# TradeCert Prep > Independent skilled-trade exam practice and study resource with 15 free sample questions per exam, paid question banks, timed practice modes, flash cards, missed-question review, weakest-domain drills, and practice completion certificates. Canonical domain: https://tradecertprep.com/ Last updated: 2026-06-05 Support: support@tradecertprep.com TradeCert Prep is independent. It is not an official certification provider, testing vendor, union, licensing board, government agency, or official exam owner. Practice questions are original educational examples. Completion certificates document TradeCert Prep practice activity only and do not issue licenses, official certifications, cards, or official exam results. For citation, use the canonical page URL for the exact exam, resource, glossary term, tool, trade-news brief, or citation page being referenced. A fuller AI-readable brief is available at https://tradecertprep.com/llms-full.txt. ## Core Pages - [Homepage](https://tradecertprep.com/): Main exam-prep landing page and exam index. - [AI Citation Facts](https://tradecertprep.com/ai-citation-facts/): Concise public source of truth for AI search and citations. - [Resources](https://tradecertprep.com/resources/): Study guides, samples, comparisons, glossary, tools, and career outlook pages. - [Trade News](https://tradecertprep.com/trade-news/): Trade-specific regulatory and safety briefs connected to exam-prep habits. - [Glossary](https://tradecertprep.com/glossary/): Definitions for skilled-trade exam terms. - [Tools](https://tradecertprep.com/tools/): Free study, pacing, career, score, wage, and trade-math tools. ## Exam Practice Pages - [EPA 608 Practice Test](https://tradecertprep.com/epa-608-practice-test/): Practice core, Type I, Type II, Type III, and universal-style refrigerant questions with fast explanations. Includes 15 free sample questions and paid-bank access after checkout/login. - [CDL Practice Test](https://tradecertprep.com/cdl-practice-test/): Practice CDL general knowledge, air brakes, combination vehicles, hazmat, tanker, passenger, and pre-trip topics. Includes 15 free sample questions and paid-bank access after checkout/login. - [IBEW Aptitude Test Prep](https://tradecertprep.com/ibew-aptitude-test/): Build speed on algebra, functions, mechanical reasoning, and reading questions before your apprenticeship test. Includes 15 free sample questions and paid-bank access after checkout/login. - [NASCLA Practice Exam](https://tradecertprep.com/nascla-practice-exam/): Practice contractor exam topics like project management, estimating, safety, and business law. Includes 15 free sample questions and paid-bank access after checkout/login. - [Journeyman Electrician Practice Test](https://tradecertprep.com/journeyman-electrician-practice-test/): Practice code-navigation, calculations, safety, wiring methods, and exam-style electrical questions. Includes 15 free sample questions and paid-bank access after checkout/login. - [CWI Practice Test](https://tradecertprep.com/cwi-practice-test/): Practice welding symbols, inspection concepts, discontinuities, and procedure-related questions. Includes 15 free sample questions and paid-bank access after checkout/login. - [Plumbing License Practice Test](https://tradecertprep.com/plumbing-license-practice-test/): Practice plumbing code concepts, drainage, venting, fixtures, safety, and license-style questions. Includes 15 free sample questions and paid-bank access after checkout/login. - [NCCCO Practice Test](https://tradecertprep.com/nccco-practice-test/): Practice crane safety, load charts, rigging concepts, signals, and scenario-based operator questions. Includes 15 free sample questions and paid-bank access after checkout/login. - [NHIE Practice Test](https://tradecertprep.com/nhie-practice-test/): Practice home inspection systems, report writing, safety observations, and exam-style scenarios. Includes 15 free sample questions and paid-bank access after checkout/login. ## Study Guides - [EPA 608 Study Guide](https://tradecertprep.com/resources/epa-608-study-guide/): Independent EPA 608 study guide with Core, Type I, Type II, Type III, and Universal practice focus areas. - [IBEW Aptitude Test Study Guide](https://tradecertprep.com/resources/ibew-aptitude-test-study-guide/): Independent IBEW aptitude study guide for algebra, functions, reading comprehension, and timed practice. - [NASCLA Study Guide](https://tradecertprep.com/resources/nascla-study-guide/): Independent NASCLA study guide for contractor exam topics, business law, estimating, project control, and timed review. - [Journeyman Electrician Study Guide](https://tradecertprep.com/resources/journeyman-electrician-study-guide/): Independent journeyman electrician study guide for code navigation, calculations, wiring methods, and safety review. - [CWI Study Guide](https://tradecertprep.com/resources/cwi-study-guide/): Independent CWI study guide for welding symbols, inspection fundamentals, discontinuities, NDE, and code application. - [Plumbing License Study Guide](https://tradecertprep.com/resources/plumbing-license-study-guide/): Independent plumbing license study guide for drainage, venting, traps, water supply, fixture units, and code review. - [NCCCO Study Guide](https://tradecertprep.com/resources/nccco-study-guide/): Independent NCCCO study guide for mobile crane core concepts, load charts, rigging, site setup, and safety practice. - [NHIE Study Guide](https://tradecertprep.com/resources/nhie-study-guide/): Independent NHIE study guide for home inspection systems, report writing, safety defects, and timed exam review. ## Sample Questions - [EPA 608 Sample Questions](https://tradecertprep.com/resources/epa-608-sample-questions/): Public sample questions with answer explanations. - [IBEW Aptitude Sample Questions](https://tradecertprep.com/resources/ibew-aptitude-sample-questions/): Public sample questions with answer explanations. - [NASCLA Sample Questions](https://tradecertprep.com/resources/nascla-sample-questions/): Public sample questions with answer explanations. - [Journeyman Electrician Sample Questions](https://tradecertprep.com/resources/journeyman-electrician-sample-questions/): Public sample questions with answer explanations. - [CWI Sample Questions](https://tradecertprep.com/resources/cwi-sample-questions/): Public sample questions with answer explanations. - [Plumbing License Sample Questions](https://tradecertprep.com/resources/plumbing-license-sample-questions/): Public sample questions with answer explanations. - [NCCCO Sample Questions](https://tradecertprep.com/resources/nccco-sample-questions/): Public sample questions with answer explanations. - [NHIE Sample Questions](https://tradecertprep.com/resources/nhie-sample-questions/): Public sample questions with answer explanations. ## Tools - [Trade Career Comparison Tool](https://tradecertprep.com/tools/trade-career-comparison-tool/): Compare trade paths by pay, education or training, job outlook, openings, exam prep, and field reality. - [Ohm's Law Calculator](https://tradecertprep.com/tools/ohms-law-calculator/): Free Ohm's law calculator for voltage, current, resistance, and power practice. - [Pipe Slope Calculator](https://tradecertprep.com/tools/pipe-slope-calculator/): Free pipe slope calculator for plumbing drainage practice and fixture layout review. - [Practice Test Score Calculator](https://tradecertprep.com/tools/practice-test-score-calculator/): Free practice test score calculator for percent score, target score, and next study step. - [Exam Time Pacing Calculator](https://tradecertprep.com/tools/exam-time-pacing-calculator/): Calculate minutes per question, checkpoint targets, and whether you are ahead or behind during a timed exam set. - [Apprenticeship Wage Progression Calculator](https://tradecertprep.com/tools/apprenticeship-wage-progression-calculator/): Estimate apprentice pay steps from a journey wage, percentage progression, expected hours, and overtime assumptions. - [License Path Checklist Builder](https://tradecertprep.com/tools/license-path-checklist-builder/): Build a practical checklist for education, supervised hours, application documents, exam prep, insurance, and renewal research. - [Study Hours Planner](https://tradecertprep.com/tools/study-hours-planner/): Plan weekly study hours from your test date, current score, target score, and available study days. ## Optional - [Sitemap](https://tradecertprep.com/sitemap.xml): Full canonical crawl map. - [Privacy](https://tradecertprep.com/privacy/): Privacy policy. - [Terms](https://tradecertprep.com/terms/): Terms and independent-resource limitations. - [Refund Policy](https://tradecertprep.com/refund-policy/): Refund and access-support terms.