Illinois Home Inspector Practice Exam

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Prepare for the Illinois Home Inspector Test with quizzes featuring flashcards and multiple choice questions, complete with hints and explanations. Ace your certification!

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What is the diameter of high velocity ducts?

1 inch
2 inches
3 inches
4 inches

The correct answer is: 2 inches

High velocity ducts are specifically designed to move air at increased speeds compared to standard ducts, which allows them to deliver conditioned air effectively throughout a space. The correct diameter for these ducts is typically around 2 inches. This size helps maintain the high air velocity needed for efficient delivery while still fitting into the confines of residential and commercial spaces where installation may be limited. Choosing a diameter that is either too small or too large would counteract the advantages of high velocity systems. Ducts that are too small may lead to increased pressure drops and noise, while larger diameters could lead to inefficiencies and insufficient air mixing. This balance is essential in accomplishing the desired heating or cooling outcome effectively and maintaining comfort in the environment served by these ducts.