During the operation of a large multi-box...

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Question 1 of 205eccef9dbacbc34ba4d46075

During the operation of a large multi-box refrigeration system, using a fixed capacity compressor, only two of the five boxes are in the process of actively being cooled. If two additional boxes were to be brought into the cooling process simultaneously, how would the system react?

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🔍 Key Concepts

• Behavior of a fixed-capacity compressor when system load suddenly increases • Relationship between evaporator load (more boxes calling for cooling) and suction/low-side pressure • Difference between temporary (transient) changes and new steady-state conditions in a refrigeration cycle

💭 Think About

• When you open two more boxes to active cooling, what happens to the amount of refrigerant boiling off in the evaporators at that moment? How does that affect suction pressure at the compressor inlet? • Does adding warm product/air to be cooled make the compressor’s job easier or harder? Think about whether the compressor can instantly change capacity or not. • Which side of the system (high side vs low side) is directly affected first when you increase the evaporator load?

✅ Before You Answer

• Focus on the low side (suction side) behavior immediately after more evaporators are brought online, not long-term steady state. • Ask yourself whether condensing pressure and subcooling are the first to react, or whether the change is seen first at the evaporators and compressor suction. • Verify that the answer choice refers to a temporary (initial) reaction of the system, not a permanent condition.

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