【名词&注释】
活塞环(piston ring)、包扎法(fasciation)、适用于(suitable for)
[单选题]We have stayed at Shanghai port for a long timeThe fouling on the ship’s hull greatly increases her _____.
A. power
B. speed
C. resistance
D. thrust force
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学习资料:
[单选题]The sealing rings are in four parts and pressed together around the piston rods by means of _____
A. nuts
B. bolts
C. coil springs
D. stuffing boxes
[单选题]微动磨损常发生在( )等配合件的结合面上。Ⅰ.主轴颈与主轴承;Ⅱ.键与键槽;Ⅲ,中间轴法兰;Ⅳ.齿轮与轴;Ⅴ.活塞环与环槽。
A. Ⅱ+Ⅳ
B. Ⅰ+Ⅱ+Ⅳ
C. Ⅱ+Ⅲ+Ⅳ
D. Ⅰ+Ⅳ+Ⅴ
[单选题]水的导热速度很快,通常比空气导热快:
A. 6倍
B. 16倍
C. 26倍
[单选题]三角巾包扎法的优点是______。
A. 三角巾制作方便
B. 包扎时操作简捷
C. 适用于各个部位
D. 以上都是
[单选题]keep a gangway watch
A. 值甲板班
B. 值班
C. 值航海班
D. 值舷梯班
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