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单选题
影响北大西洋的气旋主要来自()
A
北美和美国东部沿海
B
纽芬兰岛附近洋面
C
冰岛附近洋面
D
地中海
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单选题旋回运动中船舶产生横倾,作用在船体上的横倾力矩包括:().A
舵横向力矩,船体水动力横向力矩和旋回运动离心力矩B
舵横向力矩和旋回运动离心力矩C
舵横向力矩和船体水动力横向力矩D
船体水动力横向力矩和旋回运动离心力矩
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单选题You are handling a mooring line and are instructed to Check the line.What should you do().A
Ensure the bight is not fouled by taking up slackB
Pay out the line smartly and keep it free for runningC
Secure the line by adding more turnsD
Surge the line so it maintains a strain without parting
考题
单选题某船Δ=6987t,KG=5.83m,现将岸上总计重量为150t的货物悬挂在舱内距基线8.2m处,悬索长3m,则装货后船舶初稳性高度改变()m。A
0.11B
-0.11C
0.08D
-0.08
考题
单选题Opposition occurs when().A
the Sun,Earth,and Moon are at right anglesB
the Sun's declination is 0°and is moving southC
an inferior planet is at the maximum angle to the line of sight to the SunD
the Earth is between a planet and the Sun
考题
单选题采用方位避险,如所选避险物标和危险物同在航线左侧,且避险物标位于危险物前方,避险方位为060°,陀罗差2°W,则在下列哪种情况下表明船舶存在航行危险()。A
实测陀罗方位060°B
实测陀罗方位058°C
实测真方位062°D
以上都不存在危险
考题
单选题按照现行《海洋环境保护法》的规定,船舶进行下列哪项活动时应当事先报经有关部门批准?()I、冲洗有污染物的甲板;II、在港内舷外拷铲油漆;III、在港内使用焚烧炉;IV、港区内检修雷达A
I~IVB
I、II、IVC
II~IVD
I~III
考题
单选题The main causes of fire on board ships are ()A
oil leakage in engine-roomB
hot work (welding, cutting, etc)C
static electricityD
all of the above
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单选题Fighting a rig fire in a watertight compartment with hoses could reduce the stability of the rig by().A
progressive downfloodingB
reducing the level of drill water from the storage tanksC
causing a list due to the water in the compartmentD
reducing the KG to minimum allowable
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单选题规则波的波速与波长的关系是()A
波速与波长成正比,比例系数为1.25B
波速与波长成正比,比例系数为0.80C
波速与波长的平方根成正比,比例系数为1.25D
波速与波长的平方根成正比,比例系数为0.80
考题
单选题This arrangement is () if the elements are directly connected to one another and the control action takes place without human involvement.A
a manual closed loopB
a manual opened loopC
an automatic closed loopD
an automatic opened loop
考题
单选题A gate valve installed in a pipeline should be ().A
used in either the fully dosed or fully opened positionB
installed with the stem downC
used for steam service onlyD
used to throttle or regulate the flow of liquid
考题
单选题锅炉炉水化验含盐量偏高通常应进行()处理。A
下排污B
上排污C
投炉水处理药D
停炉换水
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