Chapter 8 Key Terms

aligned section	(n) A section view created by bending the cutting plane line to pass through an angled feature. The resulting section does not show the section in true projection, yet it gives the clearest possible representation of the features. (See 462)
assembly section	(n) A section view of multiple parts in an assembly. Differing section line designs differentiate between different materials, or between similar materials belonging to different parts. (See 457)
auxiliary section	(n) A section view derived from an auxiliary view. The term distinguishes from section views derived from standard orthographic views. (See 457)
broken-out section	(n) A section view used to reveal interior features of a part by breaking away a portion of the object. A broken-out section is often used instead of a half or full section view when the feature of interest is not symmetrical with the overall object. The result is a more efficient drawing. Unlike most other section views, a cutting plane line is not defined in an adjacent view. (See 453)
conventions	(n) Commonly accepted practices, rules, or methods. In technical drawing, a convention is the use of dashed lines to designate a feature hidden from the current viewpoint. (See 465)
cross-hatch lines	(n) An alternate term for section lines. Cross-hatch often refers to section line symbols in which the lines cross each other rather than simply running parallel to each other. (See 448)
cutting plane lines	(n) Aline showing the location of a cutting plane in section drawings. The cutting plane line is drawn in the view for which the line of sight is parallel to the cutting plane. Arrows on the ends of the section line point toward the material to be retained in the corresponding section view. (See 445)
full section	(n) A sectional view generated by passing a single cutting plane completely through the object. (See 452)
general-purpose section line	(n) A default section line symbol used to indicate the cut surface of a sectional view. This symbol is used to represent cast iron, or an anonymous material if none is defined. (See 449)
half section	(n) A section view generated by passing a cutting plane halfway through an object. The result depicts half the view sec-tioned. (See 452)
offset section	(n) Afull section view generated by multiple, connected cutting planes that are parallel but not coplanar. This technique is used to allow the cutting planes to pass through a series of features that do not all lie in the same plane. (See 456)
removed section	(n) A section view that does not follow the standard alignment of views practiced in multiview drawing. This technique is used to show multiple section views generated from parallel cutting planes and views placed on separate drawings or using different scales. (See 454)
revolved section	(n) A section view made by revolving the cross-section view of the part 90 degrees and placing the section view on the part. Visible lines adjacent to the revolved view can be either drawn or broken out using conventional breaks. (See 454)
rib (web)	(n) A thin, flat feature of an object that acts as a structural support. Ribs, webs, spokes, lugs and other thin features are not section lined if a cutting plane passes parallel to the feature. (See 461)
section drawings	(n) Drawings containing views in which portions of the object have been removed. Section drawings typically depict the cutting plane used to define the removed material in a view adjacent to the actual section view. The section view depicts the cut surfaces with section line symbols. (See 441)
section lines	(n) A line used to represent surfaces of an object cut by a cutting plane in section views. Section lines are drawn in a number of patterns (symbols) corresponding to the type of material being sectioned. (See 448)