NCIDQ IDFX 2026 – 400 Free Practice Questions to Pass the Exam

The correct statement regarding the fire properties of cotton fabric is that cotton burns continuously once ignited. Cotton is a natural fiber that is highly flammable, and once it catches fire, it does not self-extinguish or resist burning. This means that it will continue to burn until the combustion source is removed or it runs out of fuel.

Cotton's combustion characteristics can lead to hazardous situations, particularly in environments where fire safety is critical. Understanding these properties is essential for interior designers and related professionals when selecting materials for building interiors, as they need to prioritize safety and compliance with fire codes.

In contrast, while cotton can be treated with chemical fire retardants to enhance its resistance to ignition, this does not change its inherent flammability properties. Therefore, the other options incorrectly represent the nature of untreated cotton fabric in terms of fire behavior.