Residential HVAC Installation Practice Exam

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Prepare for your Residential HVAC Installation Exam with engaging quizzes and multiple-choice questions. Each question includes hints and insightful explanations to ensure you're ready for the test!

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How does adjusting the ACH value affect the cfm calculation in an HVAC system?

  1. Increases the energy efficiency of the system

  2. Decreases the cfm value

  3. Increases the cfm value

  4. No impact on the cfm calculation

The correct answer is: Increases the cfm value

Adjusting the ACH (air changes per hour) value directly affects the cfm (cubic feet per minute) calculation in an HVAC system. Increasing the ACH value will result in increased airflow, which in turn increases the cfm value. This means that more air will be circulated through the system within a minute, affecting the overall performance and efficiency of the HVAC system. Therefore, the correct answer is that adjusting the ACH value increases the cfm value. The other options are incorrect as they do not accurately reflect the relationship between ACH and cfm in an HVAC system.

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