题目内容

四冲程柴油机某缸气缸启动阀卡死不能开启而使曲轴停在某一位置不能启动时，下列说法正确的是（）。

A. 飞轮指示在上止点后0°～140°的缸为故障缸
B. 飞轮指示在上止点后0°～140°进排气阀都关闭的缸为故障缸
C. 飞轮指示在上止点后0°～140°排气阀关闭的缸为故障缸
D. 飞轮指示在上止点后0°～120°的缸为故障缸

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