Which statement about an automatic transmission apparatus is true?

Which statement about an automatic transmission apparatus is true?

• A. It requires manual gear changes on every shift.
• B. Gears shift automatically.
• C. It cannot shift gears at low speeds.
• D. It uses manual transmission only.

Answer: (B)

Automatic transmission apparatus are designed to shift gears on their own, without the driver having to move a gear lever for each change. It uses hydraulic controls and sensors to decide when to upshift or downshift based on vehicle speed, engine load, and throttle position. The gear ratios themselves are arranged in a planetary gear set, with a torque converter linking the engine to the transmission so smooth transitions can occur as you accelerate or brake. That automatic behavior is why the statement that gears shift automatically is the best answer. This also clarifies why the other ideas aren’t accurate: a manual transmission requires the driver to perform gear changes and operate a clutch; an automatic transmission can operate effectively at low speeds (it can start in a lower gear or downshift as needed); and it is not limited to manual transmission operation.

Automatic transmission apparatus are designed to shift gears on their own, without the driver having to move a gear lever for each change. It uses hydraulic controls and sensors to decide when to upshift or downshift based on vehicle speed, engine load, and throttle position. The gear ratios themselves are arranged in a planetary gear set, with a torque converter linking the engine to the transmission so smooth transitions can occur as you accelerate or brake. That automatic behavior is why the statement that gears shift automatically is the best answer.

This also clarifies why the other ideas aren’t accurate: a manual transmission requires the driver to perform gear changes and operate a clutch; an automatic transmission can operate effectively at low speeds (it can start in a lower gear or downshift as needed); and it is not limited to manual transmission operation.