12. 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

9. The followings are procedures of air running. (1)Set the ENGINE/REMOTE operation selector switch in the ENGINE position. (Alarm panel in engine room) (2)Open the pressure indicator cocks of all the cylinders. (3)Set the start/stop lever in the STOP position. (4)Hold the START switch pressing for 2 to 3 seconds to effect air running. Which one is correct? (A) (1)→(2)→(3)→(4) (B) (1)→(4)→(3)→(2) (C) (4)→(2)→(3)→(1) (D) (4)→(2)→(1)→(3)

12. 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

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