24. 在冷凍系統中，何者為為主要之製冷的元件？ (A) 壓縮機 (B) 冷凝器 (C) 膨脹閥 (D) 蒸發器

8. The followings are procedures of start the engine. Which step is incorrect? (A) Set the stop lever in the RUN position. (B) Make sure the pressure indicator cock is closed. (C) Set the operation selector switch to the ENGINE position control panel to be selected. (D) Make sure the gear pump is in the GEAR OUT position.