Residential HVAC Installation Practice Exam

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Prepare for the Residential HVAC Installation Exam with this comprehensive quiz. Test your knowledge with multiple-choice questions and get ready to excel in your HVAC installation career.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which component in the cfm calculation formula represents the air changes per hour?

ACH
Volume of the house
Rate of air leakage
Time duration in minutes

The correct answer is: ACH

The component in the cfm calculation formula that represents the air changes per hour is ACH, or air changes per hour. This is because ACH specifically measures the number of times the entire volume of air within a space is replaced in one hour. Option B, volume of the house, is incorrect because while it is an important aspect in the cfm calculation formula, it does not solely represent the air changes per hour. Options C and D, rate of air leakage and time duration in minutes, are also incorrect as they do not account for the entire volume of air within the space and do not specifically measure the number of times it is replaced in one hour.