From a properly constructed primary auxiliary view, a secondary auxiliary view can be created to reveal true size/length of features still foreshortened. Decide whether this statement is correct.

Introduction / Context:
When an edge or plane is oblique (inclined to more than one principal plane), a single auxiliary may not be enough to show true size. A secondary auxiliary resolves the remaining foreshortening by projecting again from the primary auxiliary. We test the correctness of that workflow.

Given Data / Assumptions:

• Primary auxiliary removes foreshortening about one axis.
• Some features remain inclined after the first rotation.
• Secondary auxiliary is built from the primary, not from a principal view.

Concept / Approach:
Each auxiliary effectively “rotates” the object relative to a viewing plane. Two successive rotations (primary then secondary) can align an oblique feature parallel to the viewing plane, yielding true size/length necessary for dimensioning and inspection.

Step-by-Step Solution:
1) Construct primary auxiliary from a chosen principal view.2) Identify edges/planes still foreshortened.3) Establish a new reference line on the primary auxiliary.4) Project perpendicularly from the primary auxiliary to form the secondary auxiliary where the target feature becomes true.

Verification / Alternative check:
Measuring the feature on the secondary auxiliary matches its computed true length or area, confirming correctness.

Why Other Options Are Wrong:
“Incorrect”: Conflicts with standard descriptive-geometry methods.“Only from principal views” / “Only for cylindrical parts”: Secondary auxiliaries apply broadly to oblique geometry, not a single shape class.

Common Pitfalls:
Placing the second reference line incorrectly; forgetting to keep projectors perpendicular to the new reference line.

Final Answer:
Correct