正确答案: C

小于尾轴轴颈的4倍

题目：铁梨木尾轴后轴承的长度不应（）。

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学习资料的答案和解析：

[单选题]可靠性定义中所述及的“规定的条件”，包括（）。Ⅰ.环境温度、压力、湿度；Ⅱ.振动；Ⅲ.承受的负荷

Ⅰ+Ⅱ+Ⅲ

[单选题]涡轮壳体局部腐蚀较重，可采用（）修理。

焊补

[单选题]如果两根中间轴连接法兰的位置处于两轴承间距的中间，则轴系会出现（）。Ⅰ.轴系挠度过大；Ⅱ.轴系难以准确对中；Ⅲ.安装不方便

Ⅰ+Ⅱ+Ⅲ

[单选题]舵杆弯曲变形时直线度误差＞2mm/m，允许采用（）修复。

热校直

[单选题]Fuel is not supplied to the corresponding cylinders due to （）.

a failure of fuel pum

[单选题]The correct tightening is obtained by use of （） to measure the extension given to the bolts.

stretch gauges

[单选题]Since the engine doesn’t work well, you’d better （） as soon as possible.

all the above

[单选题]A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）.

smaller power weight ratio