A dry-type spark arrestor removes sparks from a diesel engin

【名词&注释】

柴油机(diesel engine)、有利于(beneficial to)、进排气阀(inspiration exhaust valve)、救生艇筏、燃烧室部件(combustion chamber components)、全体人员(general staff)、新鲜空气(fresh air)、要注意(should be noticed)

[单选题]A dry-type spark arrestor removes sparks from a diesel engine exhaust by ____.

A. increasing the linear velocity of the exhaust gases
B. changing directions of exhaust gas flow
C. decreasing the temperature of the exhaust gases
D. accelerating the exhaust gas through a reduced size orifice

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举一反三：

[单选题]柴油机设置进排气阀重叠角的主要目的()

A. 有利于气缸内废气的排净
B. 可降低燃烧室部件的热负荷
C. A+B+D
D. 有利于新鲜空气^{(fresh air)}充分吸入

[单选题]在攀扶登乘梯进入救生艇筏时要注意^{(should be noticed)}( )。

A. 全体人员^{(general staff)}依次上梯，快速登乘
B. 有专人指挥，掌握次序，梯子上下有专人协助
C. 在登梯接近艇筏时可以直接跳人艇筏内

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