Which of these statements is FALSE with respect to architectural details?

The statement regarding plenum being an attic area is incorrect because "plenum" refers specifically to a space used for air circulation in heating, ventilation, and air conditioning (HVAC) systems, not an attic. In architectural and construction terms, a plenum is typically the area between the structural ceiling and the suspended ceiling, where air ducts and other components can be installed to facilitate proper air flow. This distinction is crucial in understanding HVAC systems and their design within building structures.

The other statements correctly describe architectural terms. A soffit is indeed a section of ceiling that is lowered to create a visually appealing feature or to conceal ducts and wiring. The terms "rise" and "run" are used in reference to slopes, such as roof pitches or stairs, indicating how steep a plane is. Joists and studs are essential components of framing, with joists typically supporting floors or ceilings, and studs supporting walls. Each of these definitions plays a vital role in architectural design and construction.