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必典考网发布"舵杆上()的纵向裂纹可焊补修理。"考试试题下载及答案,更多船舶动力装置题库的考试试题下载及答案考试题库请访问必典考网海船船员考试题库频道。
[单选题]舵杆上()的纵向裂纹可焊补修理。
A. 长度<1/4公称直径、深度<10%公称直径
B. 长度<1/5公称直径、深度<10%公称直径
C. 数量不超过2条且不在同一条直线上
D. 数量不超过4条
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[单选题]The external circumference of a pair of main bearing shells is slightly larger than that of the bore of the housing which receives themThe difference is termed ().
A. nip
B. nap
C. gap
D. li
[单选题]The hand steering is a method by which the motion of the rudder is controlled with ().
A. a motor-driven steering wheel
B. a pneumatic steering wheel
C. a hand-driven steering wheel
D. an electric steering wheel
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