Architecture Construction Materials and Methods 2 — Questions and Answers
Question 1: What is a 'construction joint' in concrete work?
- A joint designed to allow planned cracking from thermal movement
- A planned interruption in a concrete pour where fresh concrete is later cast against hardened concrete (Correct answer)
- A gap left between adjacent precast panels for differential settlement
- A saw-cut joint made after concrete placement to control cracking
Correct answer: A planned interruption in a concrete pour where fresh concrete is later cast against hardened concrete
Construction joints are intentional stopping points in concrete pours; proper roughening and treatment of the hardened surface ensures bonding with the next pour.
Question 2: Which type of glass offers the best resistance to thermal breakage in a curtain wall application?
- Annealed glass
- Tempered (heat-strengthened) glass (Correct answer)
- Laminated glass
- Wired glass
Correct answer: Tempered (heat-strengthened) glass
Tempered glass is heat-treated to induce surface compression, making it 4–5 times more resistant to thermal stress and impact than annealed glass.
Question 3: What is 'EIFS' (Exterior Insulation and Finish System) primarily composed of?
- Brick veneer on metal studs with continuous mineral wool insulation
- A continuous insulation board, reinforced base coat, and finish coat applied over a substrate (Correct answer)
- Precast concrete panels with embedded insulation and integral finish
- Metal composite panels (ACM) attached with a pressure-equalized rainscreen cavity
Correct answer: A continuous insulation board, reinforced base coat, and finish coat applied over a substrate
EIFS consists of a polymer-modified base coat reinforced with fiberglass mesh over foam insulation board, topped with a textured finish coat.
Question 4: In structural steel construction, what is 'erection' most accurately defined as?
- Fabrication of steel members in the shop
- Field assembly and temporary or permanent connection of steel members to form the structure (Correct answer)
- Inspection and testing of completed steel connections
- Priming and painting of steel prior to delivery
Correct answer: Field assembly and temporary or permanent connection of steel members to form the structure
Steel erection is the on-site process of hoisting and connecting fabricated steel members into their final positions in the structural frame.
Question 5: Which roofing membrane material is classified as a thermoplastic single-ply system?
- EPDM (ethylene propylene diene monomer)
- Modified bitumen
- TPO (thermoplastic polyolefin) (Correct answer)
- Built-up roofing (BUR)
Correct answer: TPO (thermoplastic polyolefin)
TPO is a heat-weldable thermoplastic membrane widely used for low-slope roofing, offering reflectivity and resistance to UV and ozone.
Question 6: What is the purpose of a 'rainscreen' wall assembly principle?
- To use cladding as the sole waterproof barrier
- To create a pressure-equalized cavity between cladding and the water-resistive barrier to prevent water intrusion (Correct answer)
- To allow water vapor to pass freely through the entire wall section
- To eliminate the need for sealant joints in the cladding
Correct answer: To create a pressure-equalized cavity between cladding and the water-resistive barrier to prevent water intrusion
Rainscreen assemblies use a ventilated cavity and pressure equalization to neutralize the forces that drive water through the cladding, keeping the inner drainage plane dry.
Architecture Construction Materials and Methods 2
What is a 'construction joint' in concrete work?