Residential HVAC Installation Practice Exam

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Prepare for your Residential HVAC Installation Exam with engaging quizzes and multiple-choice questions. Each question includes hints and insightful explanations to ensure you're ready for the test!

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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.