Architecture and Design Building Materials and Construction 2 — Questions and Answers
Question 1: What is the R-value of a building material a measure of?
- Structural rigidity
- Fire resistance
- Thermal resistance (Correct answer)
- Sound attenuation
Correct answer: Thermal resistance
R-value measures a material's resistance to heat flow; a higher R-value indicates better insulating performance.
Question 2: Which type of masonry unit is most commonly used for interior non-load-bearing partitions?
- Solid brick
- Concrete Masonry Unit (CMU) (Correct answer)
- Natural stone
- Glass block
Correct answer: Concrete Masonry Unit (CMU)
CMUs are lightweight, cost-effective, and widely used for non-load-bearing interior walls in commercial construction.
Question 3: Cross-laminated timber (CLT) is used in construction primarily for:
- Roof flashing
- Mass timber walls, floors, and roofs (Correct answer)
- Window glazing
- Foundation waterproofing
Correct answer: Mass timber walls, floors, and roofs
CLT panels consist of layers of lumber glued at right angles, used as structural wall, floor, and roof panels in mass timber construction.
Question 4: What is the purpose of weep holes in masonry cavity walls?
- Structural ventilation
- Drainage of water from the cavity (Correct answer)
- Air barrier continuity
- Seismic movement accommodation
Correct answer: Drainage of water from the cavity
Weep holes allow water that penetrates the outer wythe or accumulates in the cavity to drain out at the base of the wall.
Question 5: Which insulation material has the highest R-value per inch?
- Fiberglass batt
- Cellulose
- Closed-cell spray polyurethane foam (Correct answer)
- Mineral wool
Correct answer: Closed-cell spray polyurethane foam
Closed-cell spray polyurethane foam has an R-value of approximately R-6 to R-7 per inch, the highest among common insulations.
Question 6: What does 'STC rating' measure in building materials?
- Structural Thermal Coefficient
- Sound Transmission Class (Correct answer)
- Surface Tensile Capacity
- Solar Transmittance Coefficient
Correct answer: Sound Transmission Class
Sound Transmission Class (STC) rates a partition's ability to reduce airborne sound transmission between spaces.
Architecture and Design Building Materials and Construction 2
What is the R-value of a building material a measure of?