Use our free ase practice tests to pass you exam and get your ase certification study with actual ase questions and answers updated for 2021 the national institute for automotive service excellence ase is a non profit professional certification group that provides professional certification to those in the automobile repair and service industry throughout the united states as well as . Ase x1 exhaust systems general questions question 1 of 1 we have several ase practice tests back at the ase practice test main page please check back in the future as we are constantly adding new questions for now go to the ase category page or click submit to see other free ase practice tests that contain hundreds of questions faq. Included with our ase x1 study guide for the exhaust systems certification is our free ase x1 practice test ase x1 study guide is published 03 2012. The x1 ase certification test has a section 8 questions focused on emissions system diagnosis for that section ase defines the tasks as o identify failed catalytic converters determine the cause of failure o identify failed oxygen sensors o2s ho2s components and circuitry determine the cause of failure. Free ase practice tests illustrated ase study guides ase test prep videos 20 question quizzes over 1000 questions and explanations at the end of each practice test a scored quiz reinforces the material covered in the guide its true and unfortunate that many people fail these exams most of the time its because they werent prepared