【名词&注释】
可靠性(reliability)、环境温度(ambient temperature)、直线度误差(straightness error)
[单选题]铁梨木尾轴后轴承的长度不应()。
A. 小于尾轴轴颈的2,5倍
B. 大于尾轴轴颈的2.5倍
C. 小于尾轴轴颈的4倍
D. 大于尾轴轴颈的4倍
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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]涡轮壳体局部腐蚀较重,可采用()修理。
A. 有机粘接
B. 焊补
C. 局部更换
D. 更换壳体
[单选题]如果两根中间轴连接法兰的位置处于两轴承间距的中间,则轴系会出现()。Ⅰ.轴系挠度过大;Ⅱ.轴系难以准确对中;Ⅲ.安装不方便
A. Ⅰ+Ⅱ
B. Ⅱ+Ⅲ
C. Ⅱ+Ⅲ
D. Ⅰ+Ⅱ+Ⅲ
[单选题]舵杆弯曲变形时直线度误差>2mm/m,允许采用()修复。
A. 冷校直
B. 热校直
C. 加热-机械校直
D. 机械校直
[单选题]Fuel is not supplied to the corresponding cylinders due to ().
A. a failure of the motor
B. a failure of lubricator
C. a failure of cylinder
D. a failure of fuel pum
[单选题]The correct tightening is obtained by use of () to measure the extension given to the bolts.
A. pressure gauges
B. stretch gauges
C. thermometers
D. bridge gauge
[单选题]Since the engine doesn’t work well, you’d better () as soon as possible.
A. reduce its speed
B. find out its trouble
C. eliminate its trouble
D. all the above
[单选题]A VLCC (100,000 DWT+) with a 30,000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a().
A. bigger propeller
B. smaller power weight ratio
C. smaller propeller
D. larger power weight ratio
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