An overspeed safety device is usually fitted to a generator

【名词&注释】

松紧度、排气阀阀杆

[单选题]An overspeed safety device is usually fitted to a generator engine for （） in the event of overspeed.

A. cutting power off the engine
B. increasing the fuel pump setting
C. braking the crankshaft
D. stabilizing the ship speed

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学习资料：

[单选题]排气阀阀杆磨损超过标准要求时，可采用（）工艺修复阀杆。也可以采用喷涂或喷焊工艺修复。

A. 镀铬或镀铁
B. 焊接
C. 堆焊
D. 镀铁

[单选题]在用液压拉伸器检查底脚螺栓的松紧度时，底脚螺栓外露的螺纹部分一定要清洁干净，否则可能导致（）。

A. 底脚螺栓被拉断
B. 底脚螺栓被拉弯
C. 底脚螺栓与拉伸器咬住
D. 底脚螺栓被拉断或拉弯

[单选题]Head tank should be used to remove （） from cooling water.

A. scale
B. sludge
C. chemicals
D. air

[单选题]Increasing the load on an engine equipped with a constant speed mechanical governor, will cause the engine speed to initially （）.

A. increase
B. decrease
C. fluctuate
D. remain constant

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