NCIDQ IDFX Practice Exam

What feature of a chair contributes to its stability and balance?

1. 5 prong base

2. Rotating seat

3. Height adjustment lever

4. Armrest support

The correct answer is: 5 prong base

A 5 prong base significantly contributes to a chair's stability and balance. This design effectively distributes weight across a larger area, reducing the likelihood of tipping or wobbling. The multiple points of contact with the ground create a more stable foundation, which is especially important in chair designs intended for tasks that require movement, such as office chairs. Other features, while beneficial in their own right, do not directly enhance stability in the same way. For instance, a rotating seat provides ease of movement and access to different areas without requiring the user to stand up, but it does not inherently improve the balance of the chair itself. A height adjustment lever offers ergonomic benefits by allowing the user to set the chair at a comfortable height, but again, it doesn't impact the chair's stability. Armrest support is designed for comfort and can help with posture, but it does not affect the foundational balance of the chair. Thus, the 5 prong base stands out as the primary feature that ensures a chair remains stable and balanced during use.