Architecture and Design Building Materials and Construction 1 — Questions and Answers
Question 1: Which material has the highest tensile strength among common structural materials?
- Timber
- Brick
- Steel (Correct answer)
- Concrete
Correct answer: Steel
Steel has a much higher tensile strength than timber, brick, or unreinforced concrete, making it ideal for tension members.
Question 2: Reinforced concrete combines concrete with steel rebar primarily because:
- Steel adds compression strength
- Steel compensates for concrete's low tensile strength (Correct answer)
- Steel reduces concrete's weight
- Steel prevents thermal expansion
Correct answer: Steel compensates for concrete's low tensile strength
Concrete is strong in compression but weak in tension; steel rebar is embedded to carry tensile forces.
Question 3: What is the primary purpose of a vapor barrier in wall construction?
- To provide structural support
- To prevent moisture migration through the assembly (Correct answer)
- To improve acoustic performance
- To add thermal mass
Correct answer: To prevent moisture migration through the assembly
A vapor barrier controls the movement of water vapor through the wall, preventing condensation and moisture damage.
Question 4: Which roofing material is known for its longevity, often lasting 50+ years?
- Asphalt shingles
- Wood shakes
- Slate (Correct answer)
- Roll roofing
Correct answer: Slate
Slate roofs can last 75–150 years with proper installation and maintenance, far outlasting most other roofing materials.
Question 5: Glulam (glued laminated timber) beams are used primarily for:
- Decorative wall panels
- Long-span structural applications (Correct answer)
- Foundation piles
- Waterproof membranes
Correct answer: Long-span structural applications
Glulam beams are engineered wood products that achieve long spans and complex curves not possible with solid lumber.
Question 6: What does 'w/c ratio' refer to in concrete mix design?
- Width-to-cover ratio
- Water-to-cement ratio (Correct answer)
- Weight-to-compressive ratio
- Wire-to-coarse aggregate ratio
Correct answer: Water-to-cement ratio
The water-to-cement ratio determines concrete strength and durability; a lower w/c ratio generally produces stronger concrete.
Architecture and Design Building Materials and Construction 1
Which material has the highest tensile strength among common structural materials?