Cautions alert students to practices that could potentially damage equipment, instruments, or vehicles. Summary feature highlights the most important concepts presented in each chapter, providing an additional review tool for the student. Technical Terms list the key terms to be learned in the chapter. Students should review this list after completing the chapter to be sure they know the definition of each term. Review Questions, found at the end of each chapter, allow the student to demonstrate knowledge, identification, and comprehension of chapter material. Critical Thinking Questions expand on chapter material and challenge the student to answer analytical questions, complete a project, or a combination of both.