Introduction / Context:
Drawings must communicate both visible and concealed geometry. Hidden lines are a universal drafting convention to indicate features not seen from a particular viewpoint. The question asks whether dashed lines are indeed the accepted representation for hidden features in orthographic views.
Given Data / Assumptions:
- Orthographic views follow a line-type hierarchy: visible, hidden, and center lines.
- Hidden lines are typically short dashes with standard spacing.
- Some model-based definitions may suppress hidden lines on certain views for clarity but the convention remains standard.
Concept / Approach:
The drafting standard assigns different line types to convey different information. Visible outlines take precedence, hidden lines show occluded edges, and center lines show axes or symmetry. Correct use ensures machinists and fabricators understand internal features without sectioning every view.
Step-by-Step Solution:
Identify which edges are not visible from the current view direction.Represent those edges using hidden-line type (dashed).Avoid overuse when a section view communicates better.Maintain line precedence so visible edges override coincident hidden lines.
Verification / Alternative check:
Consult any standard legend of line types; hidden equals dashed with specified pattern.
Why Other Options Are Wrong:
Incorrect: Would contradict widely accepted practice.Only for architectural elevations / Used only when scale is reduced: Hidden-line convention spans mechanical, civil, and architectural drawings regardless of scale.
Common Pitfalls:
Letting hidden lines clutter views when a sectional view would be clearer.Using incorrect dash spacing or line weight so hidden lines resemble center lines.
Final Answer:
Correct
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