During the initial cooling down of a box...

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Question 1 of 205eccef9dbacbc34ba4d45f71

During the initial cooling down of a box temperature in a refrigeration system, which of the devices listed is used to prevent excessive gas pressure at the compressor suction for the purpose of prevention of overloading of the compressor driver?

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🔍 Key Concepts

• Function and location of each refrigeration control device listed: high-pressure cutout, low-pressure cutout, crankcase pressure regulator, solenoid valve • What happens to suction pressure and compressor load when a warm box is first pulled down to temperature • Which devices are designed to protect the driver from overload versus protect the system from abnormal pressure conditions

💭 Think About

• Ask yourself: During pull-down from a warm condition, does the suction pressure tend to be high or low, and which device is meant to control that specific pressure at the compressor inlet? • Which of the listed devices directly limits the pressure entering the compressor crankcase/suction rather than simply shutting the system off at a limit point? • Think about which control operates continuously to modulate pressure versus which ones are simple on/off safety cutouts or liquid line controls

✅ Before You Answer

• Identify which devices are safety cutouts (high or low pressure) versus pressure regulators that modulate flow/pressure • Confirm which device is located in or near the compressor suction/crankcase line, not the discharge or liquid line • Make sure the option you choose is specifically intended to prevent motor/compressor overloading during initial pull-down, not just to stop operation in an emergency

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