【名词&注释】
表面粗糙度、含氧量(oxygen content)、驾驶员(driver)、危险品(dangerous goods)、绝大多数(most)、严守纪律(maintain strict discipline)
[单选题]Crankcase explosions in propulsion diesel engines result from ____.
A. the splashing of lubrication oil by the crankshaft
B. the dilution of crankcase oil with particles of combustion
C. broken fuel lines spraying oil on the crankcase
D. the ignition of unburned fuel and air in the crankcase
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举一反三：
[单选题]装配
A. rig
B. repair
C. fit
D. mend
[单选题]When received the order "Finished With Engine", which of the following operations is wrong?
A. stop the L.O pump, S.W pump, jacket water cooling pump immediately
B. stop the F.O booster pump
C. engage the turning gear, turn the main engine
D. open the main engine scavenge air trunk's drain cocks
[单选题]实验表明，当燃烧区域中含氧量低于______时，绝大多数(most)燃烧自行熄灭。
A. 21%
B. 17%
C. 11%
D. 10%
[单选题]在液体动压润滑中影响形成油楔及其动压力的因素有( )Ⅰ.轴承负荷;Ⅱ.滑油黏度;Ⅲ，摩擦表面的运动速度;Ⅳ.轴承间隙;Ⅴ.总碱值;Ⅵ.摩擦表面粗糙度。
A. Ⅰ+Ⅱ+Ⅲ+Ⅳ+Ⅵ
B. Ⅱ+Ⅲ+Ⅳ+Ⅴ+Ⅵ
C. Ⅰ+Ⅲ+Ⅲ+Ⅳ+Ⅴ
D. Ⅰ+Ⅲ+Ⅳ+Ⅴ+Ⅵ
[单选题]在火场进行防护时，应做到以下几点：
A. 切断电源、油路
B. 隔离危险品
C. 冷却火场周围空间
D. 以上都是
[单选题]当弃船命令或信号发出后，全体船员和旅客都应：
A. 严守纪律(maintain strict discipline)
B. 惊慌混乱
C. 各自逃生
[单选题]按航向操舵，操舵水手接到驾驶员变换航向口令时，当航向变动的幅度()，航速，可操大舵角。
A. 小，快
B. 大，快
C. 大，慢
D. 小，慢
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