Materials and Finishes Flashcards
6 cards from real IDFX practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Materials and Finishes flashcards as text
Which adhesive system for ceramic tile installation is specified when tile is installed over a substrate with expected movement, such as wood subfloors or exterior applications?
Answer: Latex-modified thin-set mortar with an uncoupling membrane
Over substrates subject to movement (wood floors, exterior, radiant heat), ceramic and stone tile require a latex-modified thin-set mortar combined with an uncoupling membrane to allow differential movement without cracking.
What is the primary distinction between woven and tufted carpet construction?
Answer: Woven carpet interlaces pile and backing yarns simultaneously; tufted carpet punches pile yarns into a pre-woven backing
In woven carpet (Wilton, Axminster), pile and backing are created simultaneously on a loom. In tufted carpet (95%+ of U.S. production), needles punch pile yarn through a pre-made primary backing; a secondary backing is typically applied for dimensional stability.
The coefficient of friction (COF) for a floor surface in a wet commercial environment should meet which ANSI minimum threshold per A137.1?
Answer: Dynamic COF (DCOF) of 0.42
ANSI A137.1 (2012 and later) requires a minimum dynamic coefficient of friction (DCOF) of 0.42 for hard surface floor tiles used in wet commercial spaces as measured by the BOT-3000E tribometer using SLS solution.
In specifying gypsum wallboard, which type is required in areas with high humidity such as bathrooms and laundry rooms?
Answer: Moisture-resistant gypsum wallboard (MRGWB)
Moisture-resistant gypsum wallboard (MRGWB), commonly called 'greenboard,' uses a water-resistant gypsum core and paper facing, making it suitable for high-humidity areas (not direct water exposure). Cement board is required for direct water contact.
Which characteristic of a material is described by the term 'hygroscopic'?
Answer: The tendency to absorb and release moisture from the surrounding air
A hygroscopic material absorbs moisture from the air when humidity is high and releases it when humidity drops. Wood, natural fibers (wool, cotton, linen), and unfired clay are hygroscopic, which affects their dimensional stability.
What does the acronym 'ACT' stand for in the context of commercial upholstery fabric specifications?
Answer: Association for Contract Textiles
ACT (Association for Contract Textiles) is the industry organization that establishes performance guidelines and standardized testing requirements for contract/commercial upholstery and drapery textiles.