TheStudyDrill · Trade license exam prep
Pass your trade exam the first time.
Free practice tests with instant explanations. Every question in the full bank is verified against official sources — and re-verified every year when standards change.
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HVAC / Refrigeration
EPA Section 608 (Universal)
Pass: 18/25 (72%) per section, scored independently
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NATE
Coming soon
CDL
Coming soon
ASE A1–A8
Coming soon
NHIE
Coming soon
Why it works (and why AI chatbots don't)
- 1.Every question cites its official source — regulation, manual, or code section. No hallucinated answers.
- 2.A licensed tradesperson reviews every question before it ships.
- 3.Test banks are re-verified every year against the current standards edition — including the all-new 2026 EPA 608 bank.