正确答案: A

盘车一周应测完5个数值

题目：在柴油机已装活塞运动部件的情况下测量臂距值时，为了准确测量臂距值（）。

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学习资料的答案和解析：

[单选题]动力装置燃料消耗率bz是指动力装置每小时燃油总消耗量与（）之比。Ⅰ.螺旋桨吸收功率；Ⅱ.螺旋桨推力功率

仅Ⅱ对

[单选题]缸盖底面裂纹一般多产生在（），即有应力集中的部位。Ⅰ.阀孔周围；Ⅱ.阀孔边缘；Ⅲ.阀孔之间；Ⅳ.阀孔座面；Ⅴ.底面圆周方向。

D．Ⅱ＋Ⅲ

[单选题]Generally the function of lubrication is to form of a film of lubricant between any two surfaces that have relative （）, so that surfaces dont get touch with each other.

motion

[单选题]The carbon deposits on the piston crown and in the ring grooves （）.

should be scraped

[单选题]Directional intake ports in diesel engines are used to （）.

induce air swirl

[单选题]A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （）(1) MEP is lower and the scavenging air is cooling the exhaust gases(2) valve overlap in a four-stroke

(1) only is correct