輪機(jī)英語船舶動(dòng)力裝置單項(xiàng)選擇題每日一練(2019.05.09)

來源：考試資料網(wǎng)

1 A lubricant often has to perform many duties in any situation, in addition to its fundamental job of （）.

2 The main function of the lubrication system in to enable （） of a film of oil between the moving parts.

3 As a heat engine,（） energy is the source of power by which the diesel engine can be operated.

4 The injector pump is operated by a cam which drives （） up and down.

5 The rising of the exhaust temperature in manifold pipe may NOT result from （）.