NATE Practice Test
Free NATE-style HVAC questions across safety, electrical, the refrigeration cycle, airflow and heating — every answer explained, then straight into free interactive diagnostic labs.
- Interactive decision labs
- Built by working technicians
- Path-based verifiable certificate
- Exam preparation only
- Worldwide online
NATE-style practice questions
Core knowledge-area questions in the style of entry-level and service certification exams: safety, tools, electrical, airflow and the refrigeration cycle. Study material only — NATE administers its own exams.
Before working inside a live air handler panel, the first step is to:
Turn the theory into service calls
Questions test recall. These graded decision labs test whether you can work the call: one decision at a time, readings that fill in as you check, coaching when you take a wrong turn. Free, no login.
Residential no-cool call
Work a no-cool from the call through the electrical chain to a verified repair.
Residential no-heat call
Follow the heating sequence of operation and prove each step before condemning parts.
Frozen coil and airflow
Static pressure, filter condition and the difference between airflow and charge faults.
Rooftop unit not cooling
Commercial no-cool: safety chain, contactor and a high-pressure trip with a real cause.
Questions technicians ask
- Is this an official NATE exam?
- No. These are NATE-style study questions written by working technicians. NATE administers its own exams and is the only body that can issue NATE certification.
- Which knowledge areas do the questions cover?
- Safety, tools and measurement, electrical, the refrigeration cycle, airflow and basic heating — the core areas that appear across entry-level and service certification exams.
- Do I need to sign up?
- No. The practice questions and the diagnostic labs are free and open, with no account required.
- How should I use this alongside hands-on work?
- Use the questions to find the area you are weakest in, then work the matching graded decision lab so the knowledge is tied to a real service call rather than a definition.