Firefighter I & II Practice 20 practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q11Which weather condition most significantly affects the drying rate of forest floor fuels, which gain all their moisture from precipitation?
✓ Correct answer: D. Temperature
Answer: Temperature Temperature is the weather condition that most significantly affects the drying rate of forest floor fuels. Higher temperatures lead to increased evaporation, reducing the moisture content of the fuels. Relative humidity affects the moisture that fuels gain from the air. Wind supplies fresh air that speeds up combustion, while sunshine duration can contribute to drying, but temperature remains the most critical factor.
Q12You are dispatched to a structure fire involving electrical equipment. The building's electrical system is still energized. What is the first consideration you should make as you prepare to enter the scene?
✓ Correct answer: B. Ensure the power to the building is shut off and verify it is de-energized
Answer: Ensure the power to the building is shut off and verify it is de-energized. When dealing with electrical fires, ensuring that the power supply is cut off is critical to prevent electrical shock hazards. Making the scene safe for entry is the priority before addressing other concerns. Assessing the extent of the fire, determining the need for additional units, and establishing a water supply are all important steps, but they should be done after ensuring the scene is safe from electrical hazards.
Q13What type of fuel source is suitable for using a $$CO_{2}$$ fire extinguisher?
✓ Correct answer: A. Class B & C
Answer: Class B & C A $$CO_{2}$$ fire extinguisher is suitable for use on Class B and Class C fires. Class B fires involve flammable liquids such as gasoline, oil, and grease. Class C fires involve electrical equipment such as motors, transformers, and appliances. $$CO_{2}$$ extinguishers work by displacing oxygen and removing the heat from the fire, making them effective on liquid and electrical fires but unsuitable for Class A fires which involve solid combustibles like wood and paper.
Q14Which of the following is not a common material used for fire-resistant barriers in buildings?
✓ Correct answer: D. Plastic
Answer: Plastic Plastic is not commonly used for fire-resistant barriers because it tends to melt and burn quickly, unlike materials such as gypsum board, concrete, and fire-rated glass, which are designed to withstand high temperatures and slow the spread of fire.
Q15In structural firefighting, which of the following best describes the term "backdraft"?
✓ Correct answer: B. A rapid increase of fire intensity due to the sudden influx of oxygen.
Answer: A rapid increase of fire intensity due to the sudden influx of oxygen. A backdraft occurs when a fire in a confined space consumes most of the available oxygen, leading to a smoldering state. When more oxygen is suddenly introduced, such as when a door or window is opened, the fire can reignite explosively. The controlled application of water to the base of the fire is a general firefighting technique aimed at extinguishing the flames. Ventilating smoke from a structure is typically achieved through mechanical means or strategic openings, such as windows, but is not directly related to the occurrence of a backdraft. Cutting a hole in the roof to allow heat to escape is a ventilation technique known as vertical ventilation, used to reduce heat and improve conditions for firefighters but does not pertain to the backdraft phenomenon.
Q16Which of the following is not a type of fire stream pattern used in firefighting?
✓ Correct answer: A. Tree stream
Answer: Tree stream The three main types of fire stream patterns used in firefighting are: Type of Stream Description Solid stream A powerful stream directed at a specific point, used for high impact. Fog stream A stream of water that is broken into small droplets, used to absorb heat and protect firefighters. Broken stream A stream composed of separate streams or drops, useful for specific firefighting tasks that require a wide coverage.
Q17Why might a straight stream nozzle be preferred over a fog nozzle in certain firefighting scenarios?
✓ Correct answer: D. A straight stream nozzle provides greater penetration power compared to a fog nozzle
Answer: A straight stream nozzle provides greater penetration power compared to a fog nozzle. The advantage of straight stream nozzles is their ability to penetrate deeper into the fire, which is particularly useful in certain high heat conditions or when needing to reach the seat of the fire.
Q18What is positive-pressure ventilation (PPV)?
✓ Correct answer: A. The use of a fan or blower to force fresh air into a structure, pushing smoke out through designated openings.
Answer: The use of a fan or blower to force fresh air into a structure, pushing smoke out through designated openings. Positive-pressure ventilation (PPV) is ventilation accomplished by using high-powered fans or blowers to introduce fresh air into a compartment, which allows smoke and combustion gases to be pushed out through controlled openings.
Q19What is a hydra-ram used for during firefighting operations?
✓ Correct answer: C. Create a forcible entry by spreading apart a door or window frame
Answer: Create a forcible entry by spreading apart a door or window frame A hydra-ram is a hydraulic forcible entry tool designed to spread apart door or window frames to allow entry. This tool is highly effective in tight spaces and can be operated by a single firefighter. Shutting off utility gas valves is typically done using a gas shut-off tool. Breaking reinforced glass windows requires tools like halligan bars or sledgehammers. Controlling electrical breakers generally requires specific tools for electrical operations.
Q20Which tool is specifically designed to cut through the roof of a building for ventilation purposes?
✓ Correct answer: B. Power saw
Answer: Power saw A power saw is designed to cut through the roof of a building for ventilation. It is an essential tool in firefighting for creating openings to allow smoke and hot gases to escape. A hydraulic spreader is used for prying and spreading during rescue operations, not for ventilation. A K-tool is used for pulling lock cylinders, and a shove knife is used to depress the latch of an outward swinging door.
Use the free Firefighter I & II Practice 20 sample, download the PDF, then unlock web-based timed mock exams for a full exam rehearsal.
Theory