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判断题
正确选择膨胀阀的尺寸和调节其过热度,可得到较合理的蒸发压力和温度。
A
对
B
错
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考题
单选题在交流船舶电站的控制屏面板上,设有原动机的调速手柄。标有“快”(或“正转”)及“慢”(或“反转”)两个方向。意思是当手柄向“快”方向操作时,()。A
调速器的弹簧预紧力增加,油门开度增大B
调速器的弹簧预紧力增加,油门开度减小C
调速器的弹簧预紧力减小,油门开度增大D
调速器的弹簧预紧力减小,油门开度减小
考题
单选题What benefit is a weather bulletin to a mariner().A
It provides a legal reason to cancel a projected voyageB
It allows the mariner to make long term weather forecastsC
It is of little benefit since the weather changes frequently and rapidlyD
It gives the mariner time to prepare for weather changes
考题
单选题海图上,潮流图式上只给出一个数字表示(),给出两个数字其中较小的表示(),标注小潮日流速时,则平均流速为()。()A
大潮日最大流速;其他日平均流速;3/4小潮日流速B
大潮日最大流速;小潮日最大流速;3/2小潮日流速C
小潮日最大流速;大潮日最大流速;3/4小潮日流速D
大潮日最大流速;大潮日最大流速;1/3小潮日流速
考题
单选题Which should NOT be a treatment for a person who has received a head injury and is groggy or unconscious?()A
Give a stimulantB
Elevate his headC
Stop severe bleedingD
Treat for shock
考题
单选题关于船舶的附加质量和附加惯性矩的大小,下述正确的是:()A
随着水深的变浅,附加质量增大,附加惯性矩减小B
随着水深的变浅,附加质量减小,附加惯性矩减小C
随着水深的变浅,附加质量减小,附加惯性矩增大D
随着水深的变浅,附加质量增大,附加惯性矩增大
考题
单选题船舶旋回运动中,漂角越大:().A
速降系数越小,速度下降越小,转心前移B
速降系数越小,速度下降越大,转心前移C
速降系数越大,速度下降越大,转心前移D
速降系数越小,速度下降越大,转心后移
考题
单选题Black smoke coming from a boiler can be caused by ().A
low water levelB
high water levelC
excessively high fuel pressureD
low oil temperature
考题
单选题At the earliest indication of fire aboard your vessel, you must FIRST().A
locate the fireB
determine which type of fire is burningC
sound the alarmD
fight the fire
考题
单选题船舶发生火灾或爆炸后,应立即采取的措施有()。 ①立即发出消防警报,通报全船并立即进入应急消防部署; ②迅速了解火源的地点、火势及其来源;③根据火源地点,按风的相对方向适当地操纵船舶,使火源处于下风A
①②B
①②③C
②③D
①③
考题
单选题If a diesel engine runs out of fuel, you can expect trouble from ()A
overheated injection pumpsB
water condensation in the cylindersC
fuel dilution of the lube oilD
air in the fuel system
考题
单选题电子示功器,它是利用电子技术,通过各种传感器把柴油机()等非电量按一定比例转化成相应的电量输出,经放大等中间环节送到记录显示装置进行观察或打印。A
气缸内的压力和温度B
气缸内的压力和曲轴转角C
气缸内的压力D
气缸内的压力和油雾浓度
考题
单选题The type of joint formed when an edge of one plate is laid over the edge of the plate to which it is riveted is a().A
grip jointB
strap jointC
thread jointD
lap joint
考题
单选题It may be found that,in certain circumstances,radar beacon emissions can cause()with the normal radar display,particularly at close range.A
unwanted interferenceB
unexpected figuresC
abnormal dataD
unwanted information
考题
单选题影响滑油氧化速度的主要因素是(),滑油氧化的危害()。Ⅰ、温度Ⅱ、杂质Ⅲ、导致滑油酸值增加Ⅳ、生成的胶质和沥青状沉淀物使油色变深,粘度增加Ⅴ、沉淀物附着在活塞表面上形成漆膜Ⅵ、沉淀物堵塞油路和滤器A
Ⅰ/Ⅳ~ⅥB
Ⅰ+Ⅱ/Ⅲ~ⅥC
Ⅱ/Ⅲ~ⅤD
Ⅰ+Ⅱ/Ⅲ+Ⅳ
考题
单选题请问当碰撞已不可避免时,船舶应:()A
继续根据避碰规则关于避让行动的要求采取措施,尽最后的努力避免碰撞B
根据良好船艺的要求采取最有效的行动以减小碰撞的损失C
将船尾转向他船D
采取使本船损失最小的措施
考题
单选题If more than one raft is manned after the vessel has sunk,you should().A
Go in a different direction in search of landB
Spread out to increase the possibility of a search aircraft finding youC
Reduce the number of rafts by getting as many people as possible into as few rafts as possibleD
Tie the rafts together and try to stay in a single group
考题
单选题The purpose of compressing the air within the cylinder of a diesel engine is to ()A
produce the heat for ignitionB
decrease injection lagC
increase ignition delayD
aid in exhausting burnt gases
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