【名词&注释】
低碳钢(low carbon steel)、疲劳强度(fatigue strength)、灰铸铁(gray cast iron)、金属材料(metal materials)、中碳钢(medium carbon steel)
[单选题]高温下材料的疲劳强度用规定的循环周次下的疲劳强度表示，一般取( )次。
A. 5x105
B. 5x106
C. 5x107
D. 5x109
查看答案&解析
举一反三：
[单选题]If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the
A. fuel line connections to the cylinder injection valves
B. gasket surfaces of the fuel oil filters
C. discharge fittings of the fuel injector pumps
D. suction side of the fuel oil transfer pump
[单选题]In the Second paragraph, the underline word "Who", in such a context, stands for_____.
A. the master or owner of the ship
B. the Administration
C. the Administration, the recognized organization or the nominated surveyor responsible for issuing the relevant Certificate
D. the appropriate authorities of the port State
[单选题]当艇筏上的遇难人员乘登陆完毕后，离开难船的错误行动是：
A. 迅速划离大船
B. 与难船连在一起
C. 立即切断艇索
[单选题]没有缩颈现象的金属材料是( )。
A. 中碳钢(medium carbon steel)
B. 低碳钢
C. 合金铜
D. 灰铸铁
[单选题]客船梯道的净宽度应不小于____mm，对于超过90人的情况，没超过1人则梯道的净宽度应至少增加_______mm
A. 1000/100
B. 700/100
C. 800/10
D. 900/10
[单选题]大型十字头式柴油机活塞运动部件是靠导板、滑块起导向作用和承受侧推力，且_______较大，所以正常运转时活塞外圆表面不会产生磨损
A. 功率
B. 直径
C. 活塞气缸间隙
D. 惯性
[单选题]During the dock repair, when installing the tail shaft and propeller, _____ should be on the spot for supervising
A. chief engineer
B. engineer
C. captain
D. any member of the engine department
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