100+ Free CAET Practice Questions
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Key Facts: CAET Exam
100 questions
Exam Length
AEA CAET
90 minutes
Time Limit
AEA CAET
70%
Passing Score
AEA CAET
8 areas
Content Domains
AEA CAET outline
ASTM Level 1
Standard Alignment
AEA / ASTM
Every 3 years
Renewal Interval
AEA CAET
3 attempts
Included per Purchase
AEA CAET
The CAET is the AEA's entry-level avionics technician certification, aligned with Level 1 of the ASTM aircraft electronics technician standard and intended for newcomers to the avionics trade (no prerequisites). The exam is 100 multiple-choice questions, 90 minutes, with a 70% pass mark; a purchase includes three attempts ($119 remote proctored, $109 in person), and the credential renews every three years. It tests eight areas: maintenance procedures and FAR/Part 43 regulatory requirements, basic DC/AC electrical theory and solid-state/digital fundamentals, communication-navigation-surveillance systems (VHF comm, VOR/ILS, GPS, DME, transponders, Mode S, ADS-B 1090ES/978 UAT, TCAS, ELT), flight instruments and pitot-static systems (including the 24-month FAR 91.411/91.413 checks), digital databus systems (ARINC 429, CAN, ARINC 664/AFDX, MIL-STD-1553), aircraft wiring and installation per AC 43.13-1B, tools and test equipment, and safety, housekeeping, and human factors. An AET-to-CAET upgrade exam exists for legacy NCATT AET holders.
Sample CAET Practice Questions
Try these sample questions to test your CAET exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A resistor carries 0.5 A when 12 V is applied across it. What is its resistance?
2Three resistors of 10 ohms, 20 ohms, and 30 ohms are connected in series across a 12 V source. What is the total circuit current?
3Two 100 ohm resistors are connected in parallel. What is the equivalent resistance?
4A 28 V DC bus supplies a load that draws 7 A. How much power does the load consume?
5In a capacitor, the property that opposes a change in voltage and stores energy in an electric field is best described as:
6In an AC circuit, the total opposition to current flow that combines resistance and reactance is called:
7A semiconductor diode in a circuit is intended to allow current to flow in only one direction. When the diode is forward biased, the anode is at a potential that is:
8Which logic gate produces a HIGH output only when ALL of its inputs are HIGH?
9A technician measures 0 V across a load that should be energized, and full source voltage across an in-line switch that is closed. The most likely fault is:
10The transformer in an avionics power supply has 200 primary turns and 50 secondary turns. If 120 V AC is applied to the primary, the ideal secondary voltage is:
About the CAET Exam
The Certified Aircraft Electronics Technician (CAET) is the Aircraft Electronics Association's entry-level avionics technician credential, aligned with Level 1 of the ASTM aircraft electronics technician standard. The exam is 100 multiple-choice questions in 90 minutes with a 70% passing score, delivered remote proctored or in person. It validates foundational knowledge across eight areas: maintenance procedures and regulations, basic electrical theory, CNS systems, flight instruments and pitot-static systems, digital databus systems, aircraft wiring and installation, tools and test equipment, and safety and human factors. It has no prerequisites and requires renewal every three years.
Questions
100 scored questions
Time Limit
90 minutes
Passing Score
70%
Exam Fee
$119 remote proctored / $109 in-person (includes 3 attempts) (Aircraft Electronics Association (AEA))
CAET Exam Content Outline
Basic Electrical Theory & Systems
Ohm's law and the power formula, series and parallel DC circuits, Kirchhoff's current law, AC theory with impedance and inductive/capacitive reactance, transformers and turns ratio, capacitors and inductors, diodes and transistor switching, digital logic gates, and the resistor color code
Communication, Navigation & Surveillance (CNS)
VHF comm (118.000-136.975 MHz with 8.33 kHz spacing) and sidetone, VOR azimuth via reference/variable phase, ILS localizer and glideslope (329-335 MHz), GPS (four-satellite 3-D fix), DME pulse timing, ADF/NDB, transponders (interrogate 1030 MHz, reply 1090 MHz), Mode S 24-bit address, ADS-B 1090ES and 978 UAT, TCAS resolution advisories, 406 MHz ELT, and weather radar
Aircraft Wiring, Hardware & Installation
AC 43.13-1B practices: stripping without nicking strands, crimp versus solder and vibration fatigue, routing bundles above fluid lines, chafe protection with grommets and clamps, lacing/tying without deforming insulation, AWG sizing and voltage drop, bonding/grounding and shield single-point grounds, coax connectors and VSWR, heat-shrink, service loops, wire marking, and antenna ground planes
Maintenance Procedures & Regulatory Requirements
14 CFR Part 43 maintenance records (43.9) and return to service, Airworthiness Directives under Part 39, STC and Form 337 major alterations, TSO/PMA parts eligibility and traceability, Instructions for Continued Airworthiness, approved/acceptable technical data, post-installation operational checks, and systematic troubleshooting
Flight Instruments & Pitot-Static Systems
Pitot-static instruments and ram-versus-static pressure, the 24-calendar-month FAR 91.411 static/altimeter and 91.413 transponder checks, the 29.92 in Hg pressure-altitude datum, blocked static/pitot fault effects, gyroscopic and vacuum-driven instruments, AHRS with MEMS sensors and magnetometers, air data computers, and EFIS/PFD displays
Digital Databus Systems
ARINC 429 single-source twisted pair (32-bit word, 8-bit label, SDI, SSM, odd parity, 12.5 kbps low / 100 kbps high speed), CAN bus differential signaling with 120-ohm end termination, ARINC 664/AFDX switched Ethernet with redundant networks, MIL-STD-1553 command/response bus controller architecture, and databus troubleshooting
Tools, Test Equipment & Measurement
Calibrated crimp tools and torque wrenches, connecting a multimeter in series for current, megohmmeter insulation-resistance testing, pitot-static ramp testers for the 91.411 check, transponder ramp testers for Mode A/C and 1090 MHz reply, oscilloscopes for ARINC 429 BPRZ waveforms, and calibration traceability
Safety, Housekeeping & Human Factors
De-energizing and electrical lockout before work, ESD protection of CMOS/semiconductor boards, RF radiation safety around operating weather radar, Foreign Object Damage (FOD) control and tool accountability, soldering ventilation and lead handling, and the human-factors Dirty Dozen including fatigue and lack of communication
How to Pass the CAET Exam
What You Need to Know
- Passing score: 70%
- Exam length: 100 questions
- Time limit: 90 minutes
- Exam fee: $119 remote proctored / $109 in-person (includes 3 attempts)
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
CAET Study Tips from Top Performers
Frequently Asked Questions
What is the CAET certification?
The Certified Aircraft Electronics Technician (CAET) is the Aircraft Electronics Association's entry-level avionics technician credential, aligned with Level 1 of the ASTM aircraft electronics technician standard. It validates foundational knowledge across electrical theory, CNS systems, wiring, instruments, databuses, regulations, test equipment, and safety.
How is the CAET exam structured?
The CAET exam has 100 multiple-choice questions and a 90-minute time limit, with a passing score of 70%. It is delivered remote proctored online or in person, and a single purchase includes up to three attempts.
How much does the CAET cost and how many attempts do I get?
The remote-proctored exam is $119 and the in-person exam is $109, with up to three attempts included. There is a 24-hour wait between the first and second attempts and a two-week wait between the second and third attempts.
Are there prerequisites for the CAET?
No. The CAET is designed for entry-level avionics technicians and has no formal prerequisites, making it a common starting point for those entering the avionics maintenance field.
What topics does the CAET exam cover?
The exam covers eight areas: maintenance procedures and regulatory requirements, basic electrical theory, communication/navigation/surveillance (CNS) systems, flight instruments and pitot-static systems, digital databus systems, aircraft wiring and installation, tools and test equipment, and safety and human factors.
How is the CAET different from the older NCATT AET?
The CAET is the AEA's current avionics technician certification aligned with the ASTM standard, while the NCATT AET was administered separately (by SpaceTEC). The AEA offers an AET-to-CAET upgrade exam so existing AET holders can move to the CAET credential.
How long is the CAET valid?
The CAET must be renewed every three years to keep the certification current.