正确答案: A

小于允许值

题目：轴系中心线的偏差度应（）。

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学习资料的答案和解析：

[单选题]按轴承允许负荷校中时，下述正确的是（）。

各轴承的负荷在允许值内

[单选题]桦木层压胶木是铁梨木的代用材料，具有材质致密、坚硬、耐热、绝缘性好、成材率高，缺点是（）。Ⅰ.耐磨性差；Ⅱ.耐蚀性差；Ⅲ.耐水浸性差；Ⅳ.刚性差；Ⅴ.脆性大。

Ⅰ＋Ⅴ

[单选题]Keep compartment （） as the gas given off can be dangerous.

well ventilated

[单选题]The indications of a scavenge fire are excessive black smoke, （） and peeling from scavenge trunking.

all above are right

[单选题]The position of the piston parts in relation to each other is secured by means of （） in the crown.

a dowel pin

[单选题]Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.

lube oil vapors in the crank case