輪機(jī)英語船舶動(dòng)力裝置單項(xiàng)選擇題每日一練(2019.01.17)

來源：考試資料網(wǎng)

1 A diesel engines crankcase oil level is found to be too high√ You should suspect that （）.

2 The cylinder is fitted with internal liner so that a water space is left （） the liner and the outer wall.

3 The lower end of each piston rod is reduced in diameter to fit a bore in the （）, this being secured to the piston rod by a nut.

4 Turbulence in a diesel engine cylinder is of major importance in providing （）.

5 Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.