CD Drafter Structural & Mechanical Systems Flashcards

A drafter is detailing a mechanical gear assembly. Which view best shows internal tooth geometry that is otherwise hidden?

Answer: Full section view

A full section view cuts through the center of the assembly to reveal internal features like gear teeth, bores, and keyways.

On a structural steel framing plan, a column is typically represented by:

Answer: A filled or outlined square or rectangular symbol at the grid intersection

Columns are shown as squares or rectangles (representing their cross-section) centered on grid line intersections in plan view.

What is the primary difference between a detail drawing and an assembly drawing?

Answer: A detail drawing shows one individual part with full dimensions; an assembly drawing shows how multiple parts fit together

Detail drawings fully dimension and specify a single part for fabrication, while assembly drawings show the relationships and fit between multiple parts.

Which fastener is represented by a symbol showing two parallel lines crossing a thread note on a drawing?

Answer: A stud bolt

Stud bolts are headless threaded fasteners that are screwed into a tapped hole on one end and accept a nut on the other end.

In mechanical systems drafting, a dashed box drawn around a group of components on a schematic indicates:

Answer: A system boundary or a sub-assembly treated as a single unit

A dashed boundary on a schematic groups related components into a defined subsystem or module for clarity and reference.

A drafter must show both an elevation view and a plan view of a structural frame. The elevation view is primarily used to show:

Answer: Vertical dimensions, member heights, and beam-to-column connections

Elevation views show the vertical face of a structure, including story heights, beam elevations, and vertical connection details.