🔍 Key Concepts

• Behavior of refrigerants during expansion and evaporation • Effect of sudden cooling on any residual moisture or water in the system • How pressure and temperature changes can impact chiller components during initial charging

💭 Think About

• When you introduce refrigerant into a near vacuum, what happens to its temperature if it flashes off quickly? • If there is any residual moisture or water in the chiller tubes, how would very rapid cooling affect it? • Which option best matches a physical effect likely to occur inside the chiller at start-up, rather than a control or safety device response?

✅ Before You Answer

• Check which choices refer to physical conditions inside the chiller versus external safety devices • Consider how phase change (liquid to vapor) affects temperature and the risk of freezing any trapped water • Verify which option directly relates to the consequences of rapid evaporation and cooling during the initial charge