With more natural gas vehicles on the roads than ever before, today's technicians need to be prepared to service these vehicles, both in the shop and in a testing environment for ASE certification. To accomplish this, ASE Test Preparation - H1, Compressed Natural Gas has gathered the latest need-to-know information about the new compressed natural gas task list, and paired it with ASE-style practice tests. The book begins with a history of the ASE and progresses to include guidelines, techniques, and strategies for taking and passing the certification exams. An overview of the task lists follows and is reinforced with both ASE-style practice questions and answer rationales that allow readers to practice their test-taking skills and identify areas in need of improvement.