FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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

Prepare for the FAA AMT Airframe Exam with our comprehensive quiz. This resource offers multiple-choice questions designed to enhance your knowledge and understanding of aviation maintenance concepts.

Start Multiple Choice Practice Test
Start Flash Cards

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 is the condition of the refrigerant as it enters the evaporator in a vapor cycle cooling system?

  1. High pressure liquid

  2. High pressure vapor

  3. Low pressure vapor

  4. Low pressure liquid

The correct answer is: Low pressure liquid

In a vapor cycle cooling system, the refrigerant enters the evaporator as a low-pressure liquid. This is because, after passing through the expansion valve, the high-pressure liquid expands and evaporates in the evaporator due to the low pressure and temperature conditions present there. As the refrigerant absorbs heat from the cabin air passing over the evaporator coils, it undergoes a phase change from liquid to vapor, which is essential for the cooling process to occur efficiently. Regarding the other options: A. High-pressure liquid - This is incorrect because the refrigerant needs to be at a lower pressure to evaporate and absorb heat in the evaporator. B. High-pressure vapor - This is incorrect as the refrigerant should be in a liquid state when entering the evaporator, not as a vapor. C. Low-pressure vapor - This is also incorrect because the refrigerant is in a liquid state as it enters the evaporator, ready to absorb heat and evaporate inside the coils.

More Questions Like This