CCS Materials Selection 2 — Questions and Answers
Question 1: Which ASTM standard governs the standard specification for portland cement?
- ASTM C150 (Correct answer)
- ASTM C33
- ASTM C94
- ASTM C387
Correct answer: ASTM C150
ASTM C150 is the Standard Specification for Portland Cement, covering eight types of hydraulic cement.
Question 2: A specifier selecting reinforcing steel for a project in a coastal environment should prioritize which material property above all others?
- Corrosion resistance (Correct answer)
- Tensile strength
- Ductility
- Weldability
Correct answer: Corrosion resistance
Coastal environments expose steel to chloride-laden air, making corrosion resistance the primary selection criterion to ensure long-term durability.
Question 3: When specifying stone veneer for exterior cladding, which property is most critical in freeze-thaw climates?
- Absorption rate (Correct answer)
- Compressive strength
- Surface finish
- Coefficient of thermal expansion
Correct answer: Absorption rate
Low water absorption limits moisture intrusion and reduces the risk of spalling caused by freeze-thaw cycling within the stone.
Question 4: Which document type best communicates mandatory material performance requirements to a contractor without dictating the specific product brand?
- Performance specification (Correct answer)
- Proprietary specification
- Descriptive specification
- Reference standard specification
Correct answer: Performance specification
A performance specification defines required end-result criteria, allowing any product that meets those criteria to be used.
Question 5: A Life Cycle Assessment (LCA) of a building material primarily evaluates which aspect?
- Environmental impacts from raw material extraction through end-of-life disposal (Correct answer)
- Initial installed cost versus replacement cost
- Fire resistance rating over the building lifetime
- Maintenance frequency and associated labor costs
Correct answer: Environmental impacts from raw material extraction through end-of-life disposal
An LCA quantifies environmental burdens—energy, emissions, waste—across every stage of a product's life from cradle to grave.
Question 6: Which roofing membrane material is characterized by outstanding UV resistance and is commonly specified for low-slope roofs in high-sun climates?
- TPO (Thermoplastic Polyolefin) (Correct answer)
- EPDM (Ethylene Propylene Diene Monomer)
- Modified bitumen APP
- Built-up roofing (BUR)
Correct answer: TPO (Thermoplastic Polyolefin)
TPO membranes have excellent UV and ozone resistance and their reflective white surface reduces heat gain, making them well-suited for sunny climates.
Question 7: In CSI MasterFormat, where would a specifier typically place the specification section for structural steel fabrication?
- Division 05 – Metals (Correct answer)
- Division 03 – Concrete
- Division 06 – Wood, Plastics, and Composites
- Division 07 – Thermal and Moisture Protection
Correct answer: Division 05 – Metals
Division 05 covers metals, including structural steel framing and fabrication sections under MasterFormat.
CCS Materials Selection 2
Which ASTM standard governs the standard specification for portland cement?