Red Seal Agricultural Equipment Technician Practice Exam

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What does the term "gear ratio" refer to?

  1. The number of gears on the engine

  2. The size of the engine's belt

  3. The ratio of the number of teeth on two gears that are meshed together

  4. The length of the gear shaft

The correct answer is: The ratio of the number of teeth on two gears that are meshed together

The term "gear ratio" specifically refers to the ratio of the number of teeth on two gears that are meshed together. This ratio is significant because it determines how the speed and torque are transmitted through the gears. When two gears are engaged, the gear with more teeth will rotate slower than the gear with fewer teeth, multiplying the torque if the driven gear is smaller. This principle is fundamental in machinery and vehicles, affecting performance characteristics such as acceleration and towing capacity. Understanding gear ratios is crucial for optimizing equipment operation, enhancing efficiency, and making informed decisions about gear changes in various applications.

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