航海英語液體散貨運(yùn)及有關(guān)規(guī)則單項(xiàng)選擇題每日一練(2019.01.22)

來源：考試資料網(wǎng)

1 In setting the valves on a steam-smothering system on a tanker，the master control valve to cargo tanks should be（）.

2 A wooden plug fitted tightly in the vent of a damaged tank may prevent the tank from（）.

3 A virtual rise in the center of gravity of a ship may be caused by（）.

4 When planning the loading or discharging of a VLCC (100，000 DWT+) what is the most important consideration?（）

5 Oil may NOT be transferred unless（）.