CDT Industry Standards & Compliance Regulations 2 — Questions and Answers
Question 1: Which ASME standard governs dimensioning and tolerancing practices used in engineering drawings?
- ASME Y14.5 (Correct answer)
- ASME B16.5
- ASME Y14.100
- ASME B31.1
Correct answer: ASME Y14.5
ASME Y14.5 is the standard that establishes uniform practices for dimensioning and tolerancing in engineering drawings.
Question 2: What does the term 'datum' refer to in ASME Y14.5?
- A theoretically exact point, axis, or plane used as a reference for measurements (Correct answer)
- A type of surface finish callout
- A tolerance zone for form errors
- A drafting symbol indicating north orientation
Correct answer: A theoretically exact point, axis, or plane used as a reference for measurements
A datum is a theoretically exact geometric reference (point, axis, or plane) from which measurements and tolerances are established.
Question 3: When a drawing references ANSI/ASME standards, who is typically responsible for ensuring the drawing conforms to those standards?
- The checker or approving engineer (Correct answer)
- The end customer only
- The material supplier
- The shipping department
Correct answer: The checker or approving engineer
The checker or approving engineer is responsible for verifying that drawings conform to the referenced standards before release.
Question 4: Which organization publishes the standards commonly used for architectural drawing practices in the United States?
- AIA (American Institute of Architects) (Correct answer)
- ASTM International
- IEEE
- OSHA
Correct answer: AIA (American Institute of Architects)
The AIA publishes standards and guidelines for architectural drawing practices and construction document production.
Question 5: ISO 128 is an international standard that addresses which drafting topic?
- General principles of presentation in technical drawings (Correct answer)
- Material testing and certification
- Welding symbol conventions only
- Electrical wiring diagrams
Correct answer: General principles of presentation in technical drawings
ISO 128 establishes general principles for the presentation of technical drawings including line types, views, and sections.
Question 6: What is the purpose of a title block revision table on an engineering drawing?
- To document changes made to the drawing after initial release (Correct answer)
- To list the materials needed for fabrication
- To indicate the drawing's file storage location
- To provide contact information for the drafting department
Correct answer: To document changes made to the drawing after initial release
A revision table records all changes made to a drawing after its initial release, including revision letter, description, date, and approver.
Question 7: Under ASME Y14.100, what is the primary purpose of an engineering drawing?
- To serve as the definitive product definition conveying all requirements for manufacture and inspection (Correct answer)
- To provide a visual reference only for marketing materials
- To estimate material costs for procurement
- To satisfy ISO certification audits only
Correct answer: To serve as the definitive product definition conveying all requirements for manufacture and inspection
ASME Y14.100 defines engineering drawings as the authoritative product definition used to communicate all requirements for manufacturing and inspection.
CDT Industry Standards & Compliance Regulations 2
Which ASME standard governs dimensioning and tolerancing practices used in engineering drawings?