检测轴系中心线状态时应（）情况下进行。

【名词&注释】

可靠性(reliability)、环境温度(ambient temperature)、中心线(center line)、松紧度、阴雨天(those opened)

[单选题]检测轴系中心线状态时应（）情况下进行。

A. 在各中间轴距法兰端面（0.18～0.22）l处加一临时支承，拆下连接螺栓和使法兰间留有间隙
B. 在拆卸过程中，在夜间或阴雨天^{(those opened)}，停止一切冲击、敲打等振动的
C. 在航行期间掌握轴系技术状态的
D. 拆开各中间轴承，拆下各法兰连接螺栓，调节中间轴和中间轴承的位置的

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学习资料：

[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

A. Ⅰ+Ⅱ
B. Ⅱ+Ⅲ
C. Ⅰ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ

[单选题]在用液压拉伸器检查底脚螺栓的松紧度时，底脚螺栓螺帽附近的机座平面（用于支撑拉伸器的平面）一定要清洁干净，否则可能导致（）。

A. 液压拉伸器内部的密封环损坏漏油
B. 液压拉伸器产生的拉力过大
C. 液压拉伸器产生的升程过大
D. 液压拉伸器产生的拉力过大和液压拉伸器产生的升程过大

[单选题]The bearing shell generally has （） for location and oil grooves round the center of its axial length.

A. tips
B. tags
C. lips
D. key

[单选题]（） should not undertake any task which will interfere with the supervision duties relating to the main machinery and associated equipment.

A. The watch keeping personnel
B. The chief engineer
C. The person on a bunker barge
D. Any of the above

[单选题]The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.

A. the beginning of the compression stroke
B. the beginning of the suction stroke
C. the end of the working stroke
D. the end of the exhaust stroke

[单选题]The opening or closing of the cylinder starting valve is controlled by （）.

A. the starting air distributor
B. the cut-off valve on the air main
C. the main starting valve
D. the air bottle control valve

[单选题]Improper maintenance of the fuel oil burners in an automatically fired auxiliary boiler, could result in （）

A. increased fuel consumption
B. increased feed water consumption
C. fuel pump failure
D. combustion control system failure

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