Firefighter Mechanical Aptitude · Question
Which type of valve is primarily designed to allow fluid flow in only one direction and prevent backflow?
A check valve, or non-return valve, automatically opens with forward flow and closes to prevent flow in the opposite direction.
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Question: Which type of valve is primarily designed to allow fluid flow in only one direction and prevent backflow?
Answer options:
- Ball valve
- Gate valve ✅ Check valve
- Needle valve
Correct answer: Check valve
Explanation: A check valve, or non-return valve, automatically opens with forward flow and closes to prevent flow in the opposite direction.
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Question explanations
- 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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