Firefighter Mechanical Aptitude · Question
A small gear (10 teeth) drives a large gear (40 teeth). The large gear turns:
Driven speed = driver × (driver teeth / driven teeth) = 1 × (10/40) = 1/4.
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Question: A small gear (10 teeth) drives a large gear (40 teeth). The large gear turns:
Answer options:
- 4× as fast
- ½× as fast ✅ ¼× as fast
- Same speed
Correct answer: ¼× as fast
Explanation: Driven speed = driver × (driver teeth / driven teeth) = 1 × (10/40) = 1/4.
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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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