航海英語液化氣體與IGC規(guī)則單項(xiàng)選擇題每日一練(2019.08.04)

來源：考試資料網(wǎng)

1 Each inert gas system must be designed to supply the cargo tanks with a gas，or mixture of gasses，that has an oxygen content by volume of（）.

2 What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.

3 What is used to test a tank for oxygen content?（）

4 The weight of liquefied petroleum gas vapors as compared to air is（）.

5 To determine the pressure and temperature limitations under which LFG is required to be transported on a barge，you should look at the（）.