Introduction / Context:
Engineers use both freehand sketches and CAD drawings. While line quality does differ, professional drawings differ in far more than line appearance. The statement claims the main difference is only line appearance; we must judge whether that is an adequate characterization.
Given Data / Assumptions:
- CAD drawings are typically to scale, precisely dimensioned, and standards-compliant.
- Freehand sketches are used early to convey concepts quickly, often not to scale.
- Both may use similar symbols and annotations, but rigor and traceability differ.
Concept / Approach:
The essential differences include accuracy, scalability, parametric control, layering, standardized styles, title blocks, revision management, and data exchange. These go well beyond how lines look. Therefore, limiting the distinction to line appearance is misleading.
Step-by-Step Solution:
Identify CAD capabilities: constraints, dimensions, standards libraries, layers.Identify sketch limitations: approximate geometry, informal notation.Recognize that compliance, traceability, and manufacturing readiness fundamentally separate CAD drawings from sketches.Conclude the statement is not accurate.
Verification / Alternative check:
Compare a released drawing with revision control against a notebook sketch; only the former is a formal deliverable.
Why Other Options Are Wrong:
Correct: Overstates line appearance and ignores accuracy/standards.Only true for architectural floor plans: Discipline does not change the core distinction.Depends on printer resolution: Output quality does not redefine drawing rigor.
Common Pitfalls:
Treating neat sketches as substitutes for controlled drawings.Assuming a clean line weight guarantees standards compliance.
Final Answer:
Incorrect
Discussion & Comments