23. 有關導致冷凍系統壓縮機吸入壓力過低原因之敘述，下列何者錯誤？ (A) 冷媒充填量不足 (B) 膨脹閥結冰阻塞 (C) 壓縮機能力不夠或負荷過大 (D) 膨脹閥開度不夠

5. Before the initial start of the engine after its installation, perform correct inspection and operational preparation and make sure there is no abnormality. Which one is incorrect? (A) Check for a part not tightened yet. (B) Make sure neither part nor tool has been left in the crankcase. (C) Bleed the oil from the lubricating oil strainer. (D) If you have disassembled the valve mechanism, check the suction/exhaust valve head clearance.

23. 有關導致冷凍系統壓縮機吸入壓力過低原因之敘述，下列何者錯誤？
(A) 冷媒充填量不足
(B) 膨脹閥結冰阻塞
(C) 壓縮機能力不夠或負荷過大
(D) 膨脹閥開度不夠

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