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Federal Aviation Administration (FAA)

Aviation Mechanic General (AMG) — FAA Airman Knowledge Test

The first of the three A&P written tests — electricity, weight and balance, hardware, corrosion, math, physics and maintenance regulations in one 60-question FAA test.

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Questions60 multiple-choice questions
Time2 hours — 2 minutes each
Passing70% — scored as percent correct
FormatThree answer choices (A, B, C), one best answer; some questions refer to figures in the FAA-CT-8080-4G testing supplement provided at the test center
WhereOn computer at a PSI test center — about $175 at PSI (confirm when you book); remote testing isn't offered
EligibilityPart 147 General curriculum completion document, FAA Form 8610-2 signed by an FAA inspector, or military Certificate of Eligibility — plus an FTN from IACRA
ValidityYour test report is good for 24 calendar months — pass the oral and practical test within that window

About the exam

The Aviation Mechanic General test is the core knowledge test every mechanic applicant takes on the way to an FAA mechanic certificate with an Airframe and/or Powerplant (A&P) rating. It covers the shared foundation behind both ratings — electricity, drawings, weight and balance, fluid lines, materials and hardware, ground handling, corrosion control, math, physics, inspection and the regulations, forms and records that govern maintenance. You take it after finishing the General portion of a Part 147 school, with documented practical experience signed off by an FAA inspector, or with a military Certificate of Eligibility.

The test has 60 multiple-choice questions in 2 hours, each with three answer choices, and you need 70% to pass. It's taken on computer at a PSI test center — remote testing isn't offered — and you'll need an FAA Tracking Number (FTN) from IACRA plus your eligibility document. Some questions refer to figures in the FAA-CT-8080-4G testing supplement, such as circuit diagrams, wire charts and weight-and-balance drawings, which the center provides. Your test report is valid for 24 calendar months, and all mechanic tests must be passed within that window.

Our practice covers all twelve General subject areas of the mechanic ACS with original questions mapped to the ACS knowledge elements, and a step-by-step worked solution for every calculation — Ohm's law and series-parallel circuits, empty-weight CG from scale readings, %MAC, torque-wrench extensions, cylinder displacement, gas laws and temperature conversions. Add flashcards for hardware codes, regulations and terms, worked case walkthroughs for logbook entries and weight-and-balance changes, illustrated guides to circuits, fittings and corrosion types, and timed practice tests at the real length with a score.

How we track your progress

Every blueprint domain moves through five levels as you study:

  1. Not startedNo questions answered in this domain yet.
  2. Getting startedFirst questions answered — not enough yet to judge.
  3. DevelopingAt least 5 answered and 50% or better on your recent questions.
  4. ProficientAt least 15 answered and 70% or better on your recent questions.
  5. Exam readyAt least 25 answered, 80% or better recently, and holding up on hard questions.

The exam blueprint

FAA-S-ACS-1 Aviation Mechanic General, Airframe, and Powerplant ACS (November 2021; required for all mechanic testing since August 1, 2023) with the FAA-G-ACS-1 Companion Guide — Section I General — Twelve General subject areas — electricity, drawings, weight and balance, hardware, regulations, physics, human factors and more. Domain weights are QuizMe estimates — the FAA does not publish them. Tap a domain to see its topics.

1 Electricity and Electronics about 12% (est.) of the exam
Electron theory, magnetism, capacitance and inductanceAC and DC circuits; series, parallel and series-parallelOhm's, Kirchhoff's and Watt's lawsUsing a multimeter to measure voltage, current and resistanceBatteries: lead-acid and nickel-cadmium servicingTransformers, AC/DC motors and reading circuit drawingsSwitches, relays, fuses, circuit breakers and resistor color codesSemiconductors, digital logic, binary and electrostatic discharge

41 practice questions in this domain so far

2 Aircraft Drawings about 7% (est.) of the exam
Drawings, blueprints, sketches, charts, graphs and schematicsLines and symbols on aircraft drawingsDimensions and tolerancesDrawing changes and revision identificationApplicability by model and serial numberChecking a repair or alteration against type design

24 practice questions in this domain so far

3 Weight and Balance about 10% (est.) of the exam
Terms: datum, arm, moment, CG, moment index and MACWeighing procedures, scales, tare and jackingEmpty weight and empty-weight CG from scale readingsCG limits and adverse-loading checksRecomputing CG after equipment changesBallast weight and locationCG as a percent of MACEffects of CG on aerodynamics and performance

35 practice questions in this domain so far

4 Fluid Lines and Fittings about 7% (est.) of the exam
Rigid tubing and flexible hose materials, uses and sizesAN/MS flared and flareless fittingsMaterial identification and color codesTube bending and flaringHose fabrication and installation: lay line, twist, slackInspecting lines and hoses; torque and witness marks

24 practice questions in this domain so far

5 Materials, Hardware and Processes about 10% (est.) of the exam
Aircraft metals: aluminum alloys, steel and titaniumHeat treatment processesStresses: tension, compression, torsion, bending and shearAN/MS/NAS bolts, nuts, washers and rivets — decoding part numbersSafety wire, cotter pins and safety clipsPrecision measurement and torqueMaterial compatibility and identification markingsWelding and soldering: acceptable and unacceptable joints

35 practice questions in this domain so far

6 Ground Operations and Servicing about 8% (est.) of the exam
Towing, tie-down and securing aircraftFueling and defueling; grounding and bondingFuel grades, colors, additives and contaminationEngine starting, ground runs and taxi proceduresHand signals and runway incursion avoidanceFire extinguisher types and classesServicing oil, hydraulic, pneumatic and oxygen systemsHazardous materials, SDS, PPE, FOD and tool control

29 practice questions in this domain so far

7 Cleaning and Corrosion Control about 8% (est.) of the exam
Corrosion theory and causesCorrosion types: galvanic, intergranular, exfoliation, filiformCorrosion-prone areas and detectionRemoval, treatment and preventive compoundsDissimilar metals and protective barriersCleaning agents, conversion coatings, primers and topcoatsRegistration markings and placards (14 CFR Part 45)Safety with finishing materials

29 practice questions in this domain so far

8 Mathematics about 7% (est.) of the exam
Area and volume: wing area, cylinder displacementRatio, proportion, percentage and compression ratioAlgebra, order of operations and signed numbersPowers, roots and scientific notationFractions, decimals and roundingUnit and metric conversions (in-lb to ft-lb)Binary numbers

23 practice questions in this domain so far

9 Regulations, Forms, Records and Publications about 12% (est.) of the exam
Mechanic privileges and limitations (14 CFR 65.81–65.85)Maintenance record entries (14 CFR 43.9 and 43.11)Major vs. minor repairs and alterations (Part 43 Appendix A)FAA Form 337, 8010-4 and 8130-3Type Certificate Data Sheets and STCsAirworthiness Directives and alternative methods of complianceAdvisory circulars, manuals and service bulletinsApproved vs. acceptable data; inoperative equipment and MEL

41 practice questions in this domain so far

10 Physics for Aviation about 7% (est.) of the exam
Matter, energy, work, power and horsepowerForce, area and pressure; simple machinesTemperature conversions and heatGas laws and fluid mechanicsBernoulli's principle and Newton's lawsStandard atmosphere, pressure and density altitudeTheory of flight, flight controls and aerodynamic devices

23 practice questions in this domain so far

11 Inspection Concepts and Techniques about 7% (est.) of the exam
Calipers, micrometers and gauges; reading a vernierTool calibrationNDT: dye penetrant, magnetic particle and eddy currentNDT: ultrasonic, radiography and tap testing100-hour, annual and progressive inspection programsDemagnetizing after magnetic particle inspection

23 practice questions in this domain so far

12 Human Factors about 7% (est.) of the exam
Safety culture and organizational factorsHuman error types and the Dirty DozenFatigue, fitness for duty and human limitationsShift and task turnoverHazard reporting and teamworkProfessionalism and integrity

23 practice questions in this domain so far

What you get when you access this exam

Free with your QuizMe account.

Questions built on the mechanic ACS

Every question is tagged to a Section I General subject area of the mechanic ACS — three-choice questions written to current regulations, with charts and diagrams given as described figures and tables.

Hints that teach the principle

Reveal the rule, formula or regulation behind the question when you're stuck. Every answer comes with the full rationale and a step-by-step worked solution for every calculation.

Adaptive practice

Questions steer toward your weakest subject areas, weighted like our estimate of the real test, and get harder as you get stronger.

Timed practice tests

Area-weighted tests at the real length — 60 questions in 2 hours — with a pacing indicator, full review and an estimated score against the 70% pass mark.

Flashcards, walkthroughs and guides

Flashcards for hardware codes, regulations and key terms, worked case walkthroughs that reason through logbook entries and weight-and-balance changes step by step, and interactive illustrated guides you explore hotspot by hotspot.

Progress in every subject area

Each area moves from Not started to Exam ready, so you know exactly what to study next.

Test at home or at a center

The Aviation Mechanic — General knowledge test is given on computer at PSI test centers. Get an FAA Tracking Number (FTN) by creating a profile in IACRA, then schedule with PSI and bring your eligibility document on test day.

At a PSI test center

  • Schedule with PSI using your FTN; the fee is about $175 — confirm the current amount when you book.
  • Bring acceptable photo ID and one eligibility document: a Part 147 school completion document, an FAA Form 8610-2 signed by an FAA inspector, a military Certificate of Eligibility, or your failed test report for a retest.
  • The FAA-CT-8080-4G figures supplement is provided at the center — don't bring your own copy.
  • A basic electronic calculator the FAA allows is permitted; phones, notes and bags are stored away for the whole test.

No remote option

  • FAA airman knowledge tests are not offered as remote-proctored exams — every test is taken in person at a PSI center.
  • Book early if you're on a school or employer timeline; seat availability varies by location.
  • Your 24-month window starts from the month you pass, so plan the oral and practical test before you book.
  • Practice with our timed tests at home on the same length and time.

Exam-day game plan

How to walk in ready — and how to pace 60 questions in 2 hours.

Pacing checkpoints

Our timed test uses the real length and time — 60 questions in 2 hours. Figures that the real test shows from the FAA-CT-8080-4G testing supplement are reproduced as described text, tables or simple diagrams — not the official FAA charts.

15questions0:30
30questions1:00
45questions1:30
60questions2:00

The week before

  • Take one full-length timed practice test 4–7 days out, then review every missed ACS area.
  • Drill the calculations until they're automatic: Ohm's law, empty-weight CG, %MAC, torque-wrench extensions and displacement.
  • Review 14 CFR 43.9/43.11 entries, Form 337 and the Part 43 Appendix A list of major repairs and alterations.
  • Confirm your PSI appointment, FTN, photo ID and eligibility document.

During the test

  • Use the full 2 minutes per question — checkpoints at about 15, 30 and 45 questions keep you on track.
  • For figure questions, read the figure number in the stem and check the units and notes on the chart before calculating.
  • Write each calculation step on your scratch paper — sign errors and unit conversions are where points slip.
  • With three choices, eliminate the clearly wrong one first; mark hard questions and come back.
  • Answer every question — an unanswered question counts as wrong.

Keep your head

  • A few nerves sharpen focus. If you freeze, take three slow breaths and reread the question.
  • You need 70%, not perfection — on 60 questions you can miss up to 18 and still pass.
  • Missed topics show up as ACS codes on your report, and the examiner reviews them at your oral and practical — every miss is something to study, not the end of the road.

After you test

  • You get your Airman Knowledge Test Report at the test center; it shows your percent score and lists the ACS codes (like AM.I.A.K7) of the topics you missed.
  • The report is valid for 24 calendar months — all mechanic tests (knowledge, oral and practical) must be passed within that window. If you fail, you can retest after 30 days, or sooner with a signed statement of additional instruction from a certificated mechanic with the rating.
  • Next come the Airframe and Powerplant knowledge tests for the ratings you want, then the oral and practical test with a Designated Mechanic Examiner, who reviews the ACS codes you missed.

Official sources and further reading

Ready to start?

350 questions and scenarios across the blueprint — and growing.

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QuizMe is not affiliated with or endorsed by the FAA or PSI. All questions are original. Details are summarized from FAA sources (ACS, testing matrix, 14 CFR); rules and policies change — always confirm at faa.gov. Estimated scores are rough guides.