輪機英語船舶動力裝置單項選擇題每日一練(2019.01.14)

來源：考試資料網(wǎng)

1 The pH value of water in a diesel engine closed cooling water system should be maintained between （）.

2 With （） unit the timing of fuel injection of an engine can be regulated automatically.

3 The primary duty of lube oil is to reduce （） between the working parts of an engine.

4 The working cycle of a four-stroke diesel engine consists of four events:（）
(1) compression
(2) expansion
(3) exhaust
(4) suctionThe correct sequence is

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5 Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）

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