正确答案: B

Bedplate

题目：A （）is the foundation of the engine, without the support of which the shaft alignment in particular, and engine structure as a whole, would inevitably be lost.

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学习资料的答案和解析：

[单选题]最早用于海船上的蒸汽动力装置是（）。

往复式蒸汽机

[单选题]柴油机纵向校中是指在（）上活塞运动部件与固定件有准确的相对位置。

柴油机首、尾方向

[单选题]测量曲轴臂距差后，应对所测数据依据（）进行分析和判断。

柴油机说明书和有关标准

[单选题]For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.

a sump

[单选题]Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.

aluminum alloy

[单选题]Smaller engines can be made more rigid than large ones and may not have （）.

through bolt

[单选题]Which of the following may cause that an engine doesnt run on starting air?（）

A and B

[单选题]The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.

seawater contamination

[单选题]Exhaust valve grooving and corrosion is caused by certain components of residual fuel oilThese components are sodium, sulfur, and （）.

vanadium