ASVAB CampAuto Information (AI)
Knowledge of automobile technology. It feeds the line scores used for job qualification.
- 10 questions
- 7 minutes
- ~42 s per question
- Line scores
- No calculator
- 10 lessons · 16 h
Lessons
10 lessons · 400 practice questions · 80 flashcards- 01Engine Fundamentals and Four-Stroke CycleUnderstand the four-stroke engine cycle, part functions, piston/valve motion, spark versus compression ignition, and simple bore/stroke/ratio/rpm calculations.84 min40 questions8 cards
- 02Fuel, Air and Ignition SystemsExplain gasoline and diesel combustion differences, fuel and intake systems, sensors/ECU commands, ignition, diagnostics and practical AFR/lambda/timing calculations.90 min40 questions8 cards
- 03Cooling and LubricationIdentify cooling/lubrication components and separate their flow paths; reason about warnings and vehicle-specific maintenance; calculate heat energy/rate with supplied values.100 min40 questions8 cards
- 04Transmission and DrivetrainTrace powertrain layouts; distinguish transmissions, clutches and differentials; solve gear ratios and torque/speed scenarios with supplied assumptions.110 min40 questions8 cards
- 05Brake SystemsUnderstand the hydraulic and friction brake force chain, disc/drum anatomy, ABS and driver warning interpretation, safe failure recognition and ideal basic pressure, area, energy and distance calculations.80 min40 questions8 cards
- 06Steering and SuspensionIdentify steering and suspension components by function, analyze wheel alignment and symptom caveats, solve steering-ratio and spring-force/energy problems, and explain safe evaluation.80 min40 questions8 cards
- 07Automotive Electrical and Charging SystemsTrace battery, starter, alternator and protective circuits; read ideal DC circuit diagrams, calculate voltage/current/power/energy, and distinguish safety-critical diagnostic observations.95 min40 questions8 cards
- 08Tires and WheelsIdentify safe tire/wheel operation, markings, maintenance, failure clues, and basic mechanics; accurately differentiate TPMS, balance, alignment and rotation; compute approximate diameter, friction and rotational quantities.100 min40 questions8 cards
- 09Maintenance Tools and Service BasicsSelect hand, measuring, electrical and lifting tools appropriate to routine automotive maintenance while applying safe shop practices; solve ideal torque and basic electrical measurements.110 min40 questions8 cards
- 10Basic Symptom DiagnosisUse safe symptom grouping and noninvasive evidence to distinguish starting, charging, combustion, cooling, lubrication, brake, tire, steering and OBD conditions without overclaiming a specific failed component.115 min40 questions8 cards
Auto Information practice tests
6 tests · each 10 questions · 7 min · no question repeats between tests
About this section
Auto Information tests how cars work and how they are maintained. On the CAT-ASVAB it is scored as its own subtest, and on the paper version it is combined with Shop Information. It is not part of the AFQT, but it matters for mechanical and vehicle-related jobs.
The category covers 10 lessons. It opens with engine fundamentals and the four-stroke cycle, then fuel, air and ignition systems, cooling and lubrication, and transmission and drivetrain. Next come brake systems, steering and suspension, automotive electrical and charging systems, and tires and wheels. The final two lessons cover maintenance tools and service basics and basic symptom diagnosis, where you connect a symptom to its likely cause.
No garage experience is required. Work through the lessons in order and take each lesson test to check your recall.
Take it with you: the free app
The same 124 lessons, 6,516 questions and 82 timed practice tests on your phone, plus flashcards with spaced review and progress tracking. Free to download, and it works offline.
- Works offline
- Spaced-review flashcards
- Progress for every subtest
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