Hatching angles in CAD: Setting the ANSI 131 hatch pattern to an angle of 45° will orient hatch lines at 45°, not vertically. Judge the statement.

Introduction / Context:
Section lining (hatching) conveys cut material and separates parts visually. In CAD systems, a hatch pattern has a base orientation, scale, and angle. Understanding angle behavior avoids misleading graphics that can confuse readers or violate standards.

Given Data / Assumptions:

• ANSI 131 is a common general-purpose hatch pattern used to indicate cut areas (often a series of evenly spaced lines).
• Hatch angle specifies the rotation of the hatch lines relative to the current drawing orientation (UCS) or paper space.
• Vertical orientation corresponds to an angle of 90° (or 270°), not 45°.

Concept / Approach:
If a pattern consists of straight, parallel lines, the hatch angle rotates those lines accordingly. A 45° entry means the lines incline diagonally at 45° to the reference axis; it does not convert them to a vertical direction. Vertical hatch would require an angle that aligns with the Y-axis (typically 90°).

Step-by-Step Solution:
Define references: 0° produces horizontal lines; 90° produces vertical lines.Apply 45°: lines rotate half-way between horizontal and vertical.Compare with the claim: the claim equates 45° with vertical.Conclude mismatch: the claim is incorrect.

Verification / Alternative check:
Create a test rectangle and apply ANSI 131 with angles of 0°, 45°, and 90° to visually confirm orientations. Only 90° appears vertical.

Why Other Options Are Wrong:
“Correct” contradicts CAD geometry. Adding conditions such as projection method, UCS dependency alone, or rotating the plot does not fix the statement’s core error; the numeric angle controls the hatch direction directly.

Common Pitfalls:
Confusing hatch angle with view rotation, forgetting that plotting rotation or viewport rotation changes the visual result but not the definition of the input angle itself.

Final Answer:
Incorrect