Auto & Shop Information ASVAB Practice Test
Updated July 2026 · AFQT · 6 min read
Auto & Shop Information Practice Test
Answer each question and get an instant explanation. Your score and estimated performance appear at the end. No sign-up needed.
The Auto & Shop Information (AS) subtest measures what you know about automotive systems and shop practices — engines, brakes, ignition, automotive maintenance, hand and power tools, shop safety, and fasteners. It is one of the nine ASVAB subtests, but it is not part of your AFQT enlistment score, so it only matters for qualifying for specific mechanical and maintenance jobs. On the paper ASVAB you answer about 25 questions in 11 minutes; the computer (CAT-ASVAB) splits it into two shorter, separately timed Auto and Shop sections.
Use the free practice quiz above to test yourself with instant scoring and answer explanations, then read the guide below to fill in any gaps.
What the Auto & Shop Information subtest covers
AS has two halves that share a section. The Auto Information side asks about how a vehicle works, while the Shop Information side asks about building, repairing, and the tools you use to do it.
Auto topics include:
- Engine systems — pistons, cylinders, the four-stroke cycle, and cooling
- Ignition and electrical — spark plugs, the battery, and the alternator
- Brakes — disc vs. drum, brake fluid, and the master cylinder
- Drivetrain — transmission, clutch, and differential basics
- Automotive maintenance — oil, filters, coolant, and tire care
Shop topics include:
- Hand tools — wrenches, screwdrivers, pliers, chisels, and files
- Power tools — drills, grinders, lathes, and saws
- Fasteners — bolts, nuts, screws, rivets, and washers
- Materials and measuring — wood, metal, and reading a caliper or square
- Shop safety — the correct, safe way to use each tool
Which military jobs use your AS score
Because AS is not part of the AFQT, a low score here will not stop you from enlisting — but a strong score opens the door to hands-on career fields. AS feeds branch line scores (composites) such as Mechanical Maintenance, which combine several subtests to qualify you for jobs. It is one of the most useful subtests if you want a technical trade.
Career fields that often lean on AS include:
- Wheeled and tracked vehicle mechanics
- Aircraft and powertrain maintenance
- Construction and heavy equipment operators
- Automotive and small-engine repair
- Machinist and metalworking roles
If your goal is a mechanical job, treat AS as a priority. If your goal is simply to enlist, put your energy into the AFQT subtests first and use AS to widen your options. You can check exactly how your numbers add up with the ASVAB score calculator.
How many questions and how long
| Version | Format | Questions | Time |
|---|---|---|---|
| Paper (P&P) | One combined AS section | ~25 | ~11 min |
| CAT-ASVAB | Split: Auto + Shop | Two short parts | Separately timed |
The pace is quick, so accuracy and quick recognition matter more than deep analysis. There is no calculator on any part of the ASVAB, and you will not need one here.
5 tips to raise your AS score
- Learn parts by system, not in a list. Grouping “ignition,” “brakes,” and “cooling” together helps you recall how pieces connect on test day.
- Master the tools. Many questions simply ask which tool does a job. Know what a torque wrench, feeler gauge, coping saw, and ball-peen hammer are each for.
- Use your hands. Change a tire, check your oil, or watch a short repair video. Real exposure beats memorizing definitions.
- Skim the whole set first. Answer the parts you know instantly, then return to the tougher ones so the clock never traps you.
- Study the Auto & Shop Information study guide. It walks through every system and tool with plain-English explanations and quick self-checks.
A worked example
Question: While the engine is running, which component generates electrical power and recharges the battery?
- A. Starter motor
- B. Alternator
- C. Spark plug
- D. Radiator
Answer: B — the alternator. Here is the logic: the battery provides the burst of power that cranks the starter to get the engine going. Once the engine is running, the alternator takes over — it is turned by the engine belt to generate electricity for the car and to recharge the battery. The spark plug ignites fuel, and the radiator cools the engine, so neither handles charging. Reasoning through the role of each part, instead of guessing, is exactly how you beat AS questions.
Where AS fits in your overall ASVAB plan
Auto & Shop Information is a job-qualifying subtest, not an enlistment gate. So build your study plan in this order: lock in the four AFQT subtests first with the AFQT practice test, then sharpen the technical subtests — AS and mechanical comprehension — that unlock the career you want. When you are ready to test everything together, take a full ASVAB practice test so the pacing feels familiar on the real thing.
Keep your reps short and steady. A few focused sessions a week on the quiz above, backed by the study guide, will move your AS score well before test day.
