CPI CPI Material Selection & Quality Standards 2 — Questions and Answers
Question 1: What ASTM standard governs the grading and quality of structural steel shapes used in construction installations?
- ASTM A36 (Correct answer)
- ASTM A123
- ASTM A307
- ASTM A416
Correct answer: ASTM A36
ASTM A36 is the standard specification for carbon structural steel, defining the chemical composition and mechanical properties for plates, shapes, and bars used in construction.
Question 2: When reviewing material data sheets (MDS/SDS), which section contains information about required personal protective equipment?
- Section 2 – Hazard Identification
- Section 5 – Fire-Fighting Measures
- Section 8 – Exposure Controls/PPE (Correct answer)
- Section 11 – Toxicological Information
Correct answer: Section 8 – Exposure Controls/PPE
Section 8 of a Safety Data Sheet specifically covers exposure controls and personal protection, listing recommended PPE such as gloves, respirators, and eye protection.
Question 3: Which plywood rating indicates it is suitable for exterior use where it may be exposed to moisture?
- Interior (INT)
- Exposure 1 (EXP 1)
- Exterior (EXT) (Correct answer)
- Structural 1 (STR 1)
Correct answer: Exterior (EXT)
Exterior-rated plywood uses fully waterproof glue throughout and is manufactured to withstand repeated wetting and drying cycles without delamination.
Question 4: What is the purpose of a listed products directory when selecting materials for a code-compliant installation?
- It provides cost comparisons between manufacturers
- It confirms products meet tested safety and performance standards (Correct answer)
- It lists suppliers approved by the local authority
- It tracks warranty information for installed products
Correct answer: It confirms products meet tested safety and performance standards
A listed products directory (such as those published by UL, ETL, or CSA) confirms that specific products have been independently tested and meet applicable safety standards accepted by building codes.
Question 5: Which conduit material is preferred when installing in areas with high chemical exposure?
- Electrical Metallic Tubing (EMT)
- Rigid Metal Conduit (RMC)
- PVC Schedule 80 conduit (Correct answer)
- Flexible metal conduit (FMC)
Correct answer: PVC Schedule 80 conduit
PVC Schedule 80 conduit is highly resistant to most chemicals and corrosives, making it the preferred choice in chemical plants, wastewater facilities, and similar harsh environments.
Question 6: What does 'AWG' stand for when referring to wire sizing in electrical installations?
- Approved Wire Gauge
- American Wire Gauge (Correct answer)
- Adjusted Weight Grading
- Authorized Wiring Guide
Correct answer: American Wire Gauge
AWG stands for American Wire Gauge, the standardized system used in the US to specify the diameter and current-carrying capacity of electrical conductors.
CPI CPI Material Selection & Quality Standards 2
What ASTM standard governs the grading and quality of structural steel shapes used in construction installations?