The gearbox shift range is defined as which of the following statements?

The gearbox shift range is defined as which of the following statements?

• A. The range starts at 65% and ends at 75%.
• B. The range starts at 64% and ends at 76%.
• C. The range starts at 60% and ends at 70%.
• D. The range starts at 70% and ends at 80%.

Answer: (A)

The concept being tested is how a gearbox shift range is defined as a hysteresis window around the shift trigger. In practice, the shift range sets a center point for when a gear change should occur and a tolerance around that center to avoid rapid, repeated gear changes due to small fluctuations. The standard window is centered at 70% with a ±5% tolerance, giving 65% to 75%. This keeps shifts stable and prevents chatter. The other options either shift the center away from the intended point or change the width in a way that would make shifting occur too early, too late, or too inconsistently. That’s why 65% to 75% is the correct definition.

The concept being tested is how a gearbox shift range is defined as a hysteresis window around the shift trigger. In practice, the shift range sets a center point for when a gear change should occur and a tolerance around that center to avoid rapid, repeated gear changes due to small fluctuations. The standard window is centered at 70% with a ±5% tolerance, giving 65% to 75%. This keeps shifts stable and prevents chatter. The other options either shift the center away from the intended point or change the width in a way that would make shifting occur too early, too late, or too inconsistently. That’s why 65% to 75% is the correct definition.