【名词&注释】
气缸套(cylinder liner)、冷却水腔(cooling water-jacket)、注油孔(grease hole)、舵系中心线
[单选题]检查舵系中心线状态的方法采用()。
A. 平轴法
B. 平轴计算法
C. 拉线法
D. A或B或C
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学习资料:
[单选题]发动机的长度可决定()。
A. 机舱的长度
B. 机舱的宽度
C. 船舶的宽度
D. B+C
[单选题]在船上吊缸检查气缸套时,不必()。
A. 测量缸套直径
B. 观察缸套表面
C. 疏通注油孔及注油器
D. 清理气缸套冷却水腔水垢
[单选题]The scavenging air ports are located at () that they are just exposed by the upper edge of the piston when the piston is in the bottom dead center position.
A. so a height
B. such a height
C. so high
D. such high
[单选题]Cross scavenging requires the fitting of () to prevent air or exhaust gas escape when the piston is at the top of the stroke.
A. a exhaust valve
B. a piston skirt
C. a piston crown
D. an air suction valve
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