【名词&注释】
不合适(inconcinnity)、低速柴油机(low speed diesel engine)、液压油黏度
[单选题]利用液压拉伸器上紧贯穿螺栓时,如果拉伸器的油压仅达到上紧压力的50%时泄油孔就出现漏油现象,这种现象可能是()。
A. 上密封环失效
B. 下密封环失效
C. 液压油黏度不合适
D. 上密封环失效或下密封环失效
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学习资料:
[单选题]吊缸检查气缸盖的气阀时,主要检查()的损伤情况。
A. 阀面和阀盘
B. 阀面和阀座
C. 阀杆和气动活塞(或弹簧)
D. 阀面和气动活塞或弹簧
[单选题]某些新型大型低速柴油机的气缸盖上,设有用来拆卸缸盖螺帽的液压装置(液压环)和配备了专用环形六角扳手,该扳手的作用是()。
A. 通入液压油时,用来松紧缸盖螺帽
B. 液压装置失效时,用来松开缸盖螺帽
C. 液压装置失效时,用来上紧缸盖螺帽
D. 通入液压油时,用来松紧缸盖螺帽和液压装置失效时,用来上紧缸盖螺帽
[单选题]() clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.
A. Too larger
B. Too smaller
C. Excess
D. Excessive
[单选题]After the engine is warned, we should() the turning gear before starting up the engine.
A. take in
B. put in
C. take out
D. put u
[单选题]The operation between two fuel injections is called a ().
A. turning cycle
B. working cycle
C. working hour
D. working stroke
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