航海英語船舶設(shè)備名稱單項(xiàng)選擇題每日一練(2019.01.07)

來源：考試資料網(wǎng)

1 In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.

2 Each cylinder in a two stroke cycle engine experiences combustion（）.

3 The most common type of davit found on merchant vessels today is the（）.

4 Aboard ship，vertical flat plates running transversely and connecting the vertical keel to the margin plates are called（）.

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5 A single fitting installed in a pipeline that either blanks off the pipe or allows a full flow passage of a liquid through the pipe is referred to as a（）.

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