Craftsman Computer Aided Mechanical Drawing case studies
Craftsman Computer Aided Mechanical Drawing · Put your knowledge to work in context.
Craftsman Computer Aided Mechanical Drawing is a trade-level certification for people who produce mechanical drawings with CAD software - drafters, machinist-technicians, tooling staff, and engineering students who want documented proof that they can turn a part into a clean, standards-compliant drawing set. The exam blends multiple-choice items with drawing and interpretation tasks, so it tests both vocabulary and hands-on output: line conventions and projection rules on one side, layer setup and plotting on the other. The Craftsman Computer Aided Mechanical Drawing case studies are 5 cases and about 4,983 words.
1Pivot bushing: a clearance note the drawing's own fits cannot deliver
You are checking a detail drawing for the pivot joint of a package conveyor. A bronze bushing is pressed into a steel housing: the housing bore is Ø30 H7 (+0.021/0), the bushing OD is Ø30 with a stated interference of 0.015–0.035 mm, and the bushing bore is dimensioned Ø20 H8 (+0.033/0).
882 words, about 4 min2First- or third-angle: a mirrored bracket and a foreshortened 48.5 mm dimension
A cast bracket is designed in Germany and machined at a shop in Ohio. The drawing shows a front view and, placed to the left of it, a second view; there is no projection symbol anywhere on the sheet.
1,000 words, about 5 min3Inherited baseplate set: unresolved xref, substituted font, wrong units, printing construction layer
You inherit the drawing set for a pump baseplate from a departing engineer. On your workstation the title block appears; at the fabricator's it reads 'Xref Unresolved' and the sheet number is blank.
980 words, about 5 min4Section through a ribbed bracket: hatch across ribs, bolt and hole; auxiliary view from the wrong parent
You are reviewing a cast-iron bearing bracket. Section A-A is taken on the vertical centre plane and cuts four triangular ribs lengthwise.
1,067 words, about 5 min5A1 at 1:2 reduced to A3: false scale field, hairline lineweights, 72 dpi logo
You must issue the general arrangement of a conveyor frame to a customer portal as an A3 PDF, and to the fabricator as an A1 PDF. Model space is drawn 1:1 in millimetres and the frame is 1600 mm long.
1,054 words, about 5 min