航海英語船員職務(wù)名稱單項選擇題每日一練(2019.01.12)

來源：考試資料網(wǎng)

1 During jacking operations and transit，empty void spaces in the hull of a jack up ship provide（）.

2 Fire in an engine compartment is best extinguished with carbon dioxide gas (CO₂) and by（）.

3 During which condition should the operator of a pedestal crane shutdown operations?（）

4 During which condition should the operator of a pedestal crane shutdown operations?（）

5 Each hand portable fire extinguisher on a ship must be marked with（）.