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单选题
往复泵阀箱被吸入阀和排出阀分隔为三层，泵缸通（）。
A
上层
B
中层
C
下层
D
A或B或C
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单选题Which of the following condition is likely to develop if the thermocouple element of a pyrometer becomes coated with excessive amounts of combustion by-products?（）A
Indicated exhaust pressure readings will increaseB
Pyrometer responses will be retardedC
Indicated cylinder temperature readings will increaseD
Indicated firing pressure readings will increase
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单选题在为多台电动机设计顺序起动控制线路时，常由先起动的电机接触器的常开触点控制一时间继电器，起动其延时；而时间继电器的常开延时闭触点串入下一个待起动电机的接触器线圈回路中。此控制环节称之为（）。A
自锁控制B
互锁控制C
连锁控制D
自保控制
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exhaust and suction processB
suction and compression processC
combustion and exhaust processD
working and exhaust process
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单选题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）A
Exhaust temperaturesB
Raw water pressureC
Lube oil pressureD
Air box pressure
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单选题下列（）情况时驾驶台应提前通知机舱准备。 Ⅰ船舶进出港口，通过狭水道、浅滩、危险水域或抛锚等需备车航行时； Ⅱ遇雾或暴雨等突发情况时； Ⅲ等引航员、候潮、等泊等原因须短时间抛锚时； Ⅳ因机械故障不能执行航行命令时。A
Ⅰ～ⅣB
Ⅰ+Ⅱ+ⅣC
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Ⅰ+Ⅲ
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I~IIIB
I~IVC
I、II、IVD
II~IV
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机动船从事拖带，拖带长度小于200米B
机动船从事拖带，拖带长度大于200米C
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单选题Each cylinder liner on the marine medium speed engines （）.A
is usually cooled by sea waterB
can be replaced when worn outC
is in direct contact with the water in the bore of the cylinderD
can t expand when heated
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单选题Lubricating oil used in a diesel engine serves to（）A
reduce the wear of bearing surfacesB
cool the bearing surfacesC
assist in sealing bearing surfacesD
all of the above
考题
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受载期是指船舶预期到达装货港或地点，并做好装货准备的日期B
解约日是指船舶抵达合同约定或承租人选定的装货港并做好装货准备的最后期限C
如果船舶未能在受载期之前抵达装货港并做好装货准备，承租人有权解除合同D
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Cracked cylinder linerD
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deviationB
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单选题Official draft measurements should be（）by authorized persons，agreed by both parties involved.A
executedB
locatedC
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