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单选题
螺旋桨静平衡试验的目的是（）。
A
消除热处理后的应力
B
消除不平衡的离心力
C
检查裂纹
D
校正螺距
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单选题Which statement about stopping a vessel is TRUE?（）A
A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from asternB
A vessel is dead in the water when the back wash from astern operation reaches the bowC
A tunnel bow thruster can be used in an emergency to reduce the stopping distanceD
When a vessel is dead in the water any speed displayed by doppler log reflects the current
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单选题Cargo handling unit is rated according to the （） to be lifted.A
cargo craneB
jibC
safe working loadD
oil pressure
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单选题Positive displacement, helical gear pumps are well suited for pumping oil because （）A
stuffing boxes eliminate the leakage problems usually associated with other gear pumpsB
it is not necessary to closely maintain design clearances with this pumpC
they are essentially self-priming and produce a high suction liftD
these pumps are designed with extreme tooth angled
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单选题理想变压器原边所加电压增加10%，同时电源频率保持不变，而变压器的原、副边绕组匝数各增加10%，则变压器的铁芯中主磁通会（）。A
增加10%B
减少10%C
增加20%D
基本不变
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单选题The control mode in which the final control element is moved from one of two flexed positions to the other is known as （）.A
dead band actionB
neutral zone actionC
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单选题A casualty report of an intentional grounding is required under what condition?（）.A
Under any conditionB
If the grounding lasts over 24 hoursC
If it creates a hazard to the environmentD
At the owner's discretion
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单选题Low compression pressure in a diesel engine may be the result of （）A
insufficient fuel supply due to fuel pump valves sticking or leakingB
excessive mechanical clearance between the piston crown and cylinder headC
excessively worn fuel pump plungerD
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问答题深圳长航所属“长意”轮机损事故
2005年6月19日03：00时“长意”轮（0513航次，韩国仁川—越南海防、胡志明）在韩国仁川装货完毕开航。6月21日16：20时该轮航行至台州湾时，机舱值班人员发现主机（型号为MAN10V52／55A）B3缸防爆导门弹开，并伴有油雾、烟气喷出，遂立即停车。后经轮机长检查，发现第3缸曲拐箱底部有金属碎沫，B3缸缸套、活塞严重拉缸；启动主机润滑油泵压油盘车检查，油压低于2kg/cm2，进一步检查发现靠飞轮端曲轴箱内笫一道主轴承上盖连接的润滑油管从法兰根部断裂。
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单选题Hydraulically, servo-operated, automatic, change over valves, utilized in a two ram hydraulic steering gear, serve to（）A
allow an alternate main pump to start in the fully loaded condition thus developing immediate full torqueB
prevent either main pump from being hydraulically motored when idle by cross pressure flowC
prevent both units from operating simultaneously which could result in doubling the flow of oil and pressure leading to over pressurization of the systemD
all of the above
考题
单选题By the stowage factor,when given a certain volume of space, we know（）.A
the space of the shipB
the space of one shipC
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考题
单选题At night，a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two（）.A
red lightsB
red lights and two white lightsC
red lights with a white light in betweenD
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单选题与其他主动式减摇装置相比，减摇鳍式减摇装置功率是（），具有很好的运行经济性。A
直接产生减摇力矩B
用于控制鳍角C
产生减摇力矩，直接控制鳍角D
用于减少横摇力矩
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