41 questions from the FAA Aviation Mechanic General knowledge test, answered
The FAA Aviation Mechanic General knowledge test is 60 questions and takes 42 correct — 70% — to pass.
These 41 come out of FAA A&P Mechanic Test 2026's own 350-question bank. Each answer keeps the app's explanation and the public source it was written from — nothing here was written for the web.
Aircraft Drawings4
- Which type of drawing provides the information needed to place a part or assembly in its final position in the aircraft?
- Which line is drawn from a note, dimension, or part number to the specific feature it refers to and terminates in an arrowhead touching that feature?
- What is the purpose of an extension line on an aircraft drawing?
- What information does a detail drawing provide?
Aircraft Materials, Hardware & Processes4
- When lockwire (safety wire) is used to secure a fastener, how must the wire be routed relative to that fastener?
- What is the purpose of the thin pure-aluminum surface layer on Alclad 2024 sheet stock?
- Why must 2017 (D) and 2024 (DD) solid rivets be kept in a refrigerator ('icebox') after solution heat treatment and driven within a limited time?
- Which statement correctly describes the 2000 series of wrought aluminum alloys?
Cleaning & Corrosion Control4
- What is the primary corrosion-control function of the commercially pure aluminum 'cladding' metallurgically rolled onto Alclad aluminum-alloy sheet?
- Why must rust be removed completely from a steel part, whereas the smooth surface oxidation that forms naturally on bare aluminum is not considered harmful?
- What is the primary purpose of applying a water-displacing corrosion-preventive compound (CPC) to seams, hinges, and water-entrapment (bilge) areas of an airframe?
- Why must painted surfaces be inspected often for blisters, flakes, chips, and lumps?
Fluid Lines & Fittings4
- Aircraft rigid tubing is sized by a dash number that states the outside diameter in sixteenths of an inch. What is the outside diameter of a size -6 aluminum tube?
- Titanium 3AL-2.5V tubing is valued for very high-pressure service, yet it is prohibited from use in one particular system. Which system, and why?
- How should a flexible hose be installed with respect to length, and why?
- No tube cutter is available and a length of hard tubing must be cut. What does the handbook direct?
Fundamentals of Electricity & Electronics3
Ground Operations & Servicing3
Human Factors3
Inspection Concepts & Techniques3
- Which credential is required to approve an aircraft for return to service after an annual inspection?
- When conducting a 100-hour or annual inspection, 14 CFR 43.15 requires the person performing it to use a checklist that, at a minimum, meets what condition?
- What is the purpose of the couplant used during ultrasonic inspection?
Mathematics3
Physics for Aviation3
Regulations, Maintenance Forms, Records & Publications3
- Which of the following is a required condition to be eligible to apply for an Inspection Authorization (IA)?
- When a type-certificated aircraft is sold, which maintenance record must the seller transfer to the new owner?
- How long does an FAA mechanic certificate with Airframe and Powerplant ratings remain effective?
Weight & Balance4
- How does loading an aircraft above its maximum allowable gross weight most directly affect its performance?
- How does an aircraft's maximum ramp (taxi) weight relate to its maximum takeoff weight?
- What does an aircraft's maximum zero fuel weight represent?
- Why is ballast always placed as far away as possible from the CG limit that is being corrected?