CCS Building Materials & Systems 3 — Questions and Answers
Question 1: Which roofing membrane type is fully adhered to the substrate and relies on the substrate for dimensional stability?
- Fully adhered single-ply TPO or EPDM membrane (Correct answer)
- Mechanically fastened ballasted EPDM system
- Inverted roof membrane assembly (IRMA)
- Cold-applied built-up roofing (BUR) system
Correct answer: Fully adhered single-ply TPO or EPDM membrane
Fully adhered single-ply membranes are bonded continuously to the substrate, which restrains membrane movement.
Question 2: In glazing specifications, what does the term 'low-e coating' refer to?
- A metallic microsurface coating that reduces long-wave infrared radiation transmission through glass (Correct answer)
- A laminated interlayer that blocks UV light below 380 nm
- A ceramic frit pattern applied by silk screening to reduce visible light transmittance
- An electrostatic tint applied to the glass substrate at the float line
Correct answer: A metallic microsurface coating that reduces long-wave infrared radiation transmission through glass
Low-emissivity (low-e) coatings use thin metallic layers to reflect infrared radiation, improving thermal performance.
Question 3: What is the MasterFormat division that covers concrete?
- Division 03 (Correct answer)
- Division 04
- Division 05
- Division 06
Correct answer: Division 03
MasterFormat Division 03 covers all concrete work including cast-in-place, precast, and specialty concrete.
Question 4: A specifier selects 'Category I' portland cement per ASTM C150. What distinguishes it from 'Category II'?
- Category I cements have no optional performance requirements; Category II cements meet optional sulfate resistance or heat of hydration limits (Correct answer)
- Category I has higher C3S content for faster strength gain than Category II
- Category I requires air-entraining agents; Category II does not
- Category I is limited to Type I cement; Category II covers blended cements only
Correct answer: Category I cements have no optional performance requirements; Category II cements meet optional sulfate resistance or heat of hydration limits
ASTM C150 Category I cements meet mandatory requirements only; Category II cements additionally satisfy optional requirements such as sulfate resistance.
Question 5: What is the primary function of a rainscreen wall assembly?
- To create a pressure-equalized cavity that drains water and prevents it from penetrating the backup wall (Correct answer)
- To reflect solar radiation with a high-albedo exterior cladding
- To provide a continuous rigid insulation layer outside the structural wall
- To absorb moisture in a sacrificial exterior wythe and release it by evaporation
Correct answer: To create a pressure-equalized cavity that drains water and prevents it from penetrating the backup wall
Rainscreen assemblies use a drainage cavity behind the cladding to equalize pressure and drain any water that bypasses the outer face.
Question 6: Which ASTM standard covers the fire test of building construction and materials (the standard furnace test)?
- ASTM E119 (Correct answer)
- ASTM E84
- ASTM E108
- ASTM E1354
Correct answer: ASTM E119
ASTM E119 establishes the time-temperature curve and test protocol for fire endurance ratings of walls, floors, and beams.
Question 7: Fiber-reinforced polymer (FRP) composite materials are typically specified for structural applications where which property combination is most critical?
- High strength-to-weight ratio and corrosion resistance (Correct answer)
- High thermal mass and impact resistance
- Ductility and electromagnetic shielding
- Moisture vapor permeability and dimensional stability
Correct answer: High strength-to-weight ratio and corrosion resistance
FRP composites excel where corrosion resistance and low weight are paramount, such as in chemical-exposure or long-span situations.
CCS Building Materials & Systems 3
Which roofing membrane type is fully adhered to the substrate and relies on the substrate for dimensional stability?