OFAI Study Guide 2026
Everything you need to pass the OFAI exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 OFAI Exam Format at a Glance
📚 OFAI Topics to Study (21)
✍️ Sample OFAI Questions & Answers
1. Water is being pumped through a hose. If the hose diameter is decreased, what happens to the water pressure at the nozzle?
Reducing hose diameter increases water velocity and pressure at the nozzle due to the Venturi effect and conservation of energy.
2. A firefighter must estimate whether a 24-foot ladder will reach a window 20 feet above ground when the base is placed 10 feet from the building. Will the ladder reach?
Using the Pythagorean theorem: reach = √(24² − 10²) = √(576 − 100) = √476 ≈ 21.8 feet, which exceeds the 20-foot window height by about 1.8 feet.
3. If a building has more than 4 floors, it requires a sprinkler system. A building has 6 floors. Which conclusion must be true?
The building has 6 floors, which is more than 4, so the rule directly applies and a sprinkler system is required.
4. Which of the following is typically represented in blue on a standard topographical or city map?
Standard map-making conventions use specific colors for different features to ensure clarity. Blue is universally used to represent hydrography, which includes all forms of water bodies such as rivers, lakes, streams, and oceans.
5. Fires which involve such metals as sodium, magnesium, titanium, aluminum, and uranium are classified as _____________ fires.
Explanation: Class D fires involve combustible metals such as sodium, magnesium, titanium, aluminum, and uranium. These fires require specialized extinguishing agents and firefighting techniques due to the unique properties and challenges associated with combating metal fires. Understanding the classification of fires is crucial for firefighters to effectively respond to and extinguish different types of fire emergencies.
6. If a firefighter exerts 200 pounds of force over a distance of 5 feet to move a door, how much work is done?
Work equals force multiplied by distance: 200 lbs × 5 ft = 1,000 foot-pounds — wait, that is 1,000. Re-check: 200 × 5 = 1,000 foot-pounds.