Residential HVAC Installation Practice Exam

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Prepare for your Residential HVAC Installation test with our engaging quizzes and in-depth multiple-choice questions. Each question comes with hints and detailed explanations to ensure mastery of the subject matter. Get ready for your exam and boost your confidence!

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What would be the impact on cfm if the ACH (Air Changes per Hour) value is increased in an HVAC system?

Decrease in air volume
Increase in air volume
No impact on air volume
Improved air quality

The correct answer is: Increase in air volume

Increasing the ACH (Air Changes per Hour) value in an HVAC system would lead to an increase in air volume. This is because a higher ACH value means that the air in the space is being replaced more frequently, resulting in a greater volume of air being moved through the system. This increase in air volume helps improve ventilation and air quality by reducing the concentration of contaminants in the indoor air. Therefore, the correct answer is B. The other options are not correct because increasing the ACH value would not result in a decrease in air volume (option A), have no impact on air volume (option C), or directly lead to improved air quality (option D).