Free RRT Carpet Construction & Inspection Questions and Answers — Questions and Answers

Question 1: What is the primary purpose of a carpet's primary backing?

To provide cushioning underfoot.
To hold the yarn tufts in place during construction. (Correct answer)
To act as a moisture barrier.
To enhance the carpet's color.

Correct answer: To hold the yarn tufts in place during construction.

The primary backing is the foundational layer of a carpet into which the yarn tufts are inserted during the manufacturing process. Its essential purpose is to securely hold these yarn tufts in place, preventing them from pulling out and ensuring the carpet's structural stability. This initial layer is critical for the overall construction and durability of the carpet.

Question 2: Which of the following carpet construction methods is known for its durability and dense pile?

Woven carpet
Knitted carpet
Tufted carpet (Correct answer)
Fusion-bonded carpet

Correct answer: Tufted carpet

Tufted carpet is the most common and versatile carpet construction method, known for its efficiency and ability to produce a wide range of styles. It achieves its durability and dense pile by mechanically inserting yarn tufts into a primary backing. This method allows for a robust and resilient carpet suitable for various applications, making it a popular choice.

Question 3: What does 'face weight' measure in a carpet?

The thickness of the carpet pad.
The weight of the carpet's backing material.
The weight of the carpet fibers per square yard. (Correct answer)
The total weight of the installed carpet.

Correct answer: The weight of the carpet fibers per square yard.

Face weight measures the actual amount of yarn or fiber material in the carpet pile, specifically the weight of the fibers per square yard, excluding the backing. It is a crucial indicator of carpet quality and durability. A higher face weight generally signifies a denser, more luxurious, and more resilient carpet that can withstand more wear and tear.

Question 4: Which fiber type is most resistant to stains and moisture?

Wool
Olefin (polypropylene)
Nylon (Correct answer)
Polyester

Correct answer: Nylon

Nylon is widely regarded as the most durable and resilient synthetic carpet fiber available. It possesses excellent resistance to stains, abrasion, crushing, and moisture, making it ideal for high-traffic areas. Its strong molecular structure allows it to maintain its appearance and bounce back from compression better than most other fiber types.

Question 5: What is the purpose of a carpet's secondary backing?

To provide decorative patterns.
To add cushioning.
To reinforce the carpet and lock tufts in place. (Correct answer)
To absorb sound.

Correct answer: To reinforce the carpet and lock tufts in place.

The secondary backing is applied to the underside of the carpet after the primary backing and tufts are in place. Its main purpose is to provide additional stability, reinforce the primary backing, and securely lock the yarn tufts even further. This layer significantly contributes to the carpet's overall durability, dimensional stability, and resistance to delamination.

Question 6: Which tool is used to measure carpet pile density?

Moisture meter
Density gauge (Correct answer)
Tape measure
Stain probe

Correct answer: Density gauge

A density gauge is a specialized tool used to measure the compactness of the carpet pile, which is a key factor in determining its quality, durability, and resilience. It quantifies how closely packed the fibers are within a given area. While other tools measure dimensions, the density gauge specifically assesses the fiber density.

Question 7: What is 'delamination' in carpet inspection?

Fading of carpet color.
Separation of carpet layers/backings. (Correct answer)
Uneven pile height.
Stretching of the carpet seams.

Correct answer: Separation of carpet layers/backings.

Delamination in carpet refers to the separation of the carpet's layers, typically the primary backing from the secondary backing, or the pile from the backing. This structural failure can be caused by excessive moisture, improper installation, or manufacturing defects. Delamination compromises the carpet's integrity, leading to bubbling, rippling, and premature wear.

Question 8: Which carpet pile type is most prone to showing footprints and vacuum marks?

Berber
Frieze
Plush (Correct answer)
Loop pile

Correct answer: Plush

Plush carpet, also known as Saxony, features a dense, smooth, and even cut pile where the fibers stand straight up. While luxurious, this uniform surface makes it highly prone to showing footprints, vacuum marks, and shading variations because the fibers are easily compressed and reflect light differently. Other pile types like Berber or Frieze are more forgiving.

Question 9: What should you check for during a carpet seam inspection?

Color matching and seam tightness. (Correct answer)
The brand of the carpet pad.
The installer's signature.
The humidity level in the room.

Correct answer: Color matching and seam tightness.

When inspecting a carpet seam, it is critical to ensure that the two joined carpet sections match perfectly in color, pile direction, and pattern for a seamless appearance. Equally important is checking for seam tightness, meaning the edges are firmly bonded without gaps, fraying, or lifting. These factors determine the quality, durability, and aesthetic appeal of the seam.

Free RRT Carpet Construction & Inspection Questions and Answers

What is the primary purpose of a carpet's primary backing?