- What the SpaceTEC Core Exam Actually Tests
- Exam Format: Written, Oral, and Practical
- All 6 Domains at a Glance
- Domain 1: Introduction to Aerospace (10%)
- Domain 2: Aerospace Safety (16%)
- Domain 3: Applied Mechanics (20%)
- Domain 4: Basic Electricity (14%)
- Domain 5: Materials and Processes I and II (20%)
- Domain 6: Tests and Measurements (20%)
- How Domain Weighting Should Drive Your Prep
- A Domain-Aligned Study Schedule
- Frequently Asked Questions
- The SpaceTEC Core exam spans 6 domains across a 70-question written test plus a 3-4 hour oral/practical component.
- Applied Mechanics, Materials and Processes I and II, and Tests and Measurements each carry 20% of the written exam - together they represent 60% of your score.
- Aerospace Safety at 16% is the fourth-largest domain and tests real workplace protocols, not theory alone.
- Certification is valid for 3 years; renewal requires work verification, 18 aerospace credits, or an equivalent knowledge exam.
What the SpaceTEC Core Exam Actually Tests
The SpaceTEC Certified Aerospace Technician Core credential is not a knowledge trivia contest. It is a multi-component assessment designed to verify that you can function safely and effectively on an aerospace shop floor or launch facility. Every domain in the exam maps to something a working technician encounters - from reading a torque specification to diagnosing an electrical circuit to selecting the correct fastener material for a structural joint.
Understanding what each domain covers - and why it carries the weight it does - is the foundation of any intelligent study plan. This guide breaks down all six content areas, explains their relative importance, and shows you how to allocate your preparation time so the highest-value topics receive the most attention.
For context on how the exam compares in difficulty to other credentials in the sector, see our complete difficulty guide for the SpaceTEC Core Exam 2026.
Exam Format: Written, Oral, and Practical
Before diving into domains, it helps to understand exactly what you are preparing for. The SpaceTEC Core assessment has three distinct components:
- 70-question computer-based written exam with a 90-minute time limit
- Oral component conducted by an approved examiner
- Practical performance component that runs approximately 3-4 hours in total
The six domains discussed throughout this article govern the written portion. However, the oral and practical components draw on the same subject matter - which means mastering a domain conceptually is necessary but not sufficient. You also need to be able to explain your reasoning aloud and demonstrate hands-on competence.
Eligibility is intentionally broad. Candidates can qualify through aerospace-related training or work experience, active-duty or veteran military backgrounds, an FAA A&P certificate or comparable technical credential, or graduation from an appropriate college or technical program. That range reflects the credential's purpose: it is designed for people already working in or transitioning into the aerospace industry, not students starting from zero.
All 6 Domains at a Glance
| Domain | Topic Area | Exam Weight | Approx. Questions (of 70) |
|---|---|---|---|
| 1 | Introduction to Aerospace | 10% | ~7 |
| 2 | Aerospace Safety | 16% | ~11 |
| 3 | Applied Mechanics | 20% | ~14 |
| 4 | Basic Electricity | 14% | ~10 |
| 5 | Materials and Processes I and II | 20% | ~14 |
| 6 | Tests and Measurements | 20% | ~14 |
The three 20% domains - Applied Mechanics, Materials and Processes, and Tests and Measurements - together account for roughly 42 of the 70 questions on the written exam. That concentration is deliberate. These are the technical competencies that separate a qualified aerospace technician from someone with general mechanical aptitude.
Domain 1: Introduction to Aerospace (10%)
Domain 1: Introduction to Aerospace
This domain establishes the foundational vocabulary, history, and structural understanding of the aerospace industry that informs every other domain on the exam.
- Aerospace industry segments: commercial aviation, defense, space launch, and satellite systems
- Key regulatory bodies and their roles (FAA, NASA, DoD, commercial launch operators)
- Aerospace vehicle categories: fixed-wing, rotary-wing, launch vehicles, spacecraft
- Aerospace technician career paths and the purpose of the SpaceTEC credential itself
- Basic aerodynamic principles: lift, drag, thrust, and weight in context
At 10%, Domain 1 contributes approximately 7 questions to your score. It is the lightest domain by weight, but candidates who underestimate it sometimes find themselves stumped by foundational vocabulary in other domains. A solid grounding here makes Domains 3, 5, and 6 easier to absorb.
For a deeper look at everything this domain covers, see our SpaceTEC Core Domain 1: Introduction to Aerospace complete study guide.
Domain 2: Aerospace Safety (16%)
Domain 2: Aerospace Safety
Aerospace Safety is the second-largest domain and one of the most practically oriented - examiners will probe your knowledge of real workplace hazard controls, not just regulatory definitions.
- Hazardous materials handling: identification, storage, and disposal under aerospace shop conditions
- Personal protective equipment selection and proper use in aerospace environments
- Lockout/tagout (LOTO) procedures and energy control protocols
- Foreign Object Damage/Debris (FOD) prevention programs and detection practices
- Fire safety, emergency response, and evacuation procedures specific to aerospace facilities
- OSHA standards as applied to aerospace manufacturing and maintenance environments
With 16% weight - roughly 11 questions - Aerospace Safety is not a domain to skim. Many candidates with strong technical backgrounds assume they can wing safety questions based on common sense. That approach tends to fail on specifics: the correct order of operations for a LOTO procedure, the precise PPE required for a specific chemical class, or the proper FOD reporting chain at a launch site.
The oral and practical components of the exam often probe safety directly, making this domain doubly important. A candidate who cannot explain a hazard control protocol to an examiner will struggle even if they answered the written questions correctly.
Explore the full scope of this domain in our SpaceTEC Core Domain 2: Aerospace Safety complete study guide.
Domain 3: Applied Mechanics (20%)
Domain 3: Applied Mechanics
Applied Mechanics is one of the three co-equal heavyweights of the exam. Expect calculation-based questions alongside conceptual ones - this domain rewards candidates who can work through problems, not just recall definitions.
- Forces, vectors, and resultant force calculations
- Torque, moments, and mechanical advantage in fastening and rigging applications
- Stress and strain: tension, compression, shear, torsion, and bending in aerospace structures
- Simple machines and their application in aerospace tooling and ground support equipment
- Fluid mechanics basics: pressure, flow rates, and hydraulic/pneumatic system principles
- Thermodynamics fundamentals relevant to propulsion and environmental control systems
Applied Mechanics at 20% demands approximately 14 written questions - and the practical component will likely include hands-on scenarios involving mechanical principles. If your background is electronics-heavy or documentation-focused rather than hands-on mechanical work, allocate extra study time here early.
Our SpaceTEC Core Domain 3: Applied Mechanics complete study guide walks through every sub-topic with worked examples.
Domain 4: Basic Electricity (14%)
Domain 4: Basic Electricity
At 14%, Basic Electricity is the smallest technical domain - but it underpins every electrical system on any aerospace vehicle, from ground support equipment to avionics.
- Ohm's Law, Kirchhoff's Voltage Law, and Kirchhoff's Current Law applied to aerospace circuits
- Series, parallel, and series-parallel circuit analysis
- Electrical power calculations (watts, volts, amperes, resistance)
- AC versus DC fundamentals: frequency, waveforms, and applications in aerospace systems
- Capacitors and inductors: basic behavior and common aerospace applications
- Electrical safety: grounding, bonding, arc flash, and static discharge in aerospace environments
- Wire types, connectors, and crimping standards used in aerospace wiring harnesses
Candidates with a military electronics background or an FAA A&P will likely find Domain 4 familiar territory. Others should treat it as a focused, bounded topic where solid fundamentals yield reliable points. The electrical safety sub-topics also connect back to Domain 2, so your study efforts compound.
For a focused breakdown, see our SpaceTEC Core Domain 4: Basic Electricity complete study guide.
Domain 5: Materials and Processes I and II (20%)
Domain 5: Materials and Processes I and II
This domain spans both the properties of aerospace materials and the processes used to shape, join, and inspect them - making it one of the broadest and most detail-intensive areas on the exam.
- Metallic materials: aluminum alloys, titanium, steel, and their heat treatment specifications
- Composite materials: carbon fiber, fiberglass, and aramid constructions; lay-up and curing processes
- Fastener identification, selection, and installation standards (AN, MS, NAS specifications)
- Welding, brazing, and soldering processes relevant to aerospace fabrication
- Surface treatment and corrosion protection: anodizing, plating, painting, and sealants
- Non-destructive testing (NDT) methods: visual inspection, dye penetrant, magnetic particle, and ultrasonic testing basics
- Material certificates, traceability requirements, and quality documentation
Materials and Processes I and II earns its 20% weight because it directly governs how technicians make decisions at the workbench. Choosing the wrong fastener material, applying the wrong surface treatment, or misidentifying a composite repair method can cause catastrophic structural failure. Examiners know this, and the questions reflect it.
The NDT sub-topics in this domain also overlap with Domain 6 (Tests and Measurements), so studying them together is efficient. See our SpaceTEC Core Domain 5: Materials and Processes I and II complete study guide for the full treatment.
Domain 6: Tests and Measurements (20%)
Domain 6: Tests and Measurements
Tests and Measurements covers the instruments, procedures, and data interpretation skills that aerospace technicians use daily to verify that systems and components meet specification.
- Precision measurement tools: micrometers, calipers, dial indicators, and their calibration requirements
- Multimeters, oscilloscopes, and other electrical test instruments: proper use and reading interpretation
- Calibration standards, traceability to NIST, and out-of-tolerance procedures
- Pressure, temperature, and flow measurement in aerospace systems testing
- Data recording requirements, test documentation, and acceptance/rejection criteria
- Statistical process control basics: understanding tolerances and measurement uncertainty
- Functional testing procedures for mechanical and electrical assemblies
Domain 6 is where abstract knowledge becomes demonstrable skill. The practical component of the SpaceTEC Core exam is particularly likely to test measurement competencies directly - you may be asked to use a micrometer, read a multimeter, or document a test result according to a given procedure. Written preparation alone is insufficient here.
Our SpaceTEC Core Domain 6: Tests and Measurements complete study guide covers every instrument category and common question patterns.
How Domain Weighting Should Drive Your Prep
Treating all six domains equally is one of the most common and costly mistakes candidates make. The math is straightforward: if you improve your score in a 20% domain by 10 percentage points, that is twice the impact of the same improvement in a 10% domain.
That said, do not ignore the smaller domains. Domain 2 (Aerospace Safety) at 16% adds up to roughly 11 questions - more than enough to swing a borderline result. And the oral/practical components can probe any domain regardless of written weight.
For additional perspective on how candidates typically perform and where difficulty spikes occur, our SpaceTEC Core Pass Rate 2026 analysis offers qualitative insight based on the exam's structure.
A Domain-Aligned Study Schedule
Foundations: Domains 1 and 2
- Work through Domain 1 (Introduction to Aerospace) in 2-3 sessions to build vocabulary
- Begin Domain 2 (Aerospace Safety) with particular focus on LOTO, FOD, and hazmat handling
- Take a baseline diagnostic using SpaceTEC Core practice questions to identify weak areas early
Heavy Hitter: Domain 3 Applied Mechanics
- Dedicate this week entirely to Applied Mechanics - work problems, not just definitions
- Practice force vector calculations and torque problems until they feel automatic
- Review fluid mechanics and thermodynamics sub-topics in final sessions
Technical Core: Domains 4 and 5
- Cover Basic Electricity early in the week - bounded topic, achievable in 3-4 sessions
- Transition to Materials and Processes I and II for the remainder; prioritize fastener specs and NDT methods
- Begin connecting NDT content to Domain 6 measurement instruments
Practical Mastery: Domain 6 and Full Review
- Complete Tests and Measurements study with hands-on instrument practice if possible
- Run full 70-question timed practice exams to simulate written component conditions
- Review oral/practical scenarios for Safety, Mechanics, and Measurement domains
This schedule assumes roughly four weeks of active preparation. Candidates with extensive hands-on aerospace experience may compress Weeks 2-4; those transitioning from unrelated fields should expand each phase. For a more detailed approach to pacing and resource selection, see our SpaceTEC Core Study Guide 2026: How to Pass on Your First Attempt.
Key Takeaway
Run timed 70-question practice exams in the final week of prep. The 90-minute written limit is approximately 1.3 minutes per question - tight enough that test-taking pace matters. Use full-length SpaceTEC Core practice tests to build that pacing instinct before exam day.
Understanding the domains thoroughly also prepares you for the longer career conversation. The SpaceTEC Core credential opens doors to aerospace manufacturing, launch operations, defense contractors, and MRO facilities. For a full picture of where this certification leads professionally, our SpaceTEC Core Career Paths guide covers the industries and roles in detail.
Most candidates find Applied Mechanics (Domain 3) and Materials and Processes I and II (Domain 5) the most challenging because they combine calculation-based questions with broad technical detail. Both carry 20% weight, so they also have the highest impact on your score.
Based on published weights: Domain 1 (10%) ≈ 7 questions; Domain 2 (16%) ≈ 11; Domain 3 (20%) ≈ 14; Domain 4 (14%) ≈ 10; Domain 5 (20%) ≈ 14; Domain 6 (20%) ≈ 14. Actual distribution may vary slightly by exam version.
Yes. The oral and practical components draw on the same six domain areas. Safety, Applied Mechanics, Materials and Processes, and Tests and Measurements are particularly well-suited to hands-on and verbal demonstration, so expect all domains to appear across all three assessment components.
Skipping it is inadvisable. Domain 1 establishes the vocabulary and industry context that underlies every other domain. Gaps here tend to cause confusion on terminology-heavy questions throughout the rest of the exam. Two to three focused study sessions is usually sufficient to cover it thoroughly.
SpaceTEC Core certification is valid for 3 years. Renewal options include verification of ongoing aerospace work experience, completion of 18 aerospace-related academic credits, or passing an equivalent knowledge exam. Choose the path that best aligns with your professional situation at renewal time.
Ready to Start Practicing?
Now that you know exactly what all six SpaceTEC Core domains cover and how they're weighted, the next step is testing your knowledge under realistic conditions. Our practice tests are built around the same domain structure - Applied Mechanics, Materials and Processes, Tests and Measurements, and all the rest - so every question you answer moves you closer to passing the actual exam.
Start Free Practice Test