出自:海船船员证

在改变主起动阀开度的慢转起动回路中,慢转指令形成后,起动控制阀和慢转电磁阀控制端信号分别应是()。
A:00
B:01
C:10
D:11
The boat is stowed on the davit rather than on a cradle with which type of davit?()
A:Crescent
B:Sheath-screw boom
C:Quadrantal
D:Radial
双杆作业中应注意避免:() ①、“超关”;②、“急顿”;③、“游关”;④、“摔关”
A:①、②
B:①、②、③
C:②、③、④
D:①、②、③、④
滚装船的首门一般设于:()
A:干舷甲板之下
B:干舷甲板之上
C:平台甲板以上
D:二层甲板以上
利用万用表测量小功率可控硅,测量方法是:万用表选择R×1K档,并将可控硅其中一个电极假定为G极,接黑表笔,然后,用红表笔分别接触余下的两个极。若有一次出现导通,则假定的控制极G是对的,而导通那次红表笔所接触的是(),余下的另一极为()。
A:阳极K;基极A
B:阳极K;阴极A
C:基极K;阳极A
D:阴极K;阳极A
根据当前的技术水平在对柴油机排气有害成分的净化措施中其总特点是()。
A:净化措施降低柴油机经济性
B:净化措施可同时提高柴油机经济性
C:净化措施可保持原经济性不变
D:随机型不同而异
Topside icing that blocks freeing ports and scuppers().
A:is usually below the center of gravity and has little effecton stability
B:will cause water on deck to pocket and increase stability
C:may decrease stability by increasing free surface effect due to water on deck
D:increases the effective freeboard and increases thewind-heel affect
根据风向的变化,可以确定本船在台风路径中的位置,在南半球,下述正确的是:()
A:风向左转船在可航半圆
B:风向右转船在危险半圆
C:风向左转在左半圆
D:风向左转在右半圆
在Hagenuk电/液伺服器中,力线圈的工作电流是4~20mA,若力线圈输入电流为20mA,而主机转速为额定转速的90%,这说明()。
A:伺服器量程小了
B:伺服器的量程大了
C:伺服器零点高了
D:伺服器的零点低了
舭肘板(又称污水沟三角形)的结构特点是() Ⅰ.其宽度与高度相同; Ⅱ.其厚度与实肋板相同; Ⅲ.其上面板或折边的宽度一般为其厚度的10倍。
A:Ⅰ,Ⅱ,Ⅲ
B:Ⅰ,Ⅱ
C:Ⅰ,Ⅲ
D:Ⅱ,Ⅲ
风浪是指()。
A:风区内的风直接吹刮海面引起的海面波动
B:风浪离开风区传至远处的波浪或风区里风停息后遗留下来的波浪
C:风浪或涌浪传至浅水或近岸区域后,因受地形影响将发生一系列变化的波浪
D:因强热带风暴、台风、寒潮等强风暴影响引起的海面异常升高的现象
The International Regulations for Preventing Collisions at Sea()while carrying out search and rescue operation.
A:apply fully
B:apply half
C:apply in part
D:not apply
磁北(NM)偏离真北(NT)的角度称为()
A:磁差
B:自差
C:罗经差
D:陀罗差
When using a buoy as an aid to navigation which of the following should be considered?()
A:The buoy should be considered to always be in the charted location
B:If the light is flashing,the buoy should be considered to be in the charted location
C:The buoy may not be in the charted position
D:The buoy should be considered to be in the charted position if it has been freshly painted
船舶航行中,事前充分的准备工作是安全拖带的前提;这些准备工作包括()。 ①拖缆的准备; ②拖缆的传递; ③系结和确定合适的拖航速度
A:①③
B:①②
C:②③
D:①②③
Which of the following statements is TRUE regarding automatic identification systems (AIS) ?()
A:AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications
B:AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only
C:AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone
D:AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals
船舶在使用定线制时应考虑:() Ⅰ、船舶的富裕水深Ⅱ、海图上标注的水深Ⅲ、海图测深的精度和水深变迁的可能性
A:Ⅰ
B:Ⅰ、Ⅱ
C:Ⅱ、Ⅲ
D:Ⅰ、Ⅱ、Ⅲ
测量螺旋桨桨叶上的螺距时,依螺距规水平杆的转角α和量杆的升程ΔL可计算出()。
A:局部螺距
B:截面螺距
C:桨叶螺距
D:总平均螺距
活塞式压缩机多变压缩时的耗功()定温压缩时的耗功。
A:大于
B:等于
C:小于
D:无法确定
三物标方位定位,当三物标位于同一侧时,实际船位应在由罗经差的误差引起的船位误差三角形()。
A:之内,内切圆的圆心
B:之外,旁切圆的圆心
C:之外,中标方位线的外侧
D:B+C
船舶确定搜寻基点时应考虑的因素()。 ①通报遇险的时间和船位; ②各救助船到达遇险船船位的时间; ③救助船到达之前的时间内,遇险船、其艇筏的漂移量; ④救助船驶抵现场前,已飞达现场的搜救飞机所作的情况估计; ⑤遇难船舶的漂移速度可由风压漂移和流压漂移的合速度进行估算,漂移方向为漂移速度的矢量方向
A:①②③④⑤
B:①②④⑤
C:②③④⑤
D:①②③
入级船舶依规范应定期进行尾轴润滑油检验,规定润滑油取样检验间隔期应不超过()
A:3个月
B:4个月
C:5个月
D:6个月
Freeboard is measured from the upper edge of the().
A:bulkwark
B:deck line
C:gunwale bar
D:sheer strake
A group of crew members standing by in case of an emergency in order to assist other teams in action if necessary is a().
A:Fire team
B:Rescue team
C:Emergency team
D:Control team
在磷酸盐炉水处理法中,()是可以迅速提高碱度的良好去垢剂。
A:磷酸二钠
B:磷酸三钠
C:亚硫酸钠
D:丹宁
There are 65()of grade No.3 rubber short.
A:bags
B:bales
C:sacks
D:cases
根据《驾驶、轮机联系制度》,下列哪些叙述正确()。 Ⅰ.船长应提前24小时将预计开航时间通知轮机长; Ⅱ.航行中如遇突发情况,值班轮机员接到通知后应立即备妥主机; Ⅲ.抵港后船长应将本船预计动态告知轮机长以便安排工作; Ⅳ.主机冲车前,值班驾驶员应征得值班轮机员的同意。
A:Ⅰ~Ⅲ
B:Ⅰ、Ⅱ、Ⅳ
C:Ⅱ~Ⅳ
D:Ⅰ~Ⅳ
The lower end of each piston rod is reduced in diameter to fit a bore in the cross-head, this being secured to the piston rod by ().
A:a bolt
B:a cap
C:a disc
D:a nut
气阀启闭时刻的动作规律直接是由()控制。
A:气阀机构
B:气阀传动机构
C:凸轮
D:凸轮轴传动机构
Beams are cambered to().
A:increase their strength
B:provide drainage from the decks
C:relieve deck stress
D:All of the above