轴系校中完毕，要求实测中间轴承的负荷，允差为（）。

【名词&注释】

区域内(intra-region)、静平衡试验(static balance test)、不允许(not allow)

[单选题]轴系校中完毕，要求实测中间轴承的负荷，允差为（）。

A. 5%
B. 10%
C. 15%
D. 20%

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学习资料：

[单选题]轴系两端轴的同轴度是通过测量轴系两端轴法兰上的（）来衡量。

A. 偏移值
B. 总偏中值
C. 偏中值
D. 总偏移值

[单选题]桨叶上A区位于桨叶压力面0.4R以内范围，该区域内的缺陷一般不允许（）修理。

A. 有机胶黏剂
B. 无机胶黏剂
C. 金属扣合工艺
D. 焊补

[单选题]桨叶经焊补修理后，为保证焊补质量应进行（）等处理。Ⅰ.磨光；Ⅱ.着色探伤；Ⅲ.测螺距；Ⅳ.静平衡试验；Ⅴ.退火。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅴ
C. Ⅲ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ

[单选题]As for a diesel engine, lack of combustion air may be due to （）.

A. fouling turbine
B. fuel pump faults
C. lubrication failure
D. excessive cooling

[单选题]The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is （）

A. the same, whether at sea, or during maneuvering
B. adjusted during each hour of operation while at constant RPM
C. higher at sea than while maneuvering
D. lower at sea than while maneuvering

[单选题]The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）

A. regulating the level of corrosion inhibitor in the primary cooling system
B. the level of the freshwater expansion tank
C. varying the engine load to meet temperature requirements
D. the operation of the thermostatic valve

[单选题]A towing vessel’s capability is BEST measured by horsepower，bollard pull，maneuverability and（）.

A. displacement
B. stability
C. towrope pull
D. propeller desig

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