Residential HVAC Installation Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

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!

Start Multiple Choice Practice Test
Start Flash Cards

Practice this question and more.

What does it mean to pull a vacuum in a refrigeration system?

  1. Raise the pressure level

  2. Stabilize the pressure

  3. Lower the pressure below atmospheric

  4. Introduce noncondensable gases

The correct answer is: Lower the pressure below atmospheric

Pulling a vacuum in a refrigeration system means lowering the pressure below atmospheric pressure. This process removes any noncondensable gases and moisture that may be present in the system, ensuring optimal performance and preventing potential issues like reduced efficiency or component damage. Stabilizing the pressure or raising the pressure level would not achieve the same goal of evacuating the system of unwanted gases and contaminants, making these options incorrect. Introducing noncondensable gases would be counterproductive to the vacuum process, as the goal is to remove such gases from the system.

More Questions Like This