Water Damage Restoration Technician (WRT) Certification Practice Test

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Enhance your career with the Water Damage Restoration Technician Certification. Test your knowledge with multiple-choice questions that include hints and explanations. Prepare thoroughly for the WRT exam!

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What process occurs when vapor changes to a liquid due to energy being removed?

Evaporation
Condensation
Sublimation
Dehumidification

The correct answer is: Condensation

The process that occurs when vapor changes to a liquid due to energy being removed is known as condensation. This phenomenon happens when water vapor in the air cools down and loses energy, resulting in the formation of liquid water droplets. In the context of water damage restoration, understanding condensation is crucial because it often occurs on surfaces that are cooler than the surrounding air, such as windows, walls, or ceilings, especially in environments with high humidity. This can lead to issues like mold growth and damage to building materials if not properly managed. Evaporation, on the other hand, is the process of a liquid turning into vapor when energy is added, which is the opposite of condensation. Sublimation refers to the transition of a substance from solid to vapor without passing through the liquid phase, and dehumidification is a process aimed at reducing humidity, but it does not specifically refer to the energy removal that causes vapor to turn into liquid.