Automotive Service Excellence (ASE) Air Conditioner Certification Practice Exam 2025 - Free ASE Air Conditioner Practice Questions and Study Guide

Question: 1 / 400

Identify the two main types of A/C systems found in vehicles.

Window and central air systems

Direct expansion (DX) system and cycle system

The two main types of A/C systems found in vehicles are the direct expansion (DX) system and the cycle system. The direct expansion system utilizes refrigerant that evaporates in the evaporator, effectively absorbing heat from inside the vehicle and providing cool air. This system is commonly found in most automotive applications due to its efficiency and effectiveness in cooling.

The cycle system refers to the refrigeration cycle utilized in A/C systems, which includes the phases of compression, condensation, expansion, and evaporation. This cycle is fundamental to how automotive A/C systems function, allowing them to maintain a comfortable cabin environment by continuously circulating refrigerant and managing heat exchange. Recognition of these systems is essential for understanding vehicle air conditioning and diagnosing issues, making ‘B’ the correct choice for identifying the primary types of A/C systems in vehicles.

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Hybrid and electric systems

Forced air and gravity-based systems

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