CDT Industry Standards & Compliance Regulations 3 — Questions and Answers
Question 1: Which line type is used to represent hidden edges in a standard orthographic view per ASME Y14.2?
- Dashed (hidden) line (Correct answer)
- Phantom line
- Center line
- Section line
Correct answer: Dashed (hidden) line
ASME Y14.2 specifies that hidden edges are represented by a series of short dashes (hidden lines) on engineering drawings.
Question 2: What does GD&T stand for in engineering drawing practice?
- Geometric Dimensioning and Tolerancing (Correct answer)
- General Drawing and Tolerance
- Graphic Design and Texturing
- Grid Definition and Tracking
Correct answer: Geometric Dimensioning and Tolerancing
GD&T stands for Geometric Dimensioning and Tolerancing, a symbolic language used to define allowable variation in part geometry.
Question 3: In the context of compliance regulations, what does a 'change order' on a construction drawing set typically require?
- Authorization signatures from designated approving parties before implementation (Correct answer)
- Only a verbal agreement between contractor and owner
- An updated materials list submitted to OSHA
- Resubmission of all original drawings
Correct answer: Authorization signatures from designated approving parties before implementation
A change order must be authorized by designated approving parties (typically the owner, architect, and contractor) before changes can be implemented.
Question 4: Which AWS standard governs welding symbols used on engineering drawings?
- AWS A2.4 (Correct answer)
- AWS D1.1
- AWS A5.1
- AWS B2.1
Correct answer: AWS A2.4
AWS A2.4 is the standard that defines the symbols for welding, brazing, and nondestructive examination used on engineering drawings.
Question 5: When a drawing calls out a surface finish of 125 Ra, what does 'Ra' represent?
- Arithmetic average roughness of a surface (Correct answer)
- Radius of curvature at a corner
- Required allowance for machining
- Recommended anodizing thickness
Correct answer: Arithmetic average roughness of a surface
Ra is the arithmetic average of surface roughness deviations measured from the mean line, expressed in microinches or micrometers.
Question 6: Which ASTM standard is commonly referenced for structural steel material specifications in US construction drawings?
- ASTM A36 (Correct answer)
- ASTM C150
- ASTM A307
- ASTM E8
Correct answer: ASTM A36
ASTM A36 is the standard specification for carbon structural steel commonly referenced in structural engineering and construction drawings.
Question 7: What information must typically appear in a drawing's title block per industry standards?
- Drawing number, title, scale, material, revision level, and approval signatures (Correct answer)
- Only the drawing title and date
- The fabricator's name and unit price
- OSHA safety certifications and audit dates
Correct answer: Drawing number, title, scale, material, revision level, and approval signatures
Standard title blocks must include drawing number, title, scale, material specification, revision level, and appropriate approval signatures per ASME Y14.1.
CDT Industry Standards & Compliance Regulations 3
Which line type is used to represent hidden edges in a standard orthographic view per ASME Y14.2?