Auxiliary Views — Secondary View Orientation Is a secondary auxiliary view always perpendicular to one of the principal views, or is it typically perpendicular to the primary auxiliary view created to show a true shape of an inclined feature?

Introduction / Context:
Auxiliary views help reveal true sizes and shapes of features that are inclined or oblique relative to principal projection planes. A primary auxiliary view is constructed perpendicular to the direction of an inclined feature. Sometimes, even in a primary auxiliary view, another feature remains foreshortened. A secondary auxiliary view is generated from the primary to resolve the remaining inclination. The statement claims that a secondary view is always perpendicular to a principal view, which misrepresents how these views are constructed.

Given Data / Assumptions:

• Principal views are front, top, and side under first angle or third angle projection.
• Primary auxiliary is perpendicular to an inclined line or plane of interest.
• Secondary auxiliary is constructed from the primary auxiliary to remove remaining tilt.

Concept / Approach:
Secondary auxiliary orientation is driven by the geometry of the feature, not by principal planes. Its reference direction is the foreshortened edge in the primary auxiliary. By aligning the secondary auxiliary perpendicular to that edge, the true shape appears. Therefore there is no rule that secondary auxiliaries must be perpendicular to any principal view. They often are not.

Step-by-Step Solution:
1) Identify the inclined feature that is foreshortened in principal views.2) Create a primary auxiliary perpendicular to the feature to show one true dimension.3) If another tilt remains, take a secondary auxiliary perpendicular to the foreshortened edge in the primary.4) Dimension the feature in the view where it is shown true size or true shape.

Verification / Alternative check:
Construct a wedge with an oblique face. A primary auxiliary shows the face more accurately, but edges can remain foreshortened. A secondary auxiliary taken from the primary resolves the shape without any need to align to principal planes.

Why Other Options Are Wrong:
Correct would force alignment to principal views and is false. The other distractors add irrelevant restrictions on complexity or material. Partially correct downplays the general rule.

Common Pitfalls:
Attempting to force all dimensioning back to principal views after creating auxiliaries; forgetting that hidden and visible line conventions still apply in auxiliary projections.

Final Answer:
Incorrect