Refrigeration Plant Operator B Full Practice Test 2025

Question: 1 / 400

In a recirculation system, where is it critical to maintain a constant pump pressure?

At the compressor inlet

At the condenser outlet

At the metering valve evaporation inlet

Maintaining a constant pump pressure at the metering valve evaporation inlet is crucial because this is the point where the refrigerant enters the evaporator. The metering valve regulates the flow of refrigerant, ensuring that it expands properly as it enters the evaporator. If the pressure at this point fluctuates, it can lead to inefficient evaporation of the refrigerant. Inconsistent pressure can cause improper cooling, overheating of the compressor, and overall system inefficiency.

By ensuring a constant pressure at the metering valve evaporation inlet, the system can achieve optimal refrigerant flow rates, enhance heat transfer, and maintain the intended cooling capacity. This stability is essential for the operational efficiency of the entire refrigeration cycle, as it allows the evaporator to perform effectively, leading to reliable and consistent cooling performance.

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At the evaporator outlet

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