9. 船舶製水淡化裝置加熱管，管內除垢藥劑為下列何者？ (A) 氫氧化鈉 (B) 氯化鈉 (C) 酸性物質 (D) 氫氧化鎂

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.