Air Systems Cleaning Specialist (ASCS) Practice Exam

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Prepare for the Air Systems Cleaning Specialist Exam. Study with flashcards and multiple choice questions, each question is accompanied by hints and explanations. Gear up for your certification!

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Which of the following factors creates the greatest restriction of airflow in an HVAC system?

  1. A dirty fan motor

  2. A dirty Plenum

  3. A dirty Coil

  4. A dirty return duct

The correct answer is: A dirty Coil

A dirty coil creates the greatest restriction of airflow in an HVAC system because coils are essential components involved in heat exchange. When the coil accumulates dirt and debris, it impairs its ability to efficiently transfer heat. This buildup restricts airflow, leading to reduced system efficiency, increased energy consumption, and potential overheating, which can damage the system. The direct impact on airflow is more significant with the coils than with the other components listed, as they are integral to the cooling and heating process. Efficient airflow is critical for maintaining proper system performance, and dirty coils pose the most immediate threat to achieving optimal airflow in the overall system.

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