Building Materials & Systems Flashcards
7 cards from real CCS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Building Materials & Systems flashcards as text
When specifying resilient flooring, what does 'wear layer thickness' indicate in luxury vinyl tile (LVT)?
Answer: The clear protective top layer depth that determines durability and abrasion resistance
Wear layer thickness (measured in mils) determines how long LVT resists scratching, scuffing, and heavy traffic before the decorative layer is exposed.
What is 'creep' in the context of structural materials?
Answer: Time-dependent deformation under sustained load without additional stress increase
Creep is the slow, permanent deformation that occurs in materials like concrete, wood, and polymers under long-term constant stress.
What does the 'STC' rating of a partition assembly measure?
Answer: Sound Transmission Class — a single-number rating of airborne sound isolation between spaces
STC (Sound Transmission Class) rates how well a building partition attenuates airborne sound; higher numbers indicate better isolation.
Which sealant joint design principle establishes that joint width should be how many times the anticipated movement?
Answer: Joint width should be a minimum of 4 times the anticipated movement
Properly designed sealant joints are sized so the sealant operates within 25% extension/compression, requiring a joint width of at least 4× movement.
What is the key difference between 'tempered' and 'laminated' safety glazing?
Answer: Tempered glass breaks into small cubes; laminated glass holds together with a plastic interlayer when broken
Tempered glass is heat-treated to shatter into small, relatively harmless pieces; laminated glass uses a PVB or SGP interlayer to hold fragments in place after breakage.
In specifying exterior insulation and finish systems (EIFS), what is the purpose of the base coat and reinforcing mesh?
Answer: To provide impact resistance and crack control over the insulation board before the finish coat is applied
The fiberglass reinforcing mesh embedded in the base coat distributes impact loads and controls cracking in the EIFS assembly.
What property of concrete is measured by the slump test (ASTM C143)?
Answer: Workability and consistency of fresh concrete
The slump test measures the subsidence of a fresh concrete cone, indicating its workability and water-cement ratio compliance.