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23 exams · 2,809+ source-verified questions
HVAC, electrical, plumbing, welding, construction, automotive, home inspection, OSHA safety — hands-on professions that build and maintain America.
EPA Section 608 certification for HVAC technicians
EPA 608 Core
281 questions · 120 min · 70% pass
EPA 608 Type I
179 questions · 60 min · 70% pass
ASE certification for automotive technicians
ASE G1 Maintenance & Light Repair
230 questions · 90 min · 70% pass
Journeyman Electrician certification — NEC-based exams for all 50 states
Journeyman Electrician — National (NEC)
314 questions · 240 min · 70% pass
California Journeyman Electrician
205 questions · 240 min · 70% pass
Texas Journeyman Electrician
205 questions · 240 min · 70% pass
New York Journeyman Electrician
205 questions · 240 min · 70% pass
Florida Journeyman Electrician
205 questions · 240 min · 70% pass
Ohio Journeyman Electrician
205 questions · 240 min · 70% pass
Journeyman Plumber certification — IPC/UPC-based exams for all 50 states
Journeyman Plumber — National (IPC)
291 questions · 240 min · 70% pass
California Journeyman Plumber (UPC)
283 questions · 240 min · 70% pass
Texas Journeyman Plumber (IPC)
283 questions · 240 min · 70% pass
New York Journeyman Plumber
283 questions · 240 min · 70% pass
Florida Journeyman Plumber
283 questions · 240 min · 70% pass
AWS Certified Welder — D1.1 structural, ASME Section IX, API 1104
AWS Certified Welder — National
164 questions · 120 min · 70% pass
California Structural Welding
164 questions · 120 min · 70% pass
New York City Welding License
164 questions · 120 min · 70% pass
NHIE — National Home Inspector Examination required for licensing in 35+ states
NHIE Home Inspector
200 questions · 240 min · 70% pass
EPA Section 608 Type II (High-Pressure) — certification for technicians servicing or disposing of high-pressure appliances (residential AC, heat pumps, commercial refrigeration).
EPA 608 Type II (High-Pressure)
100 questions · 60 min · 70% pass
EPA Section 608 Type III (Low-Pressure) — certification for technicians servicing or disposing of low-pressure appliances (centrifugal chillers, industrial systems).
EPA 608 Type III (Low-Pressure)
100 questions · 60 min · 70% pass
Forklift Certification (OSHA 1910.178) — required for all powered industrial truck operators. Covers safety, load handling, stability, inspection, and workplace-specific hazards.
Forklift Certification (OSHA)
100 questions · 60 min · 70% pass
OSHA 10-Hour Construction Safety — DOL card required for construction workers nationwide
OSHA 10 Construction
80 questions · 60 min · 70% pass
OSHA 30-Hour Construction Safety — supervisor-level DOL card required for foremen and site supers
OSHA 30 Construction
120 questions · 120 min · 70% pass
A Day in the Life of an HVAC Technician — What the Job Is Really Like
What does an HVAC technician actually do all day? Real insight from the field: morning dispatch, service calls, attic crawls in summer, rooftop units in winter, the tools you carry, the problems you solve, and why no two days are ever the same. If you're considering HVAC as a career, read this before you commit — the job is harder and more rewarding than you think.
8 min read read
A Day in the Life of an Electrician — What the Job Is Really Like
What does an electrician actually do all day? Real insight: pulling wire through conduit, troubleshooting dead circuits, bending pipe, reading blueprints, and working live on 480V panels. The job is dangerous, technical, and pays $60-115K. If you're considering becoming an electrician, read this first.
7 min read read
A Day in the Life of a Plumber — What the Job Is Really Like
What does a plumber actually do all day? Real insight: snaking drain lines, soldering copper pipe, diagnosing gas leaks, installing water heaters, and crawling under houses at 7 AM. The job is dirty, technical, recession-proof, and pays $55-100K. If you're considering becoming a plumber, read this first.
8 min read read
A Day in the Life of a Welder — Sparks, Steel, and Six Figures
What does a welder actually do all day? Real insight: MIG welding structural steel in a fabrication shop, TIG welding stainless pipe in a refinery shutdown, burning 7018 rods on a pipeline at -30°F, and testing welds with x-ray inspection. The job is hot, dangerous, and pays $45-130K+. If you're considering welding as a career, read this first.
8 min read read
A Day in the Life of a Home Inspector — Crawlspaces, Roofs, and $70K+
What does a home inspector actually do all day? Real insight: inspecting two houses per day, crawling through 120°F attics, testing every outlet in a 1950s ranch, finding $20,000 foundation cracks, and writing 50-page inspection reports. The job is physically demanding, legally high-stakes, recession-proof, and pays $55-90K. If you're considering becoming a home inspector, read this first.
7 min read read
EPA 608 Certification Guide 2026 — How to Pass Core, Type I, II & III
160 verified EPA Section 608 practice questions mapped to the actual exam pool. Covers Core, Type I, Type II, Type III, and Universal. Every answer traced to the official EPA manual or 40 CFR Part 82. Used by 5,000+ HVAC technicians.
12 min read read
Flashcards
23 exams with spaced-repetition study cards
EPA 608 Refrigerant Quick Reference
CFC, HCFC, HFC, HFO classifications. ODP/GWP values. Recovery vacuum levels. Cylinder color codes. Safety classifications. Montreal Protocol phaseout dates.
NEC Electrician Formula Sheet
Ohm's Law, power calculations, voltage drop formulas. Conductor sizing (NEC 310.16). Box fill (314.16). Conduit fill (Chapter 9). Service load calculations. Motor FLC tables.
Welding Symbols & Electrode Guide
AWS welding symbols. SMAW electrode classification. GMAW/GTAW parameters. Joint design basics. Common weld defects.
Study Guides & Knowledge Maps
Detailed topic breakdowns for Skilled Trades exams
Many skilled trades licenses have state-specific requirements. Browse state-level exam info: