【名词&注释】
热应力(thermal stress)、严守纪律(maintain strict discipline)、锅炉水位计
[单选题]Which of the following represents the significance the fuel oil cetane number?
A. The cetane number has no affect on injection lag
B. The cetane number is an indication of the fuel's viscosity
C. Ignition lag is reduced with fuels having a high cetane number
D. The cetane number is of little significance in the combustion process
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举一反三：
[单选题]锅炉水位计中水位始终静止不动，说明_________堵塞。
A. 通水管路
B. 通汽管路
C. A或B
D. A和B
[单选题]活塞头部触火面裂纹主要是由_______引起的
A. 热应力
B. 机械应力
C. 应力集中
D. 过热
[单选题]For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by
A. moving the governor control to stop
B. shutting off the lubricating oil supply
C. tripping the governor emergency stop lever
D. shutting off the fuel supply
[单选题]柴油机内作功的工质是()
A. 空气
B. 燃油
C. 氧气
D. 燃气
[单选题]当弃船命令或信号发出后，全体船员和旅客不应：
A. 严守纪律
B. 服从指挥
C. 惊慌混乱
[单选题]平桨时，桨叶应与艇缘同高，并与水面（）
A. 垂直
B. 平行
C. 随意
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