14. 冷媒的特性中，為何需要求其凝固點低？ (A) 可達低溫冷卻之效果 (B) 可保持低溫下良好之流動性 (C) 可減小壓縮機負荷 (D) 可降低系統之冷媒循環量

) 5. Which situation do not need to stop engine for emergency in the following situations? (A) Moisture is separated from the lubricating oil. (B) An unusual sound has been made. (C) Heat has generated unusually from a part. (D) Smoke is issued from a bearing or any other moving part.