Sectional Views & Auxiliary Views Flashcards
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Read the first 7 Sectional Views & Auxiliary Views flashcards as text
What is an offset section?
Answer: A section that uses a stepped cutting plane to pass through multiple features not in the same plane
An offset section uses a cutting plane that bends or steps to pass through several features lying in different planes, combining them into a single informative section view.
What is a revolved section used for?
Answer: To show the cross-sectional shape of an elongated feature such as a spoke or rib by rotating it 90° in place
A revolved section shows the cross-sectional shape of a long feature like a spoke or handle by rotating the cross-section 90° directly onto the view rather than placing it elsewhere on the sheet.
How does a removed section differ from a revolved section?
Answer: A removed section is placed at a separate location on the drawing rather than rotated in place on the view
While a revolved section is rotated 90° directly on the feature, a removed section is placed at a separate, clearly labeled location on the drawing for better readability.
At what angle are standard general-purpose section lines (hatching) typically drawn?
Answer: At 45° to the principal lines of the view outline
Per ANSI/ASME Y14.3, general section lines are drawn at 45° to the principal lines of the view to clearly distinguish cut material without conflicting with horizontal or vertical object lines.
Why are thin features such as ribs and webs typically left unhatched even when the cutting plane passes through them?
Answer: Hatching them would falsely suggest a heavy solid cross-section, misrepresenting their structural role
Leaving ribs and webs unhatched prevents the false impression that they are solid masses, helping readers correctly understand their function as thin stiffening elements.
A primary auxiliary view is projected from which view on a drawing?
Answer: From whichever principal view shows the inclined surface as a true edge (straight line)
A primary auxiliary view is projected perpendicular to the inclined surface from the principal view in which that surface appears as a straight edge, ensuring the true shape is captured.
What is the purpose of a partial auxiliary view?
Answer: To show only the inclined surface and adjacent features, omitting information already clear in principal views
A partial auxiliary view shows only the true-shape portion of the inclined feature, deliberately excluding parts of the projection that duplicate information already shown in the principal views.