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单选题
一条锚链由哪几个链节组成？（）
A
锚端链节，末端锚节
B
锚端链节，中间链节
C
中间链节，末端链节
D
锚端链节，中间链节，末端链节
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单选题If you must make an electricity connection in a poorly accessible spot, solder it and seal it against （）A
metalB
woodC
waterD
plastic
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单选题A“chock” is a（）.A
deck fitting used to secure mooring linesB
casting fitted at the side of a weather deck，used as a fairleadC
sharp block of wood used to support hygroscopic cargoD
smoke pipe for the galley stove
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单选题Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.A
AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels，aircraft and shore stations within the areaB
AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels，aircraft and shore stations within the areaC
AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels，aircraft and shore stations within the areaD
AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels，aircraft and shore stations within the area
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单选题RLC串联交流电路，若调节电路的电频率，当发生谐振时，下列说法错误的是（）。A
XL＝XC，总阻抗｜Z｜＝R最小B
电源电压U＝URC
电流i＝U/R达最大值D
电源电压U＝UR+UL+UC
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单选题Diesel engine ‘blow-by’ into the crankcase is caused by excessive ring（）A
back clearanceB
side clearanceC
gap clearanceD
taper clearance
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单选题The amount of moisture in a given sample of air, when compared with the amount of moisture the air could hold if totally saturated at the existing temperature of the sample, is called （）.A
absolute humidityB
specific humidityC
effective humidityD
relative humidity
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单选题Oil product samples should be taken from the（）.A
dock riserB
ship's cargo tanksC
shore tank dischargeD
All of the above
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单选题船停车后的停船距离（冲程）的定义是船在前进中下令停止主机至：（）A
船对水停住移动时的对水滑行距离B
船对地停住移动时的对水滑行距离C
船对水停住移动时的对地滑行距离D
船对地停住移动时的对地滑行距离
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单选题船舶公司根据其船舶营运的需要，在经常有其船舶前往挂靠的港口，委托港口的船舶代理机构，在一定期限内，办理属于该公司的所有船舶的在港业务，称为（）。A
长期代理B
经常代理C
定期代理D
固定代理
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单选题（）is not installed on the main switchboard.A
Ammeter and changeover switchB
Power factor meterC
SynchroscopeD
Reverse sequence relay
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单选题电镀溶液是获得优质镀层和高生产率的关键，根据用途不同有（）。Ⅰ.打底电镀液；Ⅱ.电解液；Ⅲ.电净液；Ⅳ.活化液；Ⅴ.电刷镀液。A
Ⅰ＋Ⅱ＋Ⅲ＋ⅤB
Ⅰ＋Ⅲ＋Ⅳ＋ⅤC
Ⅲ＋Ⅳ＋ⅤD
Ⅱ＋Ⅲ＋Ⅴ
考题
单选题The phrase when built in the certificate of vessel’s nationality definitely means（）.A
when was your vessel builtB
at what time is your vessel buildingC
when is your vessel builtD
at what time you built your vessel
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