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船舶保安员系指由公司指定的承担船舶保安责任的船上人员，此人对（）负责。
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单选题关于规则附录四1款规定的信号，下列说法不正确的是：（） Ⅰ、只有以一定周期重复使用时，才表示遇险需要救助 Ⅱ、除为表示遇险需要救助和演习时，禁止使用或显示 Ⅲ、除为表示遇险需要救助和演习时，禁止使用或显示可能与规则附录四1款规定的信号相混淆的其他信号A
Ⅰ、Ⅱ、ⅢB
Ⅱ、ⅢC
Ⅰ、ⅡD
Ⅲ
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单选题A vessel approaching a narrow channel shall（）.A
avoid crossing the channel if it impedes another vessel navigating in the channelB
not overtake any vessels within the channelC
keep as close as possible to the edge of the channel on her port sideD
anchor only in the middle of the channel
考题
单选题某船在海水中的排水量Δ=10000吨，吃水为8米，TPC=25吨/厘米，现该轮从标准海水区域驶入标准淡水区域中，则船舶吃水变为（）米。A
8.10B
8.13C
8.15D
8.18
考题
单选题对舷侧为横骨架式的首、尾尖舱应设置的强胸横梁垂向间距分别为（）A
不大于2m；不大于2.5mB
不大于2m；不大于2mC
不大于2.5m；不大于2.5mD
不大于2.5m；不大于2m
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单选题Crankcase sweating in a refrigeration system is caused by （）.A
a stuck solenoid valveB
a shortage of refrigerantC
too much oil in circulationD
too much superheat
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单选题On the forecastle deck,the chief officer and the bosun（）sharp lookout.A
to keepB
are keepC
is keepingD
are keeping
考题
单选题In which of the listed refrigeration system components does superheating of the refrigerant take place?（）A
Expansion valveB
EvaporatorC
DrierD
Receiver
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单选题A set of interior steps on a ship leading up to a deck from below is known as（）.A
a companion wayB
tween-decksC
stairsD
Any of the above are acceptable
考题
单选题起重机构的阀控型开式液压系统采用液压缸作执行元件时，（）的管路在升、降、停时皆承受高压。A
液压泵排出管至换向阀B
换向阀至液压缸的起升进油口C
换向阀至液压缸的起升出油口D
液压缸至限速元件
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单选题A 200-meter vessel restricted in her ability to maneuver，at anchor，will sound a fog signal of（）.A
a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minuteB
one prolonged followed by two short blasts every 2 minutesC
one prolonged followed by three short blasts every minuteD
one prolonged followed by three short blasts every 2 minutes
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单选题The Consignee will take it for（）that the shortage is true.A
grantB
grantingC
grantedD
grants
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单选题根据SOLAS公约的要求，船上的应急电源在下列哪些条件下能向规定的处所全额、定功率供电（）。 Ⅰ．船舶破舱数不大于三舱； Ⅱ．横倾达22.5°时； Ⅳ．船舶正浮时； Ⅴ．纵倾达10°时。A
Ⅰ、Ⅱ、Ⅳ、ⅤB
Ⅰ、Ⅳ、ⅤC
Ⅱ、Ⅳ、ⅤD
Ⅱ、Ⅳ
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单选题What’s the advantage when using the satellites?（）A
The message can be directed to the desired locationB
The message can follow the earth’s curvatureC
The quality of message can not be affected by climaticD
The range of the message extend and the quality of reception is improved
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