航海英語液化氣體與IGC規(guī)則單項(xiàng)選擇題每日一練(2019.03.27)

來源：考試資料網(wǎng)

1 According to regulations，a cargo hose used for transferring liquefied gases must have a bursting pressure of（）.

2 A spark arrestor（）.

3 On a hydrocarbon flammability chart the line which extends from 0% to 21.8% oxygen，lying tangent to the flammability range，is called the（）.

4 Before starting a gasoline engine on a motorboat，you should make sure for safety that（）.

5 The primary hazard of liquefied petroleum gas and liquefied natural gas is（）.