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.

Why is a reducing plenum system typically used?

To connect duct sections
To observe the lesson
To maintain a constant pressure along the trunk duct
To evaluate the lesson

The correct answer is: To maintain a constant pressure along the trunk duct

A reducing plenum system is typically used to maintain a constant pressure along the trunk duct. This is important because as air travels through the ducts, it can experience turbulence and pressure drops, which can affect the efficiency of the system. A reducing plenum helps to evenly distribute the air, ensuring consistent and efficient airflow throughout the building. Choice A is incorrect because connecting duct sections does not relate to the purpose of a reducing plenum system. Choice B is also incorrect because observing or evaluating a lesson does not pertain to HVAC systems. Choice D is incorrect for the same reason as choice B.