficiency and safety during operations.

• Which type of fire extinguisher is appropriate for electrical fires?
• Water
• Foam 1 / 4

C. CO2

• Wet chemical

Rationale: CO2 extinguishers remove oxygen and do not conduct

electricity, making them safe for electrical fires.

• What is the minimum number of firefighters required to safely

conduct a hose advance?

• 1
• 2
• 3
• 4

Rationale: NFPA standards recommend at least three personnel for a

hose advance: one to operate the nozzle, one to control the hose, and

one for safety.

4. During a structural fire, the "two-in, two-out" rule refers to:

• Two firefighters working outside while two rest
• Two firefighters enter the structure while two remain outside as

backup

• Rotating teams every two hours
• Evacuating civilians in pairs

Rationale: This OSHA and NFPA regulation ensures that firefighters

have immediate backup in case of emergency inside a hazardous environment. 2 / 4

5. The primary function of a hydrant wrench is to:

• Pry doors open
• Open and close fire hydrants
• Cut metal
• Adjust SCBA regulators

Rationale: A hydrant wrench is specifically designed to operate

hydrant valves efficiently.

• Which type of hose line is typically used for initial attack on a

structural fire?

• 1-inch booster line
• 1.5 to 1.75-inch attack line
• 3-inch supply line
• 5-inch relay line

Rationale: Attack lines of 1.5 to 1.75 inches provide sufficient water

flow for interior firefighting while remaining manageable by a small crew.

• Which fire behavior phenomenon involves rapid flame spread across a

ceiling?

• Backdraft
• Flashover
• Smoke explosion
• Rollover 3 / 4

Rationale: Flashover occurs when all combustibles in a compartment

reach ignition temperature almost simultaneously.

• What is the first priority during any emergency response?
• Protect property
• Ensure personal and public safety
• Extinguish fire
• Salvage valuables

Rationale: Life safety is always the highest priority according to NFPA

and incident command principles.

• What is the primary purpose of a personal accountability system on

the fireground?

• Track equipment usage
• Monitor air supply
• Track the location and status of all personnel
• Record incident times

Rationale: A personnel accountability system ensures firefighter safety

by allowing command to quickly locate individuals in dangerous environments.

• Which of the following is considered a class B fire?
• Wood
• Paper
• Flammable liquids
• Electrical equipment
• / 4