正确答案: D

Excessive

题目：（） 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.

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学习资料的答案和解析：

[单选题]贮备可以提高可靠性，它和其他提高可靠性方法的原则区别，在于可使系统的可靠性（）部件本身的可靠性。

高于

[单选题]防止增压器振动的措施包括（）。Ⅰ.定期换新轴承；Ⅱ.定期清洗叶片；Ⅲ.定期检查安装间隙；Ⅳ.转子定期检查磨损和变形；Ⅴ.转子定期作动平衡试验。

Ⅰ＋Ⅱ＋Ⅲ＋Ⅳ＋Ⅴ

[单选题]All the rings are slightly rounded on their external top and bottom edges to keep the oil film on the cylinder liner during （） for new piston rings.

the running-in period

[单选题]Please draw out a 01 mm （） between the two halves of the bearing to reduce the clearance.

shim

[单选题]When to remove scale from the cooling spaces, acid solution （） in the system can be tested from time to time by putting some on to a piece of lime.

strength

[单选题]High firing pressures and a low exhaust temperature in a diesel engine may result from （）.

early fuel injection timing

[单选题]What condition will result in the automatic shutdown of a diesel engine? （）

Low lube oil pressure