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FAA aviation mechanic General knowledge test (AMG)

FAA A&P General test prep: 1,374 practice questions, every answer sourced.

Practice for the FAA Aviation Mechanic General (AMG) knowledge test with original questions written from the FAA's own publications. Every question shows the exact words of the FAA document that settle its answer, and links to it.

Start free Try 5 sample questions

Free for each test: 30 questions, a 20-question mini exam and 3 lessons, plus the glossary. A free account (email address only) is needed after your first 10 answers. In your browser now. Android and iPhone apps are planned.

60questions in the practice exam
2 hourstime limit
70%to pass
1,374General practice questions

The General practice exam matches the FAA format for the General test: 60 questions, 2 hours, 70% to pass. Its questions are the app's own, and a score on it does not predict your result on the FAA's test.

What the General course includes

Five free General sample questions

These five are from the General free sample, exactly as they appear in the app. Choose an answer to see the explanation, the FAA's own words and the source. In the app, the choices are shown in a shuffled order.

Sample question 1 of 5Regulations, forms, records and publications
A mechanic moves to a new permanent mailing address. Within what time must the FAA Airman Certification Branch be notified in writing?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is C: Within 30 days after the change

Section 65.21 requires the holder of a certificate issued under Part 65 to notify the FAA Airman Certification Branch in Oklahoma City in writing of the new address within 30 days after any change in permanent mailing address.

The FAA's words

“Within 30 days after any change in his permanent mailing address, the holder of a certificate issued under this part shall notify the Department of Transportation, Federal Aviation Administration, Airman Certification Branch”

14 CFR 65.21

Source: 14 CFR 65.21

Sample question 2 of 5Electricity and electronics
In a parallel AC circuit, 0.3 ampere flows through a resistor branch and 0.4 ampere through an inductor branch. What is the total current?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is B: 0.5 ampere

In a parallel AC circuit the branch voltages are the same, and the out-of-phase branch currents are added by the law of right triangles: IT = √(IL² + IR²) = √(0.16 + 0.09) = 0.5 ampere. Because the total contains an inductive component, it lags the applied voltage by the phase angle.

The FAA's words

“Out of phase voltages and currents can be added by using the law of right triangles. However, in solving circuit problems, the currents through the branches are added since the voltage drops across the various branches are the same and are equal to the applied voltage.”

FAA-H-8083-30B, Chapter 12, page 12-62

Source: FAA-H-8083-30B, Chapter 12, page 12-62

Sample question 3 of 5Materials, hardware and processes
Whenever possible, how should a bolt be positioned, and why?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is A: With the head on top or in the forward position, so the bolt tends not to slip out if the nut is lost

Whenever possible the bolt is placed with the head on top or in the forward position; this positioning tends to prevent the bolt from slipping out if the nut is accidentally lost. Washers go under both head and nut unless their omission is specified, and the grip length should equal the thickness of the material bolted together.

The FAA's words

“Whenever possible, place the bolt with the head on top or in the forward position.”

FAA-H-8083-30B, Chapter 7, page 7-48

Source: FAA-H-8083-30B, Chapter 7, page 7-48

Sample question 4 of 5Aircraft drawings
What does 'fuselage station 185' mean?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is C: A location 185 inches from the aircraft's datum, usually measured from the nose or zero station

A numbering system locates stations on large assemblies such as fuselage frames: fuselage station 185 indicates a location 185 inches from the datum of the aircraft, usually measured from the nose or zero station, though sometimes from the firewall or another point chosen by the manufacturer.

The FAA's words

“Fuselage station 185 indicates a location that is 185 inches from the datum of the aircraft.”

FAA-H-8083-30B, Chapter 4, page 4-8

Source: FAA-H-8083-30B, Chapter 4, page 4-8

Sample question 5 of 5Cleaning, corrosion control and finishes
In an oxygen concentration cell, where does the corrosion occur?

Choose an answer to see if it is right, and why.

✓ Correct.

✗ Not quite. The answer is A: At the area of low oxygen concentration, which is the anode

An oxygen cell develops where oxygen cannot diffuse into the solution, creating a difference in oxygen concentration between two points; corrosion occurs at the area of low oxygen concentration, the anode, typically under gaskets, wood, rubber and other materials in contact with the metal. Stainless steel is particularly susceptible.

The FAA's words

“Corrosion occurs at the area of low oxygen concentration (anode).”

FAA-H-8083-30B, Chapter 8, page 8-7

Source: FAA-H-8083-30B, Chapter 8, page 8-7

The free sample has 30 General questions and a 20-question mini exam. Start free, no card needed.

Subject areas and topics

The General course is arranged in these areas, with a short lesson for each topic. Lessons marked “Free lesson” are in the free sample.

Electricity and electronics

  • Electron theory, static, magnetism and electrical units
  • Ohm's Law, DC circuits, circuit devices and troubleshootingFree lesson
  • AC theory, capacitance, inductance, transformers and meters
  • Batteries, inverters and power conversion
  • Semiconductors, transistors, amplifiers and logic gates
  • Generators, motors, alternators and their controls

Aircraft drawings

  • Drawing types, views, title blocks and numbering
  • Lines, symbols, dimensions and tolerances
  • Reading drawings, sketches, graphs and charts

Weight and balance

  • Weight and balance terms, limits and records
  • Preparing for and weighing an aircraft
  • CG, loading, equipment change and ballast calculationsFree lesson

Fluid lines and fittings

  • Tubing and hose materials, sizes, fittings and markings
  • Rigid line fabrication, installation, torque and inspection
  • Flexible hose fabrication, testing and installation

Materials, hardware and processes

  • Metals, nonmetallics, seals and their properties
  • Metalworking, heat treatment and hardness testing
  • Bolts, nuts, washers, screws, rivets and fasteners
  • Torque, control cables, turnbuckles and safetying

Ground operations and servicing

  • Shop, flight line, machine tool and hazmat safety
  • Fire classes, extinguishers and their use
  • Tie-down, towing, taxiing and signals
  • Engine starting, hand propping and ground running
  • Servicing fluids, oxygen, ground equipment and fuel

Cleaning, corrosion control and finishes

  • Corrosion theory, causes and types
  • Corrosion-prone areas, inspection and prevention
  • Corrosion removal, treatment and surface finishes
  • Aircraft cleaning agents, methods and safety
  • Paints, finishes and registration marks

Mathematics

  • Areas, volumes and geometric terms
  • Ratios, proportions and percentages
  • Fractions, signed numbers, powers, notation and conversions

Regulations, forms, records and publications

  • Mechanic certificate: privileges and limitsFree lesson
  • Inspection authorization
  • Maintenance definitions: major, minor, preventive
  • Who may perform and approve work
  • Maintenance records and Form 337
  • Required inspections and intervals
  • Airworthiness directives
  • Approved data, parts and inoperative equipment

Physics for aviation

  • Matter, energy, work, power and torque
  • Simple machines, stress, motion and Newton's laws
  • Heat, pressure, gas laws and fluid mechanics
  • The atmosphere and theory of flight

Inspection concepts and techniques

  • Inspection programs, intervals and special inspections
  • Nondestructive testing methods
  • Measuring tools, calibration and weld inspection

Human factors

  • Human error, models and event investigation
  • The dirty dozen and their countermeasures
  • Fatigue, stress and the work environment

Where the General answers come from

Every General question cites FAA publications and regulations like these, with a link to the document.

The other A&P tests

One subscription covers all three tests: $19.99 a month or $79.99 a year, both renewing until you cancel. See pricing.

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Independent study aid. Not affiliated with or endorsed by the FAA. The questions are original practice questions, not questions from any FAA test.