Which of the conditions listed will cause a refrigeration compressor to run constantly

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Which of the conditions listed will cause a refrigeration compressor to run constantly without simultaneously decreasing the temperature in the refrigerated space?( )

A.Shortage of refrigerant oil

B.Slight shortage of refrigerant

C.Excessive condenser cooling water flow

D.Faulty expansion valve

参考答案:

B解析：refrigeration：冷藏，制冷;constantly：恒定地;simultaneously：同时;de-crease：减少;refrigerate：冷藏，制冷;refrigerant：制冷剂;slight：轻微译文：如果制冷压缩机持续运转的同时被冷却空间没有降温，其原因可能是制冷剂不足。

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