Timoteo needs to fix an issue in the mixing chamber. What's he most likely working on? A) A dual-duct system B) A central-fan system C) A heating plant D) A cooling plant

Timoteo is most likely working on: **A) A dual-duct system** **Explanation:** A dual-duct system in HVAC (Heating, Ventilation, and Air Conditioning) involves two separate ducts—one delivering heated air and the other delivering cooled air. These two air streams are then combined or mixed in a mixing chamber to achieve the desired temperature within a space. If there's an issue in the mixing chamber, it typically pertains to how these two air streams are being balanced or combined. **Other Options:** - **B) A central-fan system:** Generally involves a central fan distributing air but doesn't specifically focus on mixing different air streams. - **C) A heating plant:** Primarily deals with generating and distributing heat, not necessarily involving a mixing chamber. - **D) A cooling plant:** Focuses on cooling processes, which may not require a mixing chamber unless integrated with a dual-duct approach. Therefore, the presence of a mixing chamber strongly indicates that Timoteo is working on a dual-duct system. **Answer:** A) A dual-duct system