Assembling Objects
What to know
Assembling Objects tests spatial visualization, not shop knowledge. Two formats dominate: choosing which pieces will join to form a target shape, and choosing which completed figure results when the given pieces are rotated and connected. Pieces are drawn in different orientations, so you must rotate them mentally.
Method: find a distinctive feature on each piece, such as an angled cut, notch, tab, hole, or curved edge, and match it to the target. Work one connection at a time, and eliminate a choice the moment a feature fails to line up.
Traps
- Mirror images. A piece that looks rotated but is actually flipped is almost always wrong. Rotation preserves the arrangement of features; reflection reverses it.
- Pieces that differ in size or proportion from the target.
- Overlapping parts drawn so they appear to share a single edge.
- Pieces that fit individually but overlap or leave a gap once joined.
Rule of thumb
Track one landmark, such as the corner with the notch, and follow where it lands after rotation. If the notch ends up on the wrong side of the joined figure, the choice is a reflection and must be rejected.
Worked example
An L-shaped bracket has a hole near the inside corner, but the target shows the hole at the outside. Any choice that keeps the hole near the inside corner is a mirror image, so discard it. The correct answer is the version rotated 180 degrees, which moves the hole to the outside while preserving the shape.