🔍 Key Concepts

• Flash-type evaporator flow path: where the seawater is first heated, then flashed into vapor, then condensed • Scale formation: calcium and magnesium salts precipitate where seawater is hottest on metal surfaces • Difference between components that handle seawater/brine vs. those that handle vapor or fresh condensate

💭 Think About

• Trace the path of the seawater: at which piece of equipment is the seawater at its highest temperature while still in liquid contact with metal surfaces? • Which option describes equipment that has hot seawater/brine inside the tubes versus relatively cooler vapor or condensate? • In a flash-type evaporator, where would dissolved salts actually be able to deposit—on surfaces in contact with salt water, or on surfaces in contact mainly with vapor or fresh water?

✅ Before You Answer

• Identify which choices involve direct contact with hot seawater or brine (not just vapor or distilled water). • Consider which part operates at the highest temperature on the seawater side just before flashing occurs. • Eliminate any components that primarily handle air, vapor, or distilled water, where salt scale would not normally form.