航海英語貨物裝卸貨作業(yè)單項選擇題每日一練(2019.01.10)

來源：考試資料網(wǎng)

1 What is a characteristic of all centrifugal cargo pumps? （）

2 Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.

3 The Master or person in charge of a ship shall ensure the crane record book shows the（）.

4 What is the purpose of pressure-vacuum relief valves? （）

5 Which method should be used to warm up the pump turbines prior to discharge（）.