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57吊艇机的()根吊艇索分别盘绕在吊艇机的滚筒上,排列整齐,不

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  • 【名词&注释】

    加热盘管(heating coil)、制冷压缩机(refrigeration compressor)、曲轴箱(crankcase)、表面温度(surface temperature)、海事局(marine administration)、主管机关(competent authorities)、在国外(in overseas)、使领馆(embassies and consulates)、书面报告(written report)

  • [单选题]57吊艇机的()根吊艇索分别盘绕在吊艇机的滚筒上,排列整齐,不多于()层。

  • A. 2,2
    B. 3,3
    C. 4,3

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  • [单选题]第一组An automatic system usually consists of a control system and an information system. A control system is a system which measures the condition of some entity and, with the information, governs the state of a variable; i.e., speed, temperature, pressure, position, etc. The open-loop system is the simplest form. a control system may assume. It is distinguished from the closed-loop system by the lack of an input which measures the state of the controlled variable; such an input is called a feedback. In modern ships the open-loop system has practically disappeared and the closed-loop system which operates with a feed-back is extensively used. An information system serves the parallel function of monitoring system or plant performance. The monitoring function may serve a number of purposes; specifically it may indicate values of controlled variables to guide remote control operations, warn of off-limit conditions and provide record of performance. In many cases a visual and audible alarm may be provided to warn of off-limit conditions on board ship and, associated with this, the important variables will be recorded on demand. The automatic control system can be more sophisticated by incorporating digital-processing equipment, that is, a computer. This computer is usually fed with signals from all sensors. It scans the values of the sensors and generates alarm signals for off-limit conditions, acting as a super-supervisor. Sometimes, it can even make necessary and take the necessary action to optimize performance without human intervention.
  • A. The closed-loop system differs from the open-loop system by
    B. the lack of a feedback
    C. the presence of a feed back
    D. the lack of a computer
    E. the presence of a computer

  • [单选题]使用艇罗经时,其南北线与艇龙骨线_______。
  • A. 垂直
    B. 平行
    C. 45度角
    D. 60度角

  • [单选题]对用于特定液货的加热介质应经()认可。应对加热盘管或导管的表面温度给予考虑,以避免货物局部过热或过冷而引起危险反应。
  • A. 当地海事局
    B. 主管机关
    C. PSC

  • [单选题]经( )为制冷压缩机加滑油必须停车。
  • A. 滑油泵吸口加油接头
    B. 曲轴箱加油阀
    C. 曲轴箱加油螺塞
    D. 所有以上方式

  • [单选题]海员在国内遗失海员证,需报告,由所在单位或派出单位向_报告并申请补发;在国外(in overseas)遗失,应由所在船船长持书面报告(written report)向_申请补发。
  • A. 到达港港监,我国住外使领馆(embassies and consulates)
    B. 原发证港监,我国住外使领馆(embassies and consulates)
    C. 到达港港监,公司住外机构
    D. 原发证港监,公司住外机构

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