Sample Automotive Engine Rebuilders Association Certification Practice Questions

Try these questions from our free Automotive Engine Rebuilders Association Certification practice tests. The correct answer and an explanation follow each question.

1. When performing a wet compression test and results improve significantly compared to a dry test, this indicates:

   • A. A leaking head gasket
   • B. Worn or damaged piston rings
   • C. A stuck-open exhaust valve
   • D. Excessive valve stem clearance

   Answer: B. Worn or damaged piston rings

   Oil added to the cylinder temporarily seals worn rings; a big improvement from dry to wet test confirms ring and/or bore wear as the source of low compression.

2. How does the AERA body of knowledge relate to daily professional practice?

   • A. It is theoretical with limited application
   • B. It provides the foundational framework guiding decision-making and standard practices
   • C. It only applies during exams
   • D. It is only for academic research

   Answer: B. It provides the foundational framework guiding decision-making and standard practices

   The body of knowledge provides the framework guiding daily decision-making and practices.

3. A wet compression test shows a significant increase in compression pressure over the dry test in one cylinder. What does this indicate?

   • A. A leaking intake valve
   • B. Worn or broken piston rings
   • C. A blown head gasket
   • D. A leaking exhaust valve

   Answer: B. Worn or broken piston rings

   When oil added during a wet test temporarily seals the rings and significantly raises compression, worn or broken piston rings are the source of the low compression.

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