自考题库
首页
所有科目
自考历年真题
考试分类
关于本站
游客
账号设置
退出登录
注册
登录
出自:海船船员证
用千分表测气阀定时时,说法正确的是()。
A:千分表触头脱离弹簧盘时刻的飞轮刻度为开启提前角
B:千分表指针刚动时刻的飞轮刻度为开启提前角
C:弹簧盘重新接触千分表触头时刻的飞轮刻度为关闭延迟角
D:千分表指针指零时刻的飞轮刻度为关闭延迟角
锅炉安全阀的开启压力可调为()。
A:大于实际允许工作压力5%
B:大于实际允许工作压力10%,但不应超过设计压力
C:大于实际允许工作压力15%,但不应超过设计压力
D:等于设计压力
气压观测应在()
A:正点前15min进行
B:接近正点进行
C:正点前10min进行
D:正点前30min进行
三副负责在船上有关场所张贴的图表、标志有:()I、船舶应变部署表及船员应变任务卡;II、应急操舵动力转换示意图;III、救生衣穿着示意图;IV、船员日常防火守则
A:I~III
B:I~IV
C:I、III、IV
D:II、III、IV
单拖船协助低速前进中的大船向左回转时,为尽量减少大船左移距离,应:()
A:吊拖大船左舷船首
B:吊拖大船右舷船首
C:顶推大船左舷船尾
D:顶推大船右舷船尾
铸铁件的手工电弧焊常用的方法有()。
A:热焊法
B:半热焊法
C:冷焊法
D:A或B或C
为了防止电化学腐蚀可在零件表面覆盖保护膜,以使零件表面与介质隔开,常采用()等工艺。 1电镀, 2涂防锈油, 3喷涂, 4氮化, 5氧化。
A:1+2+3
B:1+2+5
C:1+3+5
D:1+2+3+4+5
在开阔洋面上,平直等压线水平气压梯度大小相等,若在较低纬度出现大风时,则()
A:在较高纬度海域一定无大风
B:在较高纬度海域一定有大风
C:在较高纬度海域可能有大风
D:在较高纬度海域风力不小于8级
External and internal leakage in hydraulic systems may be caused by ().
A:unusual vibration
B:excessive worn parts
C:abnormal pressure
D:any of the above
二副收到无线电航行警告应根据其内容用铅笔在海图上标注,并装订备查,保管期是:()
A:一个航次
B:一年
C:六个月
D:三个月
为了传递信息,CPU与存储器之间的连接需要()。
A:地址、数据、控制三组总线
B:只需一组总线,分时传送地址、数据和控制信息
C:需两组总线,数据和地址合用一组总线,分时传送数据和地址
D:需两组总线,数据和控制合用一组总线,分时传送数据和控制信息
能见度不良航行制度规定,当能见度小于()海里,并且能见度在进一步降低时,即认为能见度不良,船舶应处于航行戒备状态,并做好一切船舶在能见度不良水域中航行的准备,驾驶员应报告船长并通知机舱,开启雷达,将雷达调整到最佳工作状态并正确使用,注意守听VHF16/70频道和加强瞭望。
A:2
B:3
C:4
D:5
评价定值控制系统动态过程品质的参数有()。
A:超调量
B:振荡次数
C:过渡时间
D:放大系数
The ()belongs to the anchor handling equipment.
A:chain lifter
B:winch barrel
C:slewing rim
D:warping dru
The total leg load reactions on an independent leg,self-elevating unit include static and().
A:environmental loading
B:variable loading
C:fixed loading
D:basic loading
船舶在旋回过程中会出现降速的现象,这是因为().
A:船舶斜航时阻力增加;
B:舵阻力增加;
C:推进器效率降低;
D:以上都是。
一牢固组合体,在能见度不良水域中航行,应以不超过2分钟的间隔连续鸣放:().
A:两长声
B:一长声
C:一长两短声
D:一长三短声
()may be a warning for an approaching storm.
A:The persence of cirrus clouds
B:The low-hanging stratus clouds
C:The altocumulus clouds
D:The massive cumulus clouds
The purpose of the purge valve at the top of the condenser in a refrigerating system is to()
A:remove any air that may accumulate in the system
B:take out unpleasant fumes from the refrigerant
C:vent off excess refrigerant in an emergency
D:permit opening the refrigerating system for cleaning and inspecting
A vessel is equipped with two ships service generatorsGenerator #1 is rated at 900kw and generator #2 is rated at 600kw.During parallel operation, with a hotel load of 1000kw, what should be the kw load on generator #2 ().
A:100kw
B:400kw
C:500kw
D:600kw
According to the Chemical Data Guide,epichlorohydrin is a(n)().
A:corrosive
B:class B poison
C:oxidizer
D:explosive
The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is ()
A:higher than the first stage feed-water temperature and absolute shell pressure
B:lower than the first stage feed-water temperature and absolute shell pressure
C:the same as the first stage feed-water temperature and absolute shell pressure
D:not related to the feed-water temperature and absolute shell pressure
The mere inclusion of an arbitration clause in a bill of lading to which the Hague Rules apply as a matter of contract does not deprive the carrier()the one year time limit.
A:by
B:to
C:of
D:off
破冰船开路护航,其后船舶与破冰船的间距约为破冰船船长的:().
A:1~2倍
B:2~3倍
C:3~4倍
D:5倍左右
涂料在施工中易引起施工人员中毒的原因是()。
A:因涂料中含有对人体有害的苯、铅、胺类、甲醇,汞合汽油等成分
B:因施工人员在舱内工作时间过长,而且舱内通风条件极差
C:A、B都对
D:A、B都错
多孔喷油器与单孔喷油器比较,其主要优点是()。
A:孔径较大
B:油粒细,锥角大
C:油粒粗,锥角小
D:油束穿透力强
The safety management objectives of the ISM Code are ().
A:to provide for safe practices in ship operation and a safe working environment
B:to establish safeguards against all identified risks
C:to continuously improve safety management skills of personnel, including preparing for emergencies
D:all the above
空压机设液气分离器是分离()。
A:滑油
B:燃油
C:凝水
D:A和C
PLEASE BE ADVISED THE CAPTIONED VESSEL PROVISIONS SUPPLY HAS BEEN DULY ARRANGED AND SHIP CHANDLER WILL GO ON BOARD YR GOOD SHIP TO ATTEND TO THIS AFTER BERTHING. This telex says that ().
A:the provisions have been provided on board
B:the provisions will be delivered to you
C:the shipchandler will go on board your vessel for details
D:the provisions have not yet been arranged
工作正常的冷凝器,制冷剂在其中的整个换热过程应该是:()
A:没有相变的过程
B:始终相变的过程
C:前后不发生相变,中间是相变过程
D:前后发生相变,中间没有相变
首页
<上一页
1641
1642
1643
1644
1645
下一页>
尾页