27. 一般規定在輸送燃油與滑油之管路，組裝前應先經過何種處理？ (A) 酸洗處理 (B) 磷酸表面處理 (C) 鍍鋅處理 (D) 內襯處理

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.