32. 下列何者是爐水造成鍋爐腐蝕的主要原因？ (A) pH值高 (B) 生物腐蝕 (C) 溶氧腐蝕 (D) 苛性軟化

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.