100+ Free FAA Aviation Mechanic — Powerplant (AMP) Practice Questions
Pass your FAA Aviation Mechanic — Powerplant Knowledge Test (AMP) exam on the first try — instant access, no signup required.
A circuit breaker in an aircraft engine electrical circuit is designed to:
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Key Facts: FAA Aviation Mechanic — Powerplant (AMP) Exam
100
Multiple-Choice Questions
FAA Airman Knowledge Test (code AMP)
2 hours
Time Limit
FAA airman knowledge testing
70%
Passing Score
FAA airman knowledge test standards
~$175
PSI Testing Fee
PSI FAA airman testing
3
Separate Mechanic Tests (General, Airframe, Powerplant)
14 CFR Part 65
Part 65
Eligibility Regulation
14 CFR Part 65
The FAA Aviation Mechanic Powerplant knowledge test (code AMP) is 100 multiple-choice questions with a 2-hour time limit and a 70% passing score, delivered by computer through PSI on the FAA airman testing system. It is one of three separate mechanic knowledge tests (General, Airframe, Powerplant) and tests powerplant subjects from the FAA-S-ACS-1 Powerplant ACS. Eligibility to test is governed by 14 CFR Part 65, which requires graduation from an FAA-certificated Aviation Maintenance Technician School or documented practical experience. This free bank provides 100 powerplant practice questions with detailed explanations across all 14 subject areas.
Sample FAA Aviation Mechanic — Powerplant (AMP) Practice Questions
Try these sample questions to test your FAA Aviation Mechanic — Powerplant (AMP) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1In a four-stroke reciprocating aircraft engine, how many crankshaft rotations are required to complete one full operating cycle for a single cylinder?
2Valve overlap in a reciprocating engine refers to the period when:
3What is the primary purpose of the dynamic dampers (counterweights) attached to the crankshaft of a radial reciprocating engine?
4The compression ratio of a reciprocating engine is defined as the ratio of:
5Detonation in a reciprocating engine cylinder is best described as:
6Preignition in a reciprocating engine cylinder is caused by:
7On a horizontally opposed aircraft engine, the firing order is designed primarily to:
8What is the function of the piston rings in a reciprocating engine?
9A differential compression test on a reciprocating engine cylinder primarily detects:
10During a differential compression test, if air escapes audibly from the engine breather or oil filler tube, the most likely cause is:
About the FAA Aviation Mechanic — Powerplant (AMP) Exam
The FAA Aviation Mechanic — Powerplant Knowledge Test (AMP) is the FAA airman knowledge test required for the powerplant rating of the A&P mechanic certificate. It is a 100-question, computer-based multiple-choice test delivered through PSI, covering reciprocating and turbine engines, propellers, ignition, fuel, lubrication, electrical, induction/cooling, instruments, inspection, overhaul, fire protection, and exhaust systems under 14 CFR Part 65 and the FAA-S-ACS-1 Powerplant ACS.
Assessment
100 multiple-choice, 2 hours, 70% to pass, computer-based via PSI (official FAA AMP test, separate from General & Airframe); this practice bank is 100 selected-response items
Time Limit
2 hours
Passing Score
70%
Exam Fee
~$175 (PSI testing fee) (Federal Aviation Administration (FAA))
FAA Aviation Mechanic — Powerplant (AMP) Exam Content Outline
Reciprocating Engines
Four-stroke cycle, valve timing and overlap, compression ratio, detonation and preignition, firing order, piston rings, crankshafts and dynamic dampers, radial master rods, and valve clearance.
Turbine Engines
Axial and centrifugal compressors, combustion and turbine sections, compressor stalls, variable stator vanes, spool speeds, FOD, hot and hung starts, and turbine blade creep.
Ignition & Starting Systems
Magneto theory, E-gap, impulse couplings, P-leads, condensers, magneto checks, turbine high-energy igniters, and spark plug fouling and installation.
Propellers
Constant-speed governors, blade angle, feathering, fail-safe pitch behavior, blade tracking, propeller damage limits, turboprop reduction gearing, and dynamic balancing.
Engine Fuel Metering Systems
Float carburetors, carburetor icing, accelerating pumps, continuous-flow fuel injection, mixture leaning, and idle mixture adjustment.
Engine Instrument Systems
Manifold pressure, bourdon-tube pressure gauges, cylinder head temperature thermocouples, tachometers, exhaust gas temperature, and turbine power-setting parameters.
Lubrication Systems
Wet- and dry-sump systems, oil functions, pressure relief valves, scavenge pumps, oil temperature troubleshooting, chip detectors, and oil viscosity.
Engine Electrical Systems
Alternators, voltage regulators, starter-generators, bonding and grounding, wiring harness inspection, circuit breakers, and ignition harness resistance testing.
Induction, Airflow & Engine Cooling Systems
Air-cooled cylinder cooling, baffles and seals, cowl flaps, carburetor heat and alternate air, turbochargers, and wastegate boost control.
Engine Inspection
Differential compression tests, 100-hour and annual inspections, borescope use, Airworthiness Directives, and valve condition assessment.
Engine Fuel Systems
Engine-driven and boost pumps, fuel strainers and contamination, vapor lock, turbine fuel control units, and fuel heaters.
Engine Removal, Installation & Overhaul
Removal preparation and safing, TBO concepts, overhaul dimensional inspection to service limits, post-installation run-up and break-in, and vibration isolation mounts.
Engine Fire Protection
Continuous-loop and thermal-switch fire detection, nacelle fire extinguishing, firewalls, and fire detection system testing.
Engine Exhaust & Reverser Systems
Turbine exhaust systems and nozzles, thrust reversers, and reciprocating exhaust inspection for cracks, leaks, and carbon monoxide hazards.
How to Pass the FAA Aviation Mechanic — Powerplant (AMP) Exam
What You Need to Know
- Passing score: 70%
- Assessment: 100 multiple-choice, 2 hours, 70% to pass, computer-based via PSI (official FAA AMP test, separate from General & Airframe); this practice bank is 100 selected-response items
- Time limit: 2 hours
- Exam fee: ~$175 (PSI testing fee)
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
FAA Aviation Mechanic — Powerplant (AMP) Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the FAA AMT Powerplant (AMP) knowledge test?
The official FAA Aviation Mechanic Powerplant knowledge test, code AMP, has 100 multiple-choice questions. This free practice bank also provides 100 powerplant questions with detailed explanations so you can drill the full range of subject areas.
How much time do I get and what score do I need to pass?
You are given 2 hours to complete the 100-question powerplant test, and you need a score of 70% to pass. The test is delivered by computer through PSI on the FAA airman knowledge testing system.
Is the Powerplant test the same as the General or Airframe test?
No. The mechanic certificate involves three separate FAA knowledge tests: General (AMG), Airframe (AMA), and Powerplant (AMP). The Powerplant test is its own 100-question exam focused on engine and propeller systems and is taken separately from the General and Airframe tests.
What does it cost to take the FAA Powerplant knowledge test?
The PSI testing fee for an FAA airman knowledge test is approximately $175. Confirm the current fee with PSI when you schedule, since fees can change and optional prep materials or retakes add cost.
What are the eligibility requirements to take the Powerplant test?
Eligibility is governed by 14 CFR Part 65. Candidates generally qualify by graduating from an FAA-certificated Aviation Maintenance Technician School or by documenting the required practical maintenance experience, and they must be able to read, write, speak, and understand English.
What subjects are covered on the FAA AMP test?
The Powerplant test follows the FAA-S-ACS-1 Powerplant ACS and covers reciprocating and turbine engines, ignition and starting, propellers, fuel metering and fuel systems, lubrication, electrical, induction/airflow/cooling, instruments, inspection, removal/installation/overhaul, fire protection, and exhaust and reverser systems.