Free Aviation Maintenance Technician General Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Aviation Maintenance Technician General practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1During a bench check, a mechanic connects a 7-ohm resistive load across a 28-volt DC supply. What current should flow through the load?

   1. A. 0.25 ampere
   2. B. 4 amperes
   3. C. 21 amperes
   4. D. 196 amperes

   Answer: B

   Explanation: The handbook states, "the current is equal to the source voltage divided by the total resistance of the series circuit." Thus I = 28/7 = 4 amperes. Reversing the division, subtracting, or multiplying does not give the required current.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Fundamentals of Electricity & Electronics — Determining the Voltage Divider Formula

2. 2A mechanic needs the drawing class whose primary purpose is to show the relationship of the parts making up an object. Which class should be selected?

   1. A. Detail drawing
   2. B. Installation drawing
   3. C. Assembly drawing
   4. D. Wiring diagram

   Answer: C

   Explanation: For an assembly drawing the handbook states, "Its primary purpose is to show the relationship of the various parts." A detail drawing specifies a single part, an installation drawing locates the installed assembly, and a wiring diagram describes electrical connections.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Aircraft Drawings — Assembly Drawing

3. 3While updating an aircraft weight-and-balance report, a mechanic needs the manufacturer’s reference plane for horizontal balance measurements. Which term identifies that plane?

   1. A. Center of gravity
   2. B. Datum
   3. C. Center of lift
   4. D. Moment arm

   Answer: B

   Explanation: The handbook states, "The datum is an imaginary vertical plane from which all horizontal measurements are taken for balance purposes, with the aircraft in level flight attitude." The CG and center of lift are points of resultant force; an arm is a distance from the datum.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Aircraft Weight & Balance — Datum

4. 4A spring-steel aircraft part returns to its original dimensions after the applied load is removed. Which material property is being demonstrated?

   1. A. Malleability
   2. B. Ductility
   3. C. Hardness
   4. D. Elasticity

   Answer: D

   Explanation: The handbook states, "Elasticity is a property that enables a metal to return to its original size and shape when the force that causes the change of shape is removed." The other properties concern forming or resistance to penetration rather than recovery after unloading.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Aircraft Materials, Hardware, & Processes — Elasticity

5. 5During ground maintenance, a fire involves energized aircraft electrical wiring. Which fire classification applies while the circuit remains energized?

   1. A. Class A
   2. B. Class B
   3. C. Class C
   4. D. Class D

   Answer: C

   Explanation: The handbook states, "Class C fires involve energized electrical wiring and equipment." Class A concerns ordinary combustibles, B flammable liquids, and D combustible metals.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Safety, Ground Operations, & Servicing — Classification of Fires

6. 6A mechanic finds an extruded aluminum member with surface grains lifted by expanding corrosion products along subsurface grain boundaries. Which form of corrosion is indicated?

   1. A. Filiform corrosion
   2. B. Fretting corrosion
   3. C. Exfoliation corrosion
   4. D. Uniform surface corrosion

   Answer: C

   Explanation: The handbook states, "Exfoliation corrosion is an advanced form of intergranular corrosion and shows itself by lifting up the surface grains of a metal by the force of expanding corrosion products occurring at the grain boundaries just below the surface." The lifted grain structure distinguishes it from the other forms.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Cleaning & Corrosion Control — Exfoliation Corrosion

7. 7A mechanic calculates a bushing dimension of 2.346 inches and must record it to the nearest hundredth of an inch. What value should be recorded?

   1. A. 2.34 inches
   2. B. 2.40 inches
   3. C. 2.36 inches
   4. D. 2.35 inches

   Answer: D

   Explanation: The handbook states, "When the digit immediately to the right of the last retained digit is 5 or greater, round up by 1." The thousandths digit is 6, so the hundredths digit 4 increases to 5. Truncating gives 2.34; 2.40 changes the wrong place; 2.36 copies the discarded digit into the retained place.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Mathematics — Rounding Off Decimal Numbers

8. 8A mechanic compares the kinetic energy of the same aircraft rolling at two ground speeds. If speed doubles while mass remains constant, how does kinetic energy change?

   1. A. It doubles.
   2. B. It is halved.
   3. C. It increases fourfold.
   4. D. It decreases to one-fourth.

   Answer: C

   Explanation: The handbook gives "Kinetic Energy = 1⁄2 Mass × Velocity2". Doubling velocity squares the factor of two, producing four times the kinetic energy. The other factors assume linear or inverse dependence.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Physics for Aviation — Kinetic Energy

9. 9A mechanic proposes liquid penetrant inspection of a nonporous aluminum bracket. Which defect can this method reveal?

   1. A. A crack opening onto the bracket surface
   2. B. A crack sealed entirely beneath the bracket surface
   3. C. An inclusion enclosed within the bracket material
   4. D. A void isolated within the bracket material

   Answer: A

   Explanation: The handbook states, "Penetrant inspection is a nondestructive test for defects open to the surface in parts made of any nonporous material." The penetrant needs access through a surface opening; the three enclosed defects lack that access.

   Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Inspection Concepts & Techniques — Liquid Penetrant Inspection

10. 10A maintenance crew uses the PEAR model to review a work area with poor lighting and excessive noise. Which PEAR consideration primarily describes those workplace conditions?

    1. A. People
    2. B. Environment
    3. C. Actions
    4. D. Resources

    Answer: B

    Explanation: Under the physical environment, the handbook states, "It includes ranges of temperature, humidity, lighting, noise control, cleanliness, and workplace design." The conditions themselves are Environment; supplying lamps or hearing protection would involve Resources.

    Reference: Aviation Maintenance Technician Handbook–General (FAA-H-8083-30B) — Human Factors — Physical environment