Sectional Views & Auxiliary Views Flashcards

What is the primary purpose of a sectional view in technical drawing?

Answer: To reveal internal features that would otherwise be hidden

Sectional views cut through an object to expose interior features that would appear as confusing hidden lines in standard orthographic views.

Which line type represents the cutting plane in a sectional view per ASME standards?

Answer: A thick alternating long-and-short dash line with arrows indicating the direction of sight

The cutting plane line is a thick line of alternating long and short dashes with arrowheads at the ends indicating the viewing direction into the section.

In a full section view, how does the cutting plane pass through the object?

Answer: It passes completely through the object along one axis, exposing the full interior

A full section passes the cutting plane entirely through the object along one axis, typically along a center line, to expose the full interior cross-section.

What is the standard angle for section lines (hatch lines) in a technical drawing per ASME convention?

Answer: 45°

Per ASME standards, section lines are typically drawn at 45° to the horizontal unless the part's outline itself is at or near 45°, in which case a different angle is used.

In a half-section view, what is shown on each side of the cutting plane line?

Answer: One half shows the sectioned interior and the other shows the unsectioned exterior

A half-section divides a symmetrical object along its center line, showing the interior (sectioned) on one side and the uncut exterior on the other.

A broken-out section is best described as:

Answer: A small portion of an object's interior revealed by an irregular freehand break line

A broken-out section uses a short, irregular break line to expose only a limited interior area of an object without the need for a full or half section.

How is a revolved section created?

Answer: The cross-section is rotated 90° into the plane of the view and superimposed directly onto the longitudinal view

A revolved section is formed by rotating the cross-sectional shape 90° into the plane of the longitudinal view and drawing it directly on that view in place.