【名词&注释】
平均值(average)、填料函(stuffing box)、活塞杆填料、螺旋桨桨叶(propeller blades)、运行时(run-time)
[单选题]更换艉轴铜套的极限厚度为()。
A. 0.02d+5mm
B. 0.015d+3.5mm
C. 0.03d+7.5mm
D. 0.01d+2mm
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学习资料:
[单选题]活塞杆填料函的泄放管是与()连通的,主机运行时(run-time)可以从泄放管的工作状态判断填料函工作是否正常。
A. 下部密封环
B. 下部刮油环
C. 中部刮油环
D. 上部密封环
[单选题]合成材料艉轴承中以()艉轴承应用日益增多。
A. 尼龙
B. 赛龙
C. 环氧树酯
D. 塑料
[单选题]螺旋桨桨叶B区内的较小缺陷,深度<t为/30(t为叶厚,mm)或3mm可以采用()其中较大的缺陷。
A. 修磨
B. 焊补
C. 粘接
D. 金属扣合工艺
[单选题]桨叶上同一半径截面上的局部螺距的算术平均值称为该截面的()螺距。
A. 总
B. 截面
C. 平均
D. 桨叶
[单选题]The fourth engineer accompanied by the workers on oil barge measures the oil levels, temperature and () in the tanks.
A. tank table
B. trim
C. water contents
D. oil pressure
[单选题]Fuel injectors used in heavy fuel oil systems are usually provided with cooling to reduce().
A. cold corrosion of the nozzles
B. fuel viscosity for better atomization
C. carbon accumulation on the nozzles
D. fuel detonation in the cylinder
[单选题]White smoke exhausting from an operating diesel engine may indicate ().
A. a cracked liner
B. burning lube oil
C. an overloaded engine
D. insufficient combustion air
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