CCT Carpet Fiber Identification & Construction 4

Question 1

A customer's carpet turns yellow after cleaning. The most likely cause when the fiber is wool is:

Accepted Answer

Residual alkaline cleaner reacting with wool protein

Answer

Alkaline residue left on wool oxidizes and causes yellowing; wool must always be rinsed to a near-neutral pH to prevent this reaction.

Question 2

Which carpet construction provides the best performance in high-traffic commercial settings?

Accepted Answer

Dense, low-level loop or cut-loop commercial carpet

Answer

Dense, low-level loop or commercial cut-loop carpets resist matting and crushing far better than high-pile constructions in heavy traffic.

Question 3

Triexta (PTT) fiber, used in brands like Mohawk SmartStrand, is derived from:

Accepted Answer

Partially from corn glucose (bio-based feedstock)

Answer

Triexta (PTT) is partially bio-based, with about 37% derived from corn glucose (PDO), distinguishing it from fully petroleum-based synthetics.

Question 4

What is the purpose of the secondary backing on a tufted carpet?

Accepted Answer

To add dimensional stability and improve adhesion for installation

Answer

Secondary backing (usually jute or action-bac polypropylene) is laminated to the primary backing to add stability, stiffness, and better bond for adhesive installation.

Question 5

Which test best identifies silk carpet fiber in the field?

Accepted Answer

Burn test — silk burns slowly, smells like hair, leaves crushable ash, and feels cool to touch when held

Answer

Silk burns like wool (protein fiber), smelling of burning hair with a crushable ash, and has a characteristic cool, smooth feel that helps distinguish it from synthetics.

(CCT) Carpet Cleaning Technician Certified Practice Test

(CCT) Carpet Cleaning Technician Certified Practice Test

CCT Carpet Fiber Identification & Construction 4