- Overview: What the BEE-DC Exam Actually Tests
- The 12 Content Areas, Explained
- Foundation Domains: Theory, Magnetism, Safety
- Electronics Domains: Equipment and Components
- Math, Ohm's Law, and Measurement Domains
- Circuit Domains: Series, Parallel, and Combination
- Battery Power Supplies
- Mapping Domains to a Study Schedule
- How Domain Knowledge Gets Tested
- Frequently Asked Questions
- BEE-DC covers 12 content areas, from Basic Electrical Theory through Battery Power Supplies.
- The exam is a proctored, in-person performance assessment, not a multiple-choice-only test.
- Candidates must diagnose faults in series, parallel, and series-parallel circuits using real equipment.
- You need a Nida 130E or later trainer, a multimeter, function generator, and oscilloscope to practice properly.
Overview: What the BEE-DC Exam Actually Tests
The Basic Electricity and Electronics Certification - Direct Current (BEE-DC) is issued by Certifying Technical Employee Competence (CertTEC), a division of SpaceTEC Partners, Inc. Unlike a standard knowledge quiz, BEE-DC is delivered as a proctored, in-person performance assessment through SPI's online Examination Management System. That means the 12 content areas below aren't just topics to memorize - they're skills you demonstrate hands-on with a multimeter, function generator, oscilloscope, and a Nida 130E (or later) trainer using two CertTEC assessment circuit cards per discipline.
If you're still deciding whether this certification fits your goals, start with What Is BEE-DC? or BEE-DC Meaning for background before diving into domain specifics. This guide breaks down all 12 domains as published in CertTEC's DC competency topics, based on the SPI catalog revised March 1, 2025.
The 12 Content Areas, Explained
CertTEC organizes the BEE-DC exam around 12 published domains. Some are conceptual (theory, safety, magnetism), while others are directly practical (measurements, circuit types, battery supplies). Here's the full list before we go deeper into each:
| Domain # | Content Area | Nature of Content |
|---|---|---|
| 1 | Basic Electrical Theory | Conceptual foundation |
| 2 | Magnetism | Conceptual foundation |
| 3 | Basic Electrical Safety | Procedural/safety |
| 4 | Electronic Equipment | Applied/tools |
| 5 | Electronic Components | Applied/identification |
| 6 | Ohms Law for Electronics | Calculation-heavy |
| 7 | Basic Mathematics for Electronics | Calculation-heavy |
| 8 | Electronic Measurements | Hands-on practical |
| 9 | Series Circuits for Electronics | Hands-on practical |
| 10 | Parallel Circuits for Electronics | Hands-on practical |
| 11 | Series/Parallel Combination Circuits for Electronics | Hands-on practical |
| 12 | Battery Power Supplies | Applied/systems |
For a broader look at how difficult this full list tends to feel for first-time candidates, see How Hard Is the BEE-DC Exam? Complete Difficulty Guide 2026.
Foundation Domains: Theory, Magnetism, Safety
Domain 1: Basic Electrical Theory
This domain establishes the vocabulary and physics you'll use everywhere else on the exam - voltage, current, resistance, power, and how charge moves through a conductor.
- Relationships between voltage, current, and resistance in DC circuits
- Conductors vs. insulators and their practical implications
- Basic circuit diagrams and schematic symbol recognition
Domain 2: Magnetism
Magnetism underpins how many DC-related components and test instruments function, even in a direct current context.
- Magnetic fields generated by current flow
- Electromagnetic principles relevant to meters and relays
- Basic terminology: flux, poles, and field direction
Domain 3: Basic Electrical Safety
Because the exam is performed on live trainer boards with real equipment, safety isn't theoretical - it's evaluated as part of your hands-on conduct.
- Safe handling of test equipment and circuit cards
- Recognizing hazards before energizing a circuit
- Proper procedures when working with a Nida 130E trainer or similar equipment
Electronics Domains: Equipment and Components
Domain 4: Electronic Equipment
This domain covers the tools you'll actually use during the assessment itself, so familiarity here directly affects your performance-test speed and confidence.
- Correct use of a multimeter for voltage, current, and resistance checks
- Function generator setup for signal input
- Oscilloscope basics for waveform observation
Domain 5: Electronic Components
You'll need to visually and functionally identify components on the CertTEC assessment circuit cards.
- Resistors, capacitors, and basic passive components
- Reading component markings and values
- Recognizing component placement within a circuit card layout
These two domains often surprise candidates who studied theory heavily but under-practiced with physical equipment. If your prep plan is light on hands-on time, revisit BEE-DC Study Guide 2026: How to Pass on Your First Attempt for a more balanced approach.
Math, Ohm's Law, and Measurement Domains
Domain 6: Ohms Law for Electronics
This is arguably the calculation backbone of the entire exam. Expect to apply V=IR repeatedly, then confirm your answer against an actual multimeter reading.
- Solving for voltage, current, or resistance given two known values
- Applying Ohm's Law within series, parallel, and combination circuits
- Cross-checking calculated values against measured values - a core practical focus of the exam
Domain 7: Basic Mathematics for Electronics
Supports Domain 6 with the arithmetic and formula manipulation skills needed to work quickly under proctored conditions.
- Algebraic rearrangement of electrical formulas
- Unit conversions (milliamps, kilohms, etc.)
- Power formula calculations (P=IV and related variants)
Domain 8: Electronic Measurements
This domain is where theory meets the bench. You'll take actual readings and interpret them correctly.
- Correct multimeter probe placement for voltage vs. current measurement
- Reading and interpreting oscilloscope traces
- Identifying measurement errors caused by incorrect meter settings
Circuit Domains: Series, Parallel, and Combination
Domains 9, 10, and 11 form the practical core of the assessment, where you're not just calculating values but tracing faults on a physical circuit card.
Domain 9: Series Circuits for Electronics
Understanding how current, voltage, and resistance behave when components are chained in a single path.
- Total resistance calculations for series arrangements
- Voltage drop distribution across series components
- Identifying an open circuit fault in a series configuration
Domain 10: Parallel Circuits for Electronics
The inverse challenge: multiple current paths sharing the same voltage source.
- Total resistance calculations for parallel branches
- Current division across parallel paths
- Diagnosing a shorted or open branch without disturbing the rest of the circuit
Domain 11: Series/Parallel Combination Circuits for Electronics
This is where the exam gets genuinely demanding - combining series and parallel analysis in a single layout.
- Simplifying combination circuits into equivalent series or parallel sections
- Locating faults when multiple current paths and voltage drops interact
- Applying Domains 6-8 skills together under time pressure
Because these three domains lean so heavily on fault diagnosis with real equipment, they're a frequent focus in discussions about BEE-DC Pass Rate 2026: What the Data Shows and why certain candidates need a second attempt.
Battery Power Supplies
Domain 12: Battery Power Supplies
The final domain shifts from analysis to systems - understanding how batteries function as DC power sources in practical equipment.
- Battery voltage, capacity, and configuration basics
- Series vs. parallel battery arrangements and their effect on total voltage or capacity
- Basic charging and safety considerations for battery power supplies
This domain rounds out the certification's practical scope - many roles that value BEE-DC, from field service technicians to equipment maintainers, work directly with battery-powered DC systems. See BEE-DC Jobs for a sense of where this domain knowledge gets applied on the job.
Mapping Domains to a Study Schedule
Rather than studying all 12 domains simultaneously, group them by how they build on each other. Foundational domains come first, calculation domains second, and hands-on circuit domains last - since those require the most repetition with physical equipment.
Foundation & Safety
- Domain 1: Basic Electrical Theory
- Domain 2: Magnetism
- Domain 3: Basic Electrical Safety
Tools & Components
- Domain 4: Electronic Equipment
- Domain 5: Electronic Components
Math & Measurement
- Domain 6: Ohms Law for Electronics
- Domain 7: Basic Mathematics for Electronics
- Domain 8: Electronic Measurements
Circuits & Batteries
- Domain 9: Series Circuits
- Domain 10: Parallel Circuits
- Domain 11: Series/Parallel Combination Circuits
- Domain 12: Battery Power Supplies
This sequencing works because you can't confidently diagnose faults in combination circuits (Domain 11) without solid Ohm's Law fluency (Domain 6) and comfort with a multimeter (Domain 8) first. For a more detailed week-by-week plan, see BEE-DC Study Guide 2026: How to Pass on Your First Attempt.
Key Takeaway
Don't study circuit domains (9-11) until you're comfortable with Ohm's Law (Domain 6) and multimeter use (Domain 8) - they depend directly on those skills.
How Domain Knowledge Gets Tested
BEE-DC isn't a paper exam covering these 12 domains abstractly - it's a proctored, in-person performance assessment. You'll work with two CertTEC assessment circuit cards per discipline, using a Nida 130E or later trainer alongside a multimeter, function generator, and oscilloscope. The exam fee is USD 100 per certification, and a 70% score is required to pass.
Eligibility to sit for the exam comes through relevant training or work experience, a relevant military rating or assignment, or graduation from a relevant college or technical-school program - so most candidates arrive with some domain exposure already. Full eligibility details are covered in BEE-DC Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Once earned, the certification is valid for 3 years. Renewal can happen through verified relevant employment during at least 12 of the preceding 36 months, accumulating at least 18 Alternate Recertification Credits within the certification period, or passing an equivalent knowledge exam. Renewal fees vary: USD 10 for an emailed work-verification certificate, USD 25 for a mailed hard copy and/or ID card, USD 15 for the credit route, or USD 50 for the knowledge exam route. For a full cost breakdown across initial certification and renewal, see BEE-DC Certification Cost 2026: Complete Pricing Breakdown.
If you want to see exactly how the 70% threshold is calculated and what it means in practice, read BEE-DC Passing Score 2026: Exactly What You Need to Pass. And if scheduling logistics around the proctored format are your main concern, check BEE-DC Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Before your exam day, a quick review pass through all 12 domains can help confirm nothing slipped through the cracks - the BEE-DC Cheat Sheet 2026: One-Page Review of Must-Know Facts is built for exactly that kind of final check. You can also run through realistic domain-based questions on our practice test platform to see how comfortable you are with each content area before booking your exam slot.
For candidates still weighing whether the time and cost are worth it given their career goals, Is the BEE-DC Certification Worth It? Complete ROI Analysis 2026 and BEE-DC Salary Guide 2026: Complete Earnings Analysis offer additional context beyond the domain content itself.
Frequently Asked Questions
BEE-DC covers 12 published content areas, ranging from Basic Electrical Theory and Magnetism through Battery Power Supplies, following CertTEC's DC competency topics.
Domains 8 through 11 - Electronic Measurements, Series Circuits, Parallel Circuits, and Series/Parallel Combination Circuits - require the most direct work with a multimeter, function generator, and oscilloscope on the trainer board.
Domains 6 and 7 focus on applying Ohm's Law and basic electronics math accurately and quickly, since your calculated values are checked against actual multimeter readings during the performance assessment.
Domain 3, Basic Electrical Safety, is part of the published content areas, and because the exam is performed on live trainer boards, safe handling practices are relevant throughout the hands-on portions.
Practice with a multimeter, function generator, oscilloscope, and ideally a Nida 130E or later trainer, since these are the exact tools used during the proctored performance assessment.