【单选题】【消耗次数：1】
曲轴箱通风的目的主要是
①
排出水和汽油
②
排出漏入曲轴箱内的可燃混合气与废气
③
冷却润滑油
④
向曲轴箱供给氧气
参考答案：
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相关题目
【单选题】
曲轴主轴颈与主轴瓦的配合间隙用经验检查法： 用手拨动已按规定力矩拧紧在缸 体上的曲轴的曲柄， 曲轴应能靠惯性转动几圈为合适
①
0.25～0. 5 圈
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1～1. 5 圈
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0.5～1 圈
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2～3 圈
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