Shop Information (SI)
Shop Information is an ASVAB subtest that tests knowledge of tools, shop practices, woodworking, metalworking, and building materials. On the CAT-ASVAB it is a separate subtest; on the paper version it is combined with Auto Information as Auto & Shop (AS).
Exam Tip
SI tests tools and shop practices. Separate on CAT-ASVAB, combined with Auto on paper version. NOT part of AFQT. Know common tools, fasteners, and safety practices. Nominal lumber sizes differ from actual.
What is the Shop Information Subtest?
Shop Information (SI) measures your knowledge of common tools, shop practices, building materials, and basic construction and repair procedures. It assesses practical, hands-on knowledge.
Subtest Details
| Feature | CAT without tryouts | Paper enlistment |
|---|---|---|
| Questions | 10 | Combined with Auto (25 total AS) |
| Time | 6 minutes | 11 minutes (combined) |
| Format | Separate subtest | Combined as Auto & Shop (AS) |
Topics Covered
| Category | Key Topics |
|---|---|
| Hand Tools | Hammers, wrenches, screwdrivers, pliers, saws |
| Power Tools | Drills, saws, sanders, grinders, lathes |
| Measuring Tools | Rulers, calipers, micrometers, levels |
| Fasteners | Nails, screws, bolts, nuts, rivets, washers |
| Woodworking | Wood types, joints, finishing, cutting techniques |
| Metalworking | Welding, soldering, threading, metal types |
| Building Materials | Lumber sizes, concrete, plywood, drywall |
| Safety | PPE, shop safety rules, tool handling |
Shop and Auto scoring
CAT administers Shop and Auto separately, then reports one combined AS score. The paper enlistment test combines both in one subtest. AS is used in occupational composites such as Air Force Mechanical and is outside the four AFQT subtests.
Study Tips
- Learn to identify common hand and power tools by sight and function
- Know standard fastener types and when to use each
- Understand basic wood joints (butt, miter, dovetail)
- Learn measuring tool reading (tape measure, calipers)
- Study workshop safety practices
- Know nominal vs. actual lumber dimensions (a typical surfaced dry 2x4 measures 1.5" x 3.5")
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