【名词&注释】
汽轮机(steam turbine)、故障率(failure rate)、磨合期(running-in period)、长短不一、燃气动力装置(gas power plant)
[单选题]每艘船舶的磨合期长短不一,一般为()。
A. 3个月左右
B. 6个月左右
C. 4个月左右
D. 8个月左右
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学习资料:
[单选题]汽轮机动力装置与燃气动力装置(gas power plant)相比,其主要缺点是()。
A. 转速高
B. 效率低
C. 体积大
D. 噪声大
[单选题]能反映故障概率变化情况的是()。Ⅰ.故障率λ(t);Ⅱ.密度函数f(t)
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ,Ⅱ都对
D. Ⅰ,Ⅱ都不对
[单选题]若已知曲柄的轴线状态呈塌腰形,则其两主轴承高度必然()于相邻轴承,测得的臂距差为()值。
A. 低/正
B. 低/负
C. 高/正
D. 高/负
[单选题]The () or balance tank collects the re-circulated fuel oil.
A. buffer
B. sump
C. bilge
D. overflowing
[单选题]The cylinder cover is not provided with ().
A. fuel valve
B. lubricator
C. indicator valve
D. the starting valve
[单选题]The injector pump is operated by a cam which drives the () up and down.
A. piston
B. drum
C. plunger
D. barrel
[单选题]A thrust block is designed to().
A. absorb the shock of wave pressure at the bow
B. be placed between the engines and the foundation to absorb the vibration
C. transmit the thrust of the engine to the propeller
D. transmit the thrust of the propeller to the vessel
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