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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Practice this question and more.

In a constant air volume (CAV) system, changes in temperature are made by what method?

Dampering at terminal end
Modulating the volume of air
Heating or cooling the air
Dampering at the fan

The correct answer is: Heating or cooling the air

In a constant air volume (CAV) system, changes in temperature are achieved primarily by heating or cooling the air. This is because in a CAV system, the volume of air delivered to the space remains constant regardless of the temperature adjustments needed. To maintain the desired indoor temperature, the air can be heated or cooled at the source before it is distributed throughout the system. This approach contrasts with systems where the volume of air can vary in response to temperature changes; in those systems, modulating the volume of air is a more common method to maintain comfort levels. Similarly, adjustments made through dampers usually involve controlling airflow rather than directly altering the temperature of the air itself. Therefore, heating or cooling the air is the fundamental mechanism by which a CAV system effectively manages indoor climate conditions.