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-ASVAB | Paper ASVAB |
|---|---|---|
| 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 |
SI in Line Scores
| Composite Score | Uses SI (or AS)? |
|---|---|
| CO (Combat) | Yes |
| GM (General Maintenance) | Yes |
| MM (Mechanical Maintenance) | Yes |
| OF (Operators/Food) | Yes |
| ST (Surveillance/Comm) | Yes |
| AFQT | No |
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 (2x4 = 1.5" x 3.5")
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Related Terms
Armed Services Vocational Aptitude Battery (ASVAB)
The ASVAB is a multiple-aptitude test administered by the U.S. Department of Defense to determine qualification for military enlistment and job placement across all branches. It consists of 10 subtests covering verbal, math, science, and technical domains.
Auto Information (AI)
Auto Information is an ASVAB subtest that tests knowledge of automotive systems including engines, transmissions, brakes, electrical systems, and basic vehicle maintenance and repair.
Mechanical Comprehension (MC)
Mechanical Comprehension is an ASVAB subtest that tests understanding of basic mechanical and physical principles, including simple machines, force, energy, fluid dynamics, and structural support concepts.
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