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单选题
()应了解操作性或事故性的海洋环境污染的严重后果,并应采取一切可能的预防措施防止这类污染,特别是有关国际规则和港口规章规定范围内的污染。 ①船长; ②高级船员; ③普通船员
A
①②
B
②③
C
①③
D
①②③
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单选题An emergency diesel generator should automatically shut down in the event of ()A
dangerous over-speedingB
a loss of lube oil pressureC
activation of the fixed CO2 system for the emergency generator spaceD
all of the above
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单选题某轮相对计程仪改正率ΔL=0%,L1=110'.5,船速16kn,顺风顺流航行,流速3kn,风使船增速1.5kn,2h后计程仪读数L2为()。A
145'.5B
151'.5C
148'.5D
142'.5
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单选题Preferred channel marks are colored with().A
black and green bandsB
red and green bandsC
red and yellow bandsD
yellow and green bands
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flow of petroleum through pipesB
spraying or splashing of petroleumC
settling of solids or water in petroleumD
All of the above
考题
单选题关于保持正规的了望,下列说法哪个正确()?A
只要能发现碰撞危险,就意味着保持的了望是正规的B
保持正规的了望,就意味着在任何时候,每一船舶应采取适合当时环境和情况下一切有效的手段保持系统的观察C
只要船舶使用视觉进行不间断的观察,即可认为保持着正规的了望D
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考题
单选题一台额定电压为220V/110V的单相变压器,副边接电阻为10Ω的负载,则从原边看其等效电阻为()Ω,原边接220V的电源,原边电流是()A,副边电流是()A。A
40/5.5/11B
8/6.9/13.75C
16/6.9/13.75D
32/27.5/13.75
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单选题When joining the female coupling of the fire hose to the male outlet of the hydrant,you should make sure that the().A
threads are lubricatedB
nozzle is attached to the hoseC
female coupling has a gasketD
hose is led out
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单选题以R22为工质的热泵循环,工质在压缩机进口为饱和蒸气状态(h1=397.5kJ/kg),同压力下饱和液体的焓值为h5=168.3kJ/kg。若工质在压缩机出口处h2=433kJ/kg,在绝热节流阀进口处h3=224.1kJ/kg,则该热泵循环的供热系数为()。A
3.88B
4.88C
5.88D
6.46
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单选题() is the control of temperature and humidity in a space together with the circulation, filtering and refreshing of the air.A
RefrigerationB
Air conditioningC
VentilationD
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单选题You are making a telephone call ship-to-shore using the VHF-FM service.You can tell that the working channel is busy if you hear().A
SpeechB
Signaling tonesC
A busy signalD
All of the above
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Ⅰ+ⅡB
Ⅰ+ⅢC
Ⅱ+ⅢD
Ⅰ+Ⅱ+Ⅲ
考题
单选题Intact buoyancy is a term used to describe().A
the volume of all intact spaces above the waterlineB
an intact space below the surface of a flooded areaC
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low firing pressureC
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mechanical knock in each cylinder
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环境干扰B
由于心胸狭窄和偏见听不进C
理解力地下,听不懂D
发送的信息不清楚
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