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Free questions by topic
Ten study sections, 20 questions each. Every item shows the keyed answer, the article to open, and a short explanation. Together with the 20-question practice test, about 220 questions are free. The rest of the bank stays in the practice app.
- 20 questionsServicesArticle 230Service conductors, the service disconnect, and where you shut the building off.
- 20 questionsDefinitionsArticle 100The words the rest of the code uses: grounded, grounding, accessible, continuous.
- 20 questionsBranch circuitsArticle 210Required outlets, GFCI, AFCI, and the circuits a dwelling kitchen needs.
- 20 questionsGrounding and bondingArticle 250Electrodes, the main bonding jumper, and the equipment grounding path.
- 20 questionsMotorsArticle 430Motor disconnects, overload versus fault protection, and conductor ampacity.
- 20 questionsConductors and overcurrentArticles 215, 240, and 408Feeder ampacity, fuses and breakers, and panelboard overcurrent.
- 20 questionsBoxes and wiring methodsArticles 314, 334, and 358Box fill, nonmetallic-sheathed cable, and EMT.
- 20 questionsSpecial occupancies and equipmentArticles 500 and 680Classified locations and swimming pools.
- 20 questionsLoad calculationsArticle 120Dwelling VA totals and demand under NEC 2026 Article 120, using the figures printed in the problem.
- 20 questionsPower and voltage dropBasic power mathCurrent, three-phase power, voltage drop, and transformer full-load current.
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