Blow-off of the relief valves of the main cylinders during o

【名词&注释】

塑性变形(plastic deformation)、部分和(partial sum)、润滑剂(lubricant)、增压器(turbocharger)、二硫化钼

[单选题]Blow-off of the relief valves of the main cylinders during operation indicates （）.

A. the cylinder cover is cracked
B. the injector holes is clogged
C. the cams are not properly set
D. fuel pump is leaking

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学习资料：

[单选题]在上紧重要螺栓的螺母之前，应将螺纹部分和各承压面彻底清洁干净并涂以适当的润滑剂（如二硫化钼），其主要目的是（）。

A. 防止螺母螺纹和承压面产生塑性变形
B. 防止螺母和螺栓的螺纹及螺母和承压面之间咬住
C. 容易上紧
D. 有利拆卸

[单选题]航行中增压器发生严重的故障时，根据海况不同可供采取的应急措施有（）。Ⅰ.停增压器；Ⅱ.停航；Ⅲ.锁住转子；Ⅳ.拆除转子；Ⅴ.降速航行。

A. Ⅲ＋Ⅳ＋Ⅴ
B. Ⅰ＋Ⅲ
C. Ⅰ＋Ⅲ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]通常艉轴管装置主要由（）构成。Ⅰ.艉轴管本体，Ⅱ.衬套，Ⅲ.轴承衬，Ⅳ.艉轴承，Ⅴ.密封装置。

A. Ⅱ＋Ⅲ
B. Ⅰ＋Ⅱ＋Ⅳ
C. Ⅰ＋Ⅳ＋Ⅴ
D. Ⅰ＋Ⅲ＋Ⅳ

[单选题]A separate piston cooling system is used to limit any contamination （） piston cooling glands（） the piston cooling system only.

A. between；to
B. either；or
C. from；to
D. neither；nor

[单选题]The diesel engine is a type of （）.

A. turbine engine
B. gas turbine
C. steam engine
D. internal combustion engine

[单选题]The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.

A. sliding piston rings
B. engines camshaft
C. small pumps
D. forced feed system

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