Review Questions allow you to demonstrate knowledge, identifi cation, and comprehension of chapter material. ASE-Type Questions reinforce your learning and familiarize you with the format and types of questions found on ASE certifi cation exams. Summary feature provides an additional review tool for you and reinforces key learning objectives. Notes provide supplemental technical and service hints related to the procedure or system being explained. Cautions alert you to practices that could potentially damage equipment or instruments. Warnings alert you to potentially dangerous materials and practices.