輪機英語船舶動力裝置單項選擇題每日一練(2019.01.13)

來源：考試資料網(wǎng)

1 Fuel oil is thought to be one of the main factors （） the operation and maintenance of an engine.

2 Vents are led from the engine to head tank （） from the cooling water.

3 （） is used for washing and drinking.

4 On a four-stroke diesel engine, when the piston is driven downwards by the expanding gas, it delivers power to the crankshaft through the （）.

5 For an ordinary four-stroke engine the exhaust valves open （）.