Question 202General Subjects - 1st Asst/Chief

The correct answer is B) A dual duct system. A dual duct system is characterized by having a split supply air stream, with one duct carrying cold air and the other duct carrying hot air. This allows the system to provide both heating and cooling simultaneously to the same space by blending the hot and cold air streams as needed. This type of system is well-suited for applications where there are variable heating and cooling loads within a building. The other answer choices are incorrect because: A) A variable air volume system does not have a split supply air stream, C) A terminal reheat system uses a single supply air stream that is reheated locally, and D) A single zone system has a single supply air stream that serves an entire zone.