Exam Mode
ACS CCN1 Core Domestic Gas Safety Assessment
The ACS CCN1 is the UK's core domestic gas safety certification required for Gas Safe Register membership. It covers gas legislation, combustion, ventilation, pipework, flue systems, unsafe situations procedures, and meter controls through written multiple-choice assessments.
45
Questions
90 min
Time Limit
80%
To Pass
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Exam Rules
- You can skip questions and return to them later
- Flag questions for review before submitting
- No feedback shown until you submit the entire exam
- Unanswered questions count as wrong — answer everything
- 10 pretest questions are mixed in and don't affect your score
- Timer auto-submits when time runs out
- Your progress is auto-saved every 30 seconds