JCE Technical Drawing case studies
JCE Technical Drawing · Put your knowledge to work in context.
The Junior Certificate Technical Drawing examination is a school-level graphics subject assessment taken in Ireland, typically by students near the end of the junior cycle. It suits candidates who are comfortable working precisely with drawing instruments and who want to show that they can read a written brief, plan a layout on the sheet, and produce accurate construction work under time. The JCE Technical Drawing case studies are 5 cases and about 4,838 words.
1Corner Arc and Pitch-Circle Set-Out on a Link Plate
A small fabrication shop is producing a 180 mm × 120 mm link plate from 6 mm mild steel. The profile has two straight edges meeting at 50° at vertex A, and a 35 mm radius corner arc that must blend tangentially into both edges.
966 words, about 5 min2Missing Projection Symbol: Boss Mirrored and Countersinks Reversed
A UK subcontractor receives an A3 print of a cast bearing housing from an overseas customer. The sheet is cropped along the top edge, so the projection symbol is missing.
968 words, about 5 min3Choosing and Correcting a Pictorial for a Maintenance Manual
A maintenance manual for a water-treatment plant needs one illustration of a clamp block: 80 mm long, 50 mm wide and 30 mm high, with a Ø20 mm through-hole in the 80 × 50 front face, a 15 mm wide slot milled 6 mm deep into the top face at 30° to the long edge, and a 5 mm × 45° chamfer on the top front edge. The illustrator has supplied a cabinet oblique with the receding axis at 45° but drawn at full depth, and has drawn the Ø20 hole as a true circle on the front face.
956 words, about 5 min4Rib Hatching and Sectioning Conventions on a Cast Bracket
A pattern shop is checking a drawing of a cast-iron bracket before making the pattern. The bracket is a 160 × 90 × 20 flat base, a vertical plate 20 mm thick standing on the base at one end, and a 12 mm thick triangular rib bracing the plate at mid-length.
945 words, about 5 min5Branch Pipe Development and the Hole in the Main
A ductwork firm is prefabricating a 90° branch for a ventilation system: a Ø60 branch pipe meets a Ø100 main pipe at 90°, both axes intersecting, both 1.2 mm galvanised sheet. The branch is 120 mm long, measured from the main pipe axis to its free end.
1,003 words, about 5 min