Question 21Refrigeration/AC - 1st Asst/Chief70% to pass
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?
AI Explanation
The correct answer is B) Crankcase pressure regulator.
The crankcase pressure regulator is used to prevent excessive gas pressure at the compressor suction during the initial cooling down of a refrigeration system. This helps prevent overloading of the compressor driver by maintaining the suction pressure within safe operating limits.
The other options are not correct: A) High-pressure cutout is used to protect the system from excessive discharge pressure, C) Low-pressure cutout is used to protect the compressor from operating at too low a suction pressure, and D) Solenoid valve is used to control the flow of refrigerant, not specifically to regulate suction pressure.
Related Questions
#19 In a refrigeration system that is not protected by a water failure switch, if the cooling water to the condenser fails, what will be the result for protective purposes? #20 When the relief valve opens on a refrigeration compressor discharge line, it discharges high-pressure refrigerant vapor to what location? #22 Which of the conditions listed could cause excessively low refrigerant pressure at the compressor suction of a TXV controlled refrigeration system? #23 An excessive charge of refrigerant in a thermostatically controlled, air-cooled, refrigeration system using a TXV as an expansion device can cause which of the following? #24 Low compressor head pressure in a refrigeration system can be caused by which of the following?