正确答案: C

海损事故

题目：一般来说，轴系中心线的同轴度偏差是由于（）造成的。

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学习资料的答案和解析：

[单选题]要充分利用排气余热而降低废气锅炉出口温度t2，同时还应保证锅炉受热面必需的温度，该温差是（）。Ⅰ.排气与给水的温度t2-tw；Ⅱ.排气与蒸汽的温度t2一ts

Ⅰ+Ⅱ

[单选题]All three systems have the ports （） to swirl the incoming air and direct it in the appropriate path.

being rounded

[单选题]It is necessary to remove （） from the cooling spaces.

scale

[单选题]The hot expanding gas rotates the blades of the exhaust turbine, thus giving out large part of its power, which drives （）.

the compressor

[单选题]The needle valve in a fuel valve will （） when the fuel pressure action on the needle valve tapered face exerts a force lower than that of the spring compression.

be seated

[单选题]When the starting air valve closes on one cylinder, another starting air valve has （） opened on another cylinder whose piston has just commenced its downward stroke.

already

[单选题]The crankcases of many diesel engines are kept under a slight vacuum to （）

reduce the risk of explosion

[单选题]Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.

feeler gauge