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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Which is NOT a type of duct system?

Plenum
Reducing plenum
Return plenum
Ceiling plenum

The correct answer is: Ceiling plenum

A ceiling plenum is not a type of duct system. A plenum is a central distribution box for HVAC systems that connects to various ducts to distribute air throughout a building. The reducing plenum is designed to decrease the size of the ductwork gradually for efficient airflow, while the return plenum connects the return ductwork to the HVAC system. However, a ceiling plenum typically refers to the space between a drop ceiling and the structural ceiling and is not a type of duct system.