輪機(jī)英語船舶輔助機(jī)械單項選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 The heat identified by only a change in temperature is known as （）.

2 The correct pH value of boiler water is achieved by continuous addition of a suitable （） to the feed.

3 Oil water separators are used to ensure that ships dont discharge oil when pumping out （）.

4 （） may be fitted for operating the derrick topping lift (the wire which adjusts the derrick height).

5 The various pumps and lines are （） to some extent so that each pump can act as an alternative for another.