正确答案: B

排气倒流

题目：四冲程柴油机停增压器运转产生的主要问题是（）。

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学习资料的答案和解析：

[单选题]测量发现，活塞在近上、下止点位置时，活塞在气缸中均偏左或均偏右的极端位置（活塞与气缸间隙为零，而一侧间隙最大），这是由于（）原因所致。

导板与气缸中心线距离过大或过小

[单选题]In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.

oil

[单选题]The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.

opened