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!

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At what temperature difference between inside and outside of a duct is insulation typically required?

5°F
10°F
15°F
20°F

The correct answer is: 15°F

Insulation is typically required when there is a significant temperature difference between the inside and outside of a duct to prevent heat loss or gain and maintain the desired temperature of the air flowing through the duct. A temperature difference of 15°F is significant enough to warrant the need for insulation to ensure energy efficiency and consistent indoor comfort. Options A, B, and D have temperature differences that are not as substantial and may not require insulation as a result.