Firefighter Mechanical Aptitude · Question
A screw is essentially which two simple machines working in combination?
A screw is fundamentally an inclined plane wrapped around a cylinder, with a wedge-like tip.
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Question: A screw is essentially which two simple machines working in combination?
Answer options:
- Lever and pulley
- Wheel and axle, and wedge
- Inclined plane and wedge ✅ Inclined plane wrapped around a cylinder
Correct answer: Inclined plane wrapped around a cylinder
Explanation: A screw is fundamentally an inclined plane wrapped around a cylinder, with a wedge-like tip.
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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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