【名词&注释】
磨损率(wear rate)、柴油机(diesel engine)、液压油(hydraulic oil)、铸铁气缸套(cast iron cylinder sleeve)
[单选题]大型低速柴油机铸铁气缸套(cast iron cylinder sleeve)的正常磨损率应()mm/kh。
A. >0.05
B. <0.08
C. <0.1
D. >0.15
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学习资料:
[单选题]为了防止液压拉伸器密封环的损坏,在()设计了特殊的泄油孔,当活塞的升程超过了其“最大升程”时,液压油会迅速从泄油孔泄放。
A. 活塞顶部
B. 油缸的侧面
C. 活塞的底部
D. 油缸的下部
[单选题]水润滑艉轴铜套过度磨损可()修复。
A. 光车
B. 堆焊
C. 喷焊
D. 更换
[单选题]铁梨木艉轴承和层压胶木艉轴承的极限间隙可近似等于()倍的安装间隙。
A. 2
B. 3
C. 4
D. 5
[单选题]A variable pitch propeller is made () a boss with separate blades mounted into it.
A. of
B. up of
C. from
D. out
[单选题]In a central cooling system, used in some modem ships, sea water is supplied to cool ()which will circulate to other individual cooler, greatly reducing the corrosion problems.
A. main bearings
B. sea water
C. cooling oil
D. lower temperature fresh water
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