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FAA Aviation Mechanic General Practice Test

Basic electricity, aircraft drawings, weight and balance, materials and processes, ground operations, maintenance forms, regulations and physics for the AMT General knowledge test.

170 questions · 7 topics · free, no sign-up

Mixed practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

Timed mock exam

50 questions in 60 minutes, drawn from every topic. No answers shown until the end, then a score, your weakest topics and a review of what you missed.

Practise by topic

Sample questions

Which type of drawing gives all the information needed to make a single part?

  1. Assembly drawing
  2. Detail drawing
  3. Installation drawing
  4. Block diagram
Show the answer

B. Detail drawing

A detail drawing describes one part completely: shape, size, material and finish. An assembly drawing shows how two or more parts go together and usually leaves out the information needed to make each one.

Reference: FAA-H-8083-30, Aircraft Drawings (types of drawings)

A landing light draws 9 A from a 28 V DC bus. How much power does it use?

Answer in W.

Show the answer

252 W

P = E × I = 28 V × 9 A = 252 W.

Reference: FAA-H-8083-30, Fundamentals of Electricity and Electronics (power)

Which extinguisher is suitable for a fire in energized electrical equipment?

  1. Carbon dioxide
  2. Plain water
  3. Water-based foam
  4. Soda-acid
Show the answer

A. Carbon dioxide

Carbon dioxide does not conduct electricity and leaves no residue, so it suits Class C fires. Water and water-based agents conduct current and put the operator at risk of shock.

Reference: FAA-H-8083-30, Safety, Ground Operations and Servicing (fire protection; extinguishing agents)

What is the purpose of the lay line printed along a flexible hose?

  1. To mark the minimum bend radius
  2. To show whether the hose is twisted
  3. To show the direction of fluid flow
  4. To mark where to cut the hose
Show the answer

B. To show whether the hose is twisted

If the lay line spirals around the hose after installation, the hose has been twisted, which can loosen fittings and shorten hose life. The line also carries the hose identification, but it does not indicate flow direction.

Reference: FAA-H-8083-30, Fluid Lines and Fittings (flexible hose installation)

What is the area of a piston head 3 in in diameter?

Answer in in².

Show the answer

7.07 in²

A = π × r² = 3.1416 × 1.5² = 3.1416 × 2.25 = 7.07 in².

Reference: FAA-H-8083-30, Mathematics in Aviation Maintenance (area of a circle)

Exams this helps with

ExamWho runs itWhere
Aviation mechanic General readyFAAUnited States

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