Air Systems Cleaning Specialist (ASCS) Practice Exam

A package unit contains which of the following components?

1. Compressor, evaporator coil, condenser, supply fan, and filter

2. Evaporator coil, VAV box, condenser, supply fan, exhaust fan, and filter

3. Compressor, evaporator coil, condenser, supply fan, exhaust fan, and filter

4. Compressor, evaporator coil, condenser, supply fan, thermostat, and filter

The correct answer is: Evaporator coil, VAV box, condenser, supply fan, exhaust fan, and filter

The correct choice highlights the essential components of a packaged unit, which is a self-contained system designed for both heating and cooling purposes. A packaged unit typically integrates several functions in one complete unit, making it suitable for various applications, especially in commercial settings. A packaged unit does indeed include the evaporator coil, which is crucial for absorbing heat from the indoor air; the condenser, which releases that heat to the outdoor environment; and the supply fan, responsible for distributing the conditioned air throughout the space. Additionally, the inclusion of a Variable Air Volume (VAV) box is noteworthy as it helps regulate the amount of conditioned air delivered based on the specific requirements of different areas. The exhaust fan is also integral, as it assists in removing stale air from the indoor environment, thereby enhancing indoor air quality. Finally, the filter plays a crucial role in trapping dust, allergens, and other particulate matter, ensuring cleaner air is circulated. While other options may include some correct components, they lack the comprehensive integration provided by the combination found in the correct answer, highlighting the importance of recognizing the unique elements that make up a packaged unit.