TDLR Journeyman Electrician Test: Your Ultimate Guide to Exam Success
If you are preparing for the TDLR Journeyman Electrician Test, understanding the exam structure and practicing real test questions is essential. The Texas Department of Licensing and Regulation (TDLR) ensures that electricians have the right skills and knowledge before granting a license. This guide provides an in-depth overview of the test and includes a practice exam with over 50 questions and an answer key to help you assess your readiness.
Table of Contents
What is the TDLR Journeyman Electrician Test?
The TDLR Journeyman Electrician Test is designed to evaluate your knowledge of electrical theory, safety standards, and practical wiring skills. Passing this test is mandatory for anyone seeking a journeyman electrician license in Texas. The exam focuses on the National Electrical Code (NEC), state regulations, and best practices in electrical work.
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The test typically includes multiple-choice questions, scenario-based problems, and calculations. A strong understanding of both theory and hands-on electrical work is essential.
Key Areas Covered in the TDLR Journeyman Electrician Test
Understanding the areas covered in the test helps in focused preparation. The main categories are:
Electrical Theory and Principles
- Ohm’s Law, voltage, current, and resistance
- Power calculations
- AC and DC circuits
- Series and parallel circuits
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National Electrical Code (NEC)
- Wiring methods
- Conduit and cable installation
- Grounding and bonding
- Overcurrent protection
Safety Standards
- OSHA regulations
- Personal protective equipment (PPE)
- Electrical hazards and prevention
- Lockout/tagout procedures
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Electrical Tools and Equipment
- Use of multimeters, voltmeters, and ammeters
- Testing and troubleshooting equipment
- Basic maintenance procedures
Practical Wiring Skills
- Residential and commercial wiring
- Motor connections
- Lighting circuits
- Panel installation and repair
Tips to Prepare for the TDLR Journeyman Electrician Test
- Study the NEC: Focus on commonly used articles and tables.
- Practice calculations: Voltage drop, conduit fill, and load calculations are frequently tested.
- Use practice tests: Taking multiple practice exams increases confidence and highlights weak areas.
- Understand wiring diagrams: Reading and interpreting diagrams is crucial.
- Follow safety standards: Many questions involve safe practices and OSHA rules.
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Sample TDLR Journeyman Electrician Test
Below is a sample test designed to mirror the actual exam. The questions cover theory, code, safety, and practical scenarios.
| # | Question | Options |
|---|---|---|
| 1 | What is the primary purpose of a circuit breaker? | A. Increase voltage B. Protect circuits from overload C. Store electricity D. Measure current |
| 2 | Ohm’s Law is expressed as: | A. V = I × R B. P = V/I C. I = P × R D. R = V + I |
| 3 | Which conductor is typically used for grounding? | A. Black B. Green C. White D. Red |
| 4 | In NEC, what is the maximum number of conductors in a 1-inch conduit? | A. 6 B. 7 C. 8 D. 9 |
| 5 | What PPE is required when working on live circuits? | A. Gloves and goggles B. Rubber mat C. Hard hat D. Steel-toed boots |
| 6 | What is the main advantage of using a GFCI? | A. Increase current B. Prevent shock C. Reduce power loss D. Control voltage |
| 7 | How is electrical power calculated? | A. P = V × I B. P = I / V C. P = V – I D. P = V + I |
| 8 | Which color wire is usually neutral in residential wiring? | A. Black B. Red C. White D. Green |
| 9 | Which NEC article covers general wiring methods? | A. 210 B. 310 C. 100 D. 250 |
| 10 | Series circuits have: | A. Same current, different voltage B. Same voltage, different current C. Different current and voltage D. None |
| 11 | Voltage drop should not exceed: | A. 1% B. 3% C. 5% D. 10% |
| 12 | How often should insulation resistance be tested? | A. Monthly B. Annually C. Every 5 years D. Only when damaged |
| 13 | Motor full-load current is used for: | A. Conduit sizing B. Breaker selection C. Load calculation D. All |
| 14 | NEC requires AFCI protection in: | A. Kitchens B. Bedrooms C. Bathrooms D. Garages |
| 15 | A multimeter can measure: | A. Voltage B. Current C. Resistance D. All of the above |
| 16 | The main purpose of bonding is: | A. Reduce resistance B. Ensure safety C. Increase voltage D. None |
| 17 | A transformer primary voltage is 480V and secondary is 120V. What type is this? | A. Step-up B. Step-down C. Isolation D. Auto |
| 18 | Which tool is used to strip wires safely? | A. Pliers B. Wire stripper C. Screwdriver D. Hammer |
| 19 | Ground rods must be: | A. 2 ft B. 4 ft C. 8 ft D. 10 ft |
| 20 | Which type of conduit is best for wet locations? | A. EMT B. PVC C. IMC D. RMC |
| 21 | NEC requires outlets to be no more than: | A. 10 ft apart B. 12 ft apart C. 15 ft apart D. 20 ft apart |
| 22 | A single-phase load has 240V and 10A. What is the power? | A. 2400 W B. 1200 W C. 4800 W D. 600 W |
| 23 | Which breaker trips faster? | A. Thermal-magnetic B. Magnetic only C. Thermal only D. Solid-state |
| 24 | Conductor ampacity is affected by: | A. Temperature B. Number of conductors C. Conduit type D. All |
| 25 | What does NEC Article 250 cover? | A. Grounding and bonding B. Circuits C. Conduits D. Motors |
| 26 | What is the first step in lockout/tagout? | A. Notify supervisor B. Shut down equipment C. Verify zero energy D. Apply lock |
| 27 | Which instrument is used to check continuity? | A. Multimeter B. Voltmeter C. Ammeter D. Clamp meter |
| 28 | NEC requires at least ___ inches of clearance in front of panels. | A. 24 B. 30 C. 36 D. 42 |
| 29 | What is the maximum distance for bathroom GFCI outlets? | A. 2 ft B. 3 ft C. 6 ft D. 10 ft |
| 30 | Which type of wiring is common in residential attics? | A. NM cable B. EMT C. RMC D. BX |
| 31 | Series-parallel circuits are used to: | A. Reduce voltage B. Increase resistance C. Combine current paths D. None |
| 32 | Which breaker is suitable for motor loads? | A. Standard B. HACR C. GFCI D. AFCI |
| 33 | A conductor’s ampacity is measured in: | A. Volts B. Ohms C. Amps D. Watts |
| 34 | What is NEC Article 310 about? | A. Conductors B. Grounding C. Motors D. Wiring |
| 35 | How many feet of copper wire equals 1 ohm resistance per 1000 feet at 75°C? | A. 1 B. 10 C. 1000 D. Depends on size |
| 36 | Which type of lighting requires grounding? | A. Incandescent B. Fluorescent C. LED D. All |
| 37 | Which device protects against short circuits? | A. Fuse B. Resistor C. Capacitor D. Transformer |
| 38 | NEC requires metal boxes to be: | A. Grounded B. Painted C. Sealed D. Insulated |
| 39 | What is the function of a relay? | A. Open or close a circuit B. Store energy C. Reduce voltage D. Measure current |
| 40 | Voltage in a 3-phase system is measured as: | A. Phase-to-neutral B. Phase-to-phase C. Both D. None |
| 41 | Which is safest to use in damp locations? | A. NM cable B. MC cable C. UF cable D. BX cable |
| 42 | Which type of current flows in motors? | A. AC B. DC C. Both D. None |
| 43 | How do you size a conduit for multiple conductors? | A. Using NEC tables B. Guessing C. Double the wire size D. Multiply by 1.5 |
| 44 | What is the purpose of a time-delay fuse? | A. Protect sensitive loads B. Speed up trips C. Increase voltage D. Reduce current |
| 45 | NEC requires receptacles in kitchens to be: | A. GFCI protected B. AFCI protected C. Both D. None |
| 46 | What is the common color for hot wires in single-phase 120V circuits? | A. White B. Black C. Green D. Blue |
| 47 | What type of conductor is used for high-temperature applications? | A. THHN B. THWN C. XHHW D. All |
| 48 | Which grounding conductor connects to water pipe? | A. Equipment ground B. Main ground C. Bonding wire D. Conduit |
| 49 | NEC requires spare spaces in panels to be: | A. Covered B. Open C. Half-filled D. Marked |
| 50 | The main service disconnect must be rated for: | A. 50% of load B. 100% of load C. 150% of load D. Depends |
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Answer Key for Practice Test
| # | Answer |
|---|---|
| 1 | B |
| 2 | A |
| 3 | B |
| 4 | C |
| 5 | A |
| 6 | B |
| 7 | A |
| 8 | C |
| 9 | B |
| 10 | A |
| 11 | B |
| 12 | B |
| 13 | D |
| 14 | B |
| 15 | D |
| 16 | B |
| 17 | B |
| 18 | B |
| 19 | D |
| 20 | B |
| 21 | B |
| 22 | A |
| 23 | A |
| 24 | D |
| 25 | A |
| 26 | B |
| 27 | A |
| 28 | C |
| 29 | C |
| 30 | A |
| 31 | C |
| 32 | B |
| 33 | C |
| 34 | A |
| 35 | D |
| 36 | D |
| 37 | A |
| 38 | A |
| 39 | A |
| 40 | C |
| 41 | C |
| 42 | A |
| 43 | A |
| 44 | A |
| 45 | A |
| 46 | B |
| 47 | D |
| 48 | B |
| 49 | A |
| 50 | B |
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Final Tips
Success on the TDLR Journeyman Electrician Test comes from consistent practice, studying NEC requirements, and reviewing real-world wiring scenarios. Use this practice test to identify weak areas, review the NEC, and focus on practical applications. Remember, safety and code compliance are as important as technical knowledge. Passing the test opens doors to a licensed career with opportunities in residential, commercial, and industrial electrical work.
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By following this guide, using the practice questions, and mastering the theory and practical skills, you can confidently approach the TDLR Journeyman Electrician Test and achieve success.
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