Prepare for the Residential HVAC Installation Exam with comprehensive study materials and multiple choice questions. Gain insights into heating, ventilation, and air conditioning to ace your test. Get started now!

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.


What type of duct systems can be plenum, extended plenum, reducing plenum, or perimeter loop?

  1. Spiral duct system

  2. Round duct system

  3. Rectangular duct system

  4. Oval duct system

The correct answer is: Round duct system

The correct answer is a round duct system because plenum, extended plenum, reducing plenum, and perimeter loop are all configurations that can be found in round duct systems. Round duct systems are commonly used in residential HVAC installations due to their efficiency and ease of installation. Rectangular duct systems, which are mentioned in choice C, do not typically have configurations like plenum, extended plenum, reducing plenum, or perimeter loop. Spiral duct systems, mentioned in choice A, are a type of round duct system but do not specifically refer to the configurations listed in the question. Oval duct systems, mentioned in choice D, also do not typically have the specific configurations mentioned in the question.