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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Up to what diameter does flexible round duct typically come in?

12 inches
18 inches
24 inches
30 inches

The correct answer is: 24 inches

Flexible round duct typically comes in diameters up to 24 inches. This is the standard maximum size for flexible round ducts used in residential HVAC installations. Sizes larger than 24 inches are usually made from rigid duct materials due to the need for structural integrity at larger sizes. Options A, B, and D are incorrect as they exceed the typical maximum diameter for flexible round ducts in residential HVAC installations.