While at sea, the flash type evaporator is...

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Question 1 of 205eccef9cbacbc34ba4d457f3

While at sea, the flash type evaporator is discharging the output to the boiler water reserve feed tanks. If it becomes necessary to reduce the evaporator feed water temperature to below 165°F, you should _______.

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🔍 Key Concepts

• flash type evaporator operating limits (especially minimum feed water temperature) • purpose of the three‑way dump valve and its trip/set point • reasons for protecting boiler feedwater quality when conditions go out of spec

💭 Think About

• Ask yourself what the manufacturer’s minimum feed temperature limit is trying to protect: efficiency only, or also water quality and carryover into the distillate? • Which action keeps off‑spec distillate from ever reaching the reserve feed tanks, rather than trying to "work around" the limit? • Which option affects vacuum and evaporation rate versus which options affect whether distillate is allowed into the boiler system at all?

✅ Before You Answer

• Verify what happens to distillate purity and possible contamination when the evaporator is operated below its recommended feed temperature • Identify which component (air ejectors, three‑way dump valve, or securing the unit) actually prevents poor‑quality distillate from entering the reserve feed tanks • Check whether it is acceptable to change trip/set points that were designed to protect boiler water quality just because temperature conditions have changed

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