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出自:海船船员证
No navigational aids are shown and chart is not kept()for alterations in depths inside the pecked lines joining Hurst pt. to Warden pt.
A:accurate
B:correct
C:corrected
D:accuracy
Which of the following conditions can cause below normal air pressure in the intake manifold of a turbocharged diesel engine?()
A:Excessive piston blow-by to the manifold
B:Insufficient cooling water flow
C:Accumulated water in the air boxes
D:Clogged air intake filters
The drift and set of tidal,river,and ocean currents refer to the().
A:position and area of the current
B:speed and direction toward which the current flows
C:type and characteristic of the current's flow
D:None of the above
作为船舶主推进装置,在功率相同的情况下,重量最轻的是:()
A:蒸汽机
B:蒸汽轮机
C:燃气轮机
D:柴油机
A common class of wire rope is the 6X37 class.What does the 37 represent().
A:Number of wires in the inner core
B:Number of strands per wire rope
C:Tensile strength of the wire
D:Number of wires per strand
初次入级检验的范围不能按照()范围进行检验。
A:特别检验
B:坞内检验
C:循环检验
D:螺旋桨轴抽出检验
某轮顺流航行4h,实际航程为52nmile,0800计程仪读数:L1=50'.0,计程仪改正率ΔL=-7%,船速12kn,流速1kn,则1200相对计程仪读数L2为()。
A:105'.9
B:94'.8
C:101'.6
D:103'.2
The distress alert should()the ship in distress.
A:identity
B:identical
C:identify
D:identification
某轮装载后呈中拱状态且首倾,最好是()。
A:在中区加压载水
B:将首部压载水移至中区
C:在首区双层底加压载水
D:将中区压载水移至尾部
PGA液压调速器当转速设定气压信号达最大值而转速没达到要求值,正确的调节是:()。
A:向转速设定油缸方向移动复位杆的可调支点
B:向远离转速设定油缸方向移动复位杆的可调支点
C:向上移动复位杆的可调支点
D:向下移动复位杆的可调支点
木材甲板货的海运特性包括() ①积载因数较大 ②极易吸收和散失水分 ③建材、新伐材及某些树种木材有气味 ④木材表面衍生物的呼吸作用易放出有毒气体 ⑤木材表层材质的腐败会产生有毒和甲烷气体
A:①~⑤
B:除③
C:除④
D:除①
Concerning the incinerator’s operation, which of the following is not correct?()
A:Scavenging time should be more 30 seconds before igniting
B:The temperature of sludge tank is 80~100℃
C:First igniting the incinerator with diesel oil, when the temperature of health is about 600℃, the sludge oil drawn in
D:The ash can be dumped into sea when the distance is more than 3 miles from land
应力集中的大小可用()表示。
A:最大正应力
B:最大剪应力
C:应力集中系数
D:应力循环特征值
气动式主机遥控系统的主要特点包括()。 ①便于掌握管理 ②驱动功率小 ③传送距离远 ④结构简单 ⑤直观 ⑥工作可靠
A:主机滑油压力的监视与报警
B:主机转速的自动调节
C:主机冷却水温度的自动调节
D:燃油滤器的自动清洗
The stainless steel bars are painted by().
A:lot
B:lots
C:a lot
D:the lots
The scavenge port inspection should be carried out(), to obtain the most reliable result with regard to the effectiveness and sufficiency of the cylinder lubrication and the combustion cycle (complete or incomplete).
A:at the first stop after a long voyage egby anchoring if possible
B:at the first stop after arrival at harbor
C:at the first stop after low load running
D:at the first stop after passing river or canal passage
在与热带气旋配合使用时,[SW]表示()。
A:目前热带气旋中心附近最大风力已达到10~11级
B:预计24h内热带气旋中心附近最大风力可达到10~11级
C:目前或预计24h内热带气旋中心附近最大风力达到10~11级
D:热带气旋中心附近最大风力目前未达到10~11级,预计24h内可达到10~11级
平衡舵的特点是() ①舵叶压力中心靠近舵轴; ②所需的转舵力矩小; ③可相应减小所需的舵机功率; ④结构简单。
A:①、②、③;
B:①、③、④;
C:①~④;
D:②、③、④。
A towing vessel becomes tripped while towing on a hawser astern. What factor is MOST important when assessing the risk of capsizing? ()
A:Length of the towline
B:Height of the towline connection
C:Longitudinal position of the towline connection
D:Direction of opposing force
船长和船员对PSCO登轮检查应给与良好合作并注意()。 Ⅰ、基本的礼节 Ⅱ、仪表 Ⅲ、卫生环境
A:Ⅰ+Ⅱ
B:Ⅰ+Ⅲ
C:Ⅱ+Ⅲ
D:Ⅰ+Ⅱ+Ⅲ
车用汽油的牌号是按油品的()高低来分的。
A:粘度
B:凝点
C:闪点
D:辛烷值
何从人工舵转换为自动舵?
A faulty thermostatic bypass valve, in a diesel engine cooling system, can result in ()
A:excessive time required for warming-up
B:excessive freshwater corrosion
C:scale formation on the saltwater side
D:saltwater mixing with the freshwater
国际海事劳工公约简称()
A:MLC2006
B:SOLAS74
C:STCW78/95
D:MARPOL73/78
在人落水警报信号之后一短声表示左舷落水,二短声表示右舷落水。
中华人民共和国()主管全国的船舶签证管理工作。
A:海事局
B:海洋局
C:船籍港
D:海关
按照要求,每艘救生艇筏的存放应使()名船员在()分钟内完成降落和登乘的准备工作。
A:2/10
B:3/10
C:2/5
D:3/5
Head tank should be used to remove () from cooling water.
A:scale
B:sludge
C:chemicals
D:air
额定容量为50kVA,原副边额定电压分别380V/220V的单相变压器,它的原副边额定电流是()。
A:131.6A/187.3A
B:158.7A/227.3A
C:131.6A/227.3A
D:158.7A/187.3A
However, where immediate action is necessary to ensure safety of the ship, its machinery and crew, it must be taken by the engineer in chargeWhat dose “it” mean in the sentence above?()
A:safety
B:the ship, its machinery and crew
C:immediate action
D:the engineer in charge
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