NCATT AET
Aviation Electronics Technician
Certification Examination
2026/2027 Comprehensive Practice Assessment
100 Questions | Questions & Correct Answers | Verified Competency
───────────────────────────────────────────────────────
Certification: NCATT AET – National Center for Aerospace &
Transportation Technologies
Examination Type: Aviation Electronics Technician Certification
Number of Questions: 100 Multiple-Choice Questions
Question Format: Single-best-answer, calculation-based, and
scenario-based
Testing Time: Approximately 2–3 hours (computer-based,
proctored)
Passing Score: 70–75% (per NCATT certification policy)
Regulatory Alignment: FAA 14 CFR Parts 43, 65, 145 | AC 43.13-1B |
ARINC Standards
, NCATT AET Certification Practice Examination
1. Introduction
This NCATT AET Aviation Electronics Technician Certification Examination practice assessment for
2026/2027 reflects a comprehensive competency evaluation designed to measure proficiency in
foundational and advanced avionics principles for candidates pursuing National Center for Aerospace
& Transportation Technologies certification. The examination assesses knowledge spanning circuit
theory, digital and analog electronics, aircraft power systems, communication and navigation
equipment, automatic flight controls, instrumentation, wiring standards, ESD safety, and
troubleshooting methodologies essential for safe and compliant avionics maintenance practice.
The 100-question format provides extensive coverage of high-yield AET domains aligned with current
NCATT task analysis, FAA regulations (14 CFR Parts 43, 65, and 145), FAA Advisory Circular 43.13-1B
(Acceptable Methods, Techniques, and Practices), and industry standards including ARINC
specifications. Questions evaluate both theoretical understanding and practical application of avionics
principles.
Each question is accompanied by a detailed evidence-based rationale explaining the underlying
avionics principle, regulatory reference, or technical reasoning. Rationales incorporate specific
numerical values, FAA citations, and technical specifications from standard reference materials.
2. Content Domains Overview
The 100 questions span 11 core NCATT AET competency domains:
Domain Q Range Key Topics
DC & AC Circuit Analysis 1–26 Ohm's/Kirchhoff's Laws, RLC
circuits, resonance, impedance,
power
Analog & Digital 2, 9, 13, 18, 27–34, 49–50 Diodes, transistors, op-amps,
Electronics logic gates, flip-flops,
ADC/DAC
Aircraft Electrical Power 3, 16, 35–36 Generation, distribution,
batteries, inverters, GCU,
CSD/IDG
Communication Systems 6, 10, 17, 56–60 VHF/UHF/HF, SATCOM,
SELCAL, transponder, TCAS,
modulation
Navigation Systems 4, 7, 12, 37–40, 76–80 VOR, ILS, GPS/GNSS, ADF,
DME, ADS-B, ARINC data
buses
Radar & Surveillance 41–55, 66–70 Primary/secondary radar,
microwave, waveguide,
antenna, fiber optics
Automatic Flight Control 14, 71–75 Autopilot servos, sensors, flight
director, yaw damper,
GPWS/TAWS
Instrumentation & 8, 19, 81–85 Pitot-static, EFIS, EICAS, cabin
Displays pressurization controllers
Wiring & Interconnection 5, 46–48, 61–65 AC 43.13-1B, MIL-W-22759,
shielding, connectors, crimping
ESD Safety & Fire/Fuel 15, 86–95 ESD prevention, fire detection,
smoke detectors, fuel quantity
Troubleshooting & FAA 20, 96–100 Signal tracing, split-half, BITE,
14 CFR Parts 43/65/145
Page 2
, NCATT AET Certification Practice Examination
3. Examination Questions
The following 100 questions are in NCATT-aligned format. Correct answers in bold green. Each
includes a detailed evidence-based rationale.
3.1 DC & AC Circuit Analysis
Questions 1–26
Question 1. In a series circuit with three resistors (10Ω, 20Ω, 30Ω) connected to a 12V
source, what is the total current?
A. 0.2 A
B. 0.5 A
C. 2 A
D. 6 A
Rationale: Total resistance = 10+20+30 = 60Ω. I = V/R = 12/60 = 0.2A.
··················
Question 2. Which component allows current to flow in only one direction?
A. Resistor
B. Capacitor
C. Diode
D. Inductor
Rationale: A diode is a semiconductor device that permits current flow in the forward direction
while blocking it in the reverse direction.
··················
Question 3. What is the primary function of an inverter in an aircraft electrical system?
A. Convert AC to DC
B. Convert DC to AC
C. Step up voltage
D. Store electrical energy
Rationale: An inverter converts DC from the battery or DC bus into AC to power AC loads.
··················
Question 4. Which navigation system provides precision lateral and vertical guidance
for landing?
A. VOR
B. NDB
C. ILS
D. DME
Rationale: ILS provides precision guidance via Localizer (lateral) and Glideslope (vertical)
beams.
··················
Question 5. According to AC 43.13-1B, what is the maximum allowable temperature for
soldering avionics connectors?
A. 200°F (93°C)
B. 400°F (204°C)
C. 600°F (315°C)
D. 800°F (427°C)
Rationale: AC 43.13 recommends keeping soldering temperatures generally below 600°F, but
sensitive avionics work targets around 400-500°F.
··················
Page 3
Aviation Electronics Technician
Certification Examination
2026/2027 Comprehensive Practice Assessment
100 Questions | Questions & Correct Answers | Verified Competency
───────────────────────────────────────────────────────
Certification: NCATT AET – National Center for Aerospace &
Transportation Technologies
Examination Type: Aviation Electronics Technician Certification
Number of Questions: 100 Multiple-Choice Questions
Question Format: Single-best-answer, calculation-based, and
scenario-based
Testing Time: Approximately 2–3 hours (computer-based,
proctored)
Passing Score: 70–75% (per NCATT certification policy)
Regulatory Alignment: FAA 14 CFR Parts 43, 65, 145 | AC 43.13-1B |
ARINC Standards
, NCATT AET Certification Practice Examination
1. Introduction
This NCATT AET Aviation Electronics Technician Certification Examination practice assessment for
2026/2027 reflects a comprehensive competency evaluation designed to measure proficiency in
foundational and advanced avionics principles for candidates pursuing National Center for Aerospace
& Transportation Technologies certification. The examination assesses knowledge spanning circuit
theory, digital and analog electronics, aircraft power systems, communication and navigation
equipment, automatic flight controls, instrumentation, wiring standards, ESD safety, and
troubleshooting methodologies essential for safe and compliant avionics maintenance practice.
The 100-question format provides extensive coverage of high-yield AET domains aligned with current
NCATT task analysis, FAA regulations (14 CFR Parts 43, 65, and 145), FAA Advisory Circular 43.13-1B
(Acceptable Methods, Techniques, and Practices), and industry standards including ARINC
specifications. Questions evaluate both theoretical understanding and practical application of avionics
principles.
Each question is accompanied by a detailed evidence-based rationale explaining the underlying
avionics principle, regulatory reference, or technical reasoning. Rationales incorporate specific
numerical values, FAA citations, and technical specifications from standard reference materials.
2. Content Domains Overview
The 100 questions span 11 core NCATT AET competency domains:
Domain Q Range Key Topics
DC & AC Circuit Analysis 1–26 Ohm's/Kirchhoff's Laws, RLC
circuits, resonance, impedance,
power
Analog & Digital 2, 9, 13, 18, 27–34, 49–50 Diodes, transistors, op-amps,
Electronics logic gates, flip-flops,
ADC/DAC
Aircraft Electrical Power 3, 16, 35–36 Generation, distribution,
batteries, inverters, GCU,
CSD/IDG
Communication Systems 6, 10, 17, 56–60 VHF/UHF/HF, SATCOM,
SELCAL, transponder, TCAS,
modulation
Navigation Systems 4, 7, 12, 37–40, 76–80 VOR, ILS, GPS/GNSS, ADF,
DME, ADS-B, ARINC data
buses
Radar & Surveillance 41–55, 66–70 Primary/secondary radar,
microwave, waveguide,
antenna, fiber optics
Automatic Flight Control 14, 71–75 Autopilot servos, sensors, flight
director, yaw damper,
GPWS/TAWS
Instrumentation & 8, 19, 81–85 Pitot-static, EFIS, EICAS, cabin
Displays pressurization controllers
Wiring & Interconnection 5, 46–48, 61–65 AC 43.13-1B, MIL-W-22759,
shielding, connectors, crimping
ESD Safety & Fire/Fuel 15, 86–95 ESD prevention, fire detection,
smoke detectors, fuel quantity
Troubleshooting & FAA 20, 96–100 Signal tracing, split-half, BITE,
14 CFR Parts 43/65/145
Page 2
, NCATT AET Certification Practice Examination
3. Examination Questions
The following 100 questions are in NCATT-aligned format. Correct answers in bold green. Each
includes a detailed evidence-based rationale.
3.1 DC & AC Circuit Analysis
Questions 1–26
Question 1. In a series circuit with three resistors (10Ω, 20Ω, 30Ω) connected to a 12V
source, what is the total current?
A. 0.2 A
B. 0.5 A
C. 2 A
D. 6 A
Rationale: Total resistance = 10+20+30 = 60Ω. I = V/R = 12/60 = 0.2A.
··················
Question 2. Which component allows current to flow in only one direction?
A. Resistor
B. Capacitor
C. Diode
D. Inductor
Rationale: A diode is a semiconductor device that permits current flow in the forward direction
while blocking it in the reverse direction.
··················
Question 3. What is the primary function of an inverter in an aircraft electrical system?
A. Convert AC to DC
B. Convert DC to AC
C. Step up voltage
D. Store electrical energy
Rationale: An inverter converts DC from the battery or DC bus into AC to power AC loads.
··················
Question 4. Which navigation system provides precision lateral and vertical guidance
for landing?
A. VOR
B. NDB
C. ILS
D. DME
Rationale: ILS provides precision guidance via Localizer (lateral) and Glideslope (vertical)
beams.
··················
Question 5. According to AC 43.13-1B, what is the maximum allowable temperature for
soldering avionics connectors?
A. 200°F (93°C)
B. 400°F (204°C)
C. 600°F (315°C)
D. 800°F (427°C)
Rationale: AC 43.13 recommends keeping soldering temperatures generally below 600°F, but
sensitive avionics work targets around 400-500°F.
··················
Page 3
