Exam DG-CAD-001 / v0.1

Change one thing.
Keep the rest intact.

A six-task parametric editing exam. Make precise revisions to a mounting plate while preserving protected geometry.

Synthetic development setMillimetresBinary rewardNo model scores yet

The working state

Each task starts with a 100 × 60 × 6 mm plate and four 6 mm through-holes. The lower-left corner is (0, 0). The candidate edits a JSON parameter state and may export an OpenSCAD program.

{
  "plate": {
    "width": 100,
    "length": 60,
    "thickness": 6
  },
  "holes": [
    {
      "id": "H1",
      "x": 20,
      "y": 20,
      "diameter": 6
    },
    {
      "id": "H2",
      "x": 80,
      "y": 20,
      "diameter": 6
    },
    {
      "id": "H3",
      "x": 20,
      "y": 40,
      "diameter": 6
    },
    {
      "id": "H4",
      "x": 80,
      "y": 40,
      "diameter": 6
    }
  ]
}

What the grader checks

01Feature IDs are preserved.
02Every requested dimension meets a 0.001 mm tolerance.
03All protected parameters remain unchanged.
04Dimensions are positive; edge and inter-hole clearance is at least 2 mm.

All checks must pass for reward 1. Partial credit is diagnostic only. The grader uses analytic geometry for rectangular extrusions and circular through-holes. It does not execute a CAD kernel, validate arbitrary STEP files, test assemblies or perform FEA.

This public development set is exposed and unsuitable as a sealed evaluation. It uses no enterprise records and makes no claim about training gains or engineering certification.

The six tasks

01 / bore-01

Enlarge one bore

Increase H1 to an 8 mm diameter. Preserve the plate and every other hole, including all centers. All holes must retain at least 2 mm of edge and inter-hole clearance.

02 / center-02

Move a single feature

Move H2 to x = 74 mm. Keep its y coordinate and diameter unchanged. Preserve every other parameter. Maintain 2 mm minimum clearance.

03 / thickness-03

Change the extrusion

Increase plate thickness to 9 mm. Preserve width, length and all through-hole dimensions and centers. Maintain 2 mm minimum clearance.

04 / pattern-04

Revise a four-hole pattern

Set all four hole diameters to 10 mm. Preserve the plate and every hole center. Maintain 2 mm minimum clearance.

05 / pitch-05

Narrow the mounting pitch

Set the x coordinates of H1 and H3 to 25 mm, and H2 and H4 to 75 mm. Preserve all other values. Maintain 2 mm minimum clearance.

06 / paired-06

Combine two independent edits

Increase plate thickness to 8 mm and H4 diameter to 12 mm. Preserve all other dimensions and centers. Maintain 2 mm minimum clearance.

Change one thing.Keep the rest intact.