ASE F1 Compressed Natural Gas (CNG) Vehicles Test
The ASE F1 certification test assesses technician competency in compressed natural gas vehicle systems, covering inspection, equipment installation, leak testing, emissions, system diagnosis, maintenance and repair, and cylinder safety. Passing earns ASE certification for light-vehicle CNG specialists.
65
Questions
75 min
Time Limit
70%
To Pass
Checking for saved progress...
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