Firefighter Mechanical Aptitude · Question
Which of the following is a direct application of Bernoulli's principle in firefighting?
Bernoulli's principle states that an increase in fluid speed occurs simultaneously with a decrease in pressure. The venturi effect uses this principle where flu
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Question: Which of the following is a direct application of Bernoulli's principle in firefighting?
Answer options:
- The lift generated by a helicopter rotor.
- The operation of a car's braking system. ✅ The venturi effect used in an eductor to draw foam concentrate.
- The mechanical advantage of a pry bar.
Correct answer: The venturi effect used in an eductor to draw foam concentrate.
Explanation: Bernoulli's principle states that an increase in fluid speed occurs simultaneously with a decrease in pressure. The venturi effect uses this principle where fluid accelerates through a constriction, creating a low-pressure area that can draw in another fluid (like foam concentrate).
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- Scenario 1: Which simple machine uses a fulcrum to multiply force or change the direction of force?
- Scenario 2: If a hydraulic jack has a small piston with an area of 5 cm² and a large piston with an area of 50
- Scenario 3: Which of the following would require the MOST force to move?
- Scenario 4: A rope is tied to a heavy box. Instead of pulling the box directly, a firefighter wraps the rope a
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