HVAC Journeyman Practice Exam

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Prepare for the HVAC Journeyman Exam. With our quiz, you'll have access to multiple choice questions, flashcards, and hints to help you through the content. Get ready to pass your exam with confidence!

Practice this question and more.

Where a furnace plenum is not supplied with the furnace, the fabrication and installation shall follow which of the following?

Be no smaller than the outlet/inlet plenum collar
Follow manufacturer's instructions
Be in a workman-like manner
Not interfere with electrical wiring

The correct answer is: Follow manufacturer's instructions

The correct choice emphasizes the importance of adhering to the manufacturer's instructions when fabricating and installing a furnace plenum. Manufacturer's instructions provide specific guidelines and requirements based on the design and functionality of the furnace, ensuring that the plenum will operate efficiently and safely. Following these instructions helps maintain warranty requirements, ensures compliance with safety standards, and minimizes potential operational issues related to airflow and efficiency. While considerations such as the size of the plenum, craftsmanship, and the arrangement of electrical wiring are also important, they are secondary to the manufacturer's specifications. These specifications are tailored to the specific furnace model, taking into account airflow dynamics and overall system performance, which are crucial in HVAC systems. By prioritizing the manufacturer's instructions, the proper functioning and longevity of the heating system are upheld.