招聘考试题判断搜题神器推荐-凯时尊龙登录入口

菜椒学霸网

    招聘考试题判断搜题神器推荐


    变压器差动保护的差动元件通常采用比率制动特性,内部故障时,制动量()。

    在使用跌落式熔断器时,应按照额定电压、额定电流和()选择。

    利用变压器励磁涌流中波形间断、短路电流连续的特征,通常采用()构成变压器差动保护。

    电力系统发生相间短路时的主要特征是()。

    变压器低电压起动的过电流保护的电压元件接在降压变压器低压侧母线电压互感器二次侧线电压上,反应三相线电压()时动作。

    在电力系统中无功功率必须留有足够的运行备用容量,在可能发生电压崩溃的负荷中心区域,采用按()降低自动减负荷装置。

    电动机负序电流保护,当()时自动解除闭锁(i2负序电流,i1正序电流)。

    电力系统发生的接地故障,包括()和两相接地故障。

    对于容量在()并列运行变压器或企业中的重要变压器应装设纵差动保护。

    变压器电流速断保护动作电流按躲过变压器负荷侧母线短路时流过保护的最大短路电流,并躲过()整定。

    电动机单相接地故障电流为10a及以上时,保护将()。

    变压器瓦斯保护接线中切换片xb有两个位置,即试验位置和()。

    距离保护装置反应()而动作。

    变压器油箱内故障包括绕组间的相间短路、绕组与铁芯之间的接地故障及()等。

    一般把继电保护动作值、动作时间的计算和()称为继电保护的整定计算。

    限时电流速断保护灵敏度校验条件为以本线路两相短路时,流过保护的()进行校验。

    电动机运行中由过热保护跳闸时()。

    造成变压器差动保护不平衡电流的因素有()、两侧电流互感器二次阻抗不完全匹配、变压器分接头调整等。

    根据现场设备的分散地点分别安装现场单元,现场单元可以是微机保护和监控功能二合一的装置,也可以是微机保护和监控部分各自独立的方式称为()变电站自动化系统。

    ()将汇编语言源文件转变为基于公用目标文件格式的机器语言目标文件。

    tms320c54x的并行乘法器与()位专用加法器相连,可以在单周期内完成一次乘法/累加运算

    下列tms320c54x的中断,不是可屏蔽中断的是()。

    对“mvkd data,*ar5”此条指令的正确理解是()。

    在tms320c54x的存储器系统中,不包括()部分。

    ()是指编译器用内联代码来取代函数调用,节省与函数调用有关的开销,并增加所有其他优化的机会。

    tms320c54x dsp共有129条指令,分为()大类。

    指令执行前ac0的值是0012345678,那么汇编语句“and0 #x7f,ac0”,执行之后,ac0的值是()。

    tms320c54x dsp汇编指令的操作数域中,()前缀表示的操作数为间接数寻址的地址。

    dsp选择的最重要因素是应用方案的()需求。

    tms320c54x dsp的32个中断源分为1,其中()级别最高。

    把立即数80h装入累加器a指令是()。

    dsp芯片采用了流水线的工作方式。()

    dsp的()是ti或ti的第三方为tms320dsp的使用者设计和生产的一种评估平台。

    实时操作系统rtos的任务有四种状态()。

    dsp处理器是专门设计用来进行()数字信号处理的微处理器。

    在dsp中,ccs的初始化配置文件是()。

    c54x系列dsp到帧形成器的物理连接的外部开销并不大,发送和接收都需要三条线,分别是()。

    在ip电话系统中,dsp的作用是将连续的语音流转换成适于在以()为基础的网络上可靠传输的形式。

    已知质点的位矢随时间的变化关系为 其中为时间,则质点在xy平面内的运动轨迹是__________。(采用国际单位制,时间单位:秒,长度单位:米)

    在“弹打落猴”实验中,猴子看到弹丸是作__________。

    如果一个物体被选为参考系,则在这个参考系中,这个物体是静止的。

    质点走过的距离,叫做路程,关于位移和路程,以下说确的是:

    已知质点做匀速率圆周运动,运动方程为,圆周运动的半径是__________。(采用国际单位制,长度单位:米,时间单位:秒)

    已知质点做匀速率圆周运动,运动方程为,圆周运动的周期是__________。(采用国际单位制,长度单位:米,时间单位:秒)

    已知质点做匀速率圆周运动,运动方程为,圆周运动的速度大小是__________ 米/秒(采用国际单位制,长度单位:米,时间单位:秒)

    对地心说集大成者是__________。

    哥白尼的日心说包含以下内容__________。

    某行星沿椭圆轨道运行,远日点离太阳的距离为a,近日点离太阳的距离为b, 过远日点时行星的速率为,则过近日点时的速率为______。

    一颗小行星绕太阳做匀速圆周运动的半径是地球公转半径的3倍,则这颗小行星运转的周期是__________年。(精确到小数点后面2位)

    伽利略被誉为近代物理之父是因为他__________。

    伽利略是首位用实验的方法研究物体运动规律的科学家,他通过调节斜面的倾角得出小球滚落速度与倾角关系的方法是__________

    能环绕地球在最低的圆形轨道上运行的速度称为第一宇宙速度。现有一航天器,在离地距离是地球半径的4倍处绕地球做匀速圆周运动,其速度大小是第一宇宙速度的__________倍。

    牛顿认为由于__________,故行星运动满足开普勒第二定律。

    牛顿提出一个思想实验的证明绝对空间存在,这个实验是__________。

    关于动量守恒定律,以下描述不正确的是__________。

    一质量为10kg的小球从0.8m高处自由下落到一厚软垫上,小球从接触软垫到小球静止经历了0.2s,这段时间内软垫对小球的平均作用力是__________n。 (取,不计空气阻力)

    无穷远处设为引力势能的零势能处,则卫星在地球引力场中的势能为__________。( m为地球质量,m为卫星质量)

    功和能的演绎过程中,我们得到了三个规律:机械能守恒定律,动能定理,功能原理。根据逻辑推演过程的因果排序为__________。

    关于动能正确的描述是__________。

    引导、控制雷电的设备叫——

    第一个得出点电荷相互作用力关系的科学家是

    电荷量和符号都相同的三个点电q放在等边三角形的顶点上。为了不使它们由于斥力的作用而散开,可在三角形的中心放一符号相反的点电荷 q',则q'的电荷量应为——

    点电荷周围存在电场,电场用电力线来描述是哪位科学家的思想

    点电荷的电场强度的大小具有球对称性

    欧姆定律的微分形式表征的是电流密度与电场强度的关系,而欧姆定律的积分形式表征的是电流强度与电压的关系,推理得出电压与电场强度是_____(积分、微分)关系。

    沿x轴放置的长直导线通有x轴正方向的电流。这个电流在y轴负方向上的p点所产生的磁场方向为()

    关于螺线管中的磁场,以下说确的是

    圆环电流产生的磁场在其中心点的磁感应强度大小与圆环的面积成正比,与环的半径成反比。

    静止电荷不受到磁场力,运动电荷一定受到磁场力。

    两条平行电流,通以同方向的电流,会相互排斥。

    以下说确的是

    从理论上预言光是一种电磁波的科学家是__________。

    对于电磁波,磁场达到最大值时,电场( )

    天线既可以发射电磁波,也可以接受电磁波。

    太阳光进入三棱镜后会发生__________现象。

    惠更斯的波动说不能解释光的直线传播。

    牛顿的微粒说能够正确解释光的折射定律。

    线偏振光在糖溶液中传播时,偏振化方向会发生偏转。

    可见光的波长范围是__________纳米。

    表达式表示的是沿x轴正方向传播的波。

    光子是一颗一颗的粒子。

    一个长度为的弦上,两端点固定,形成的驻波波长为__________。

    驻波是会传播的。

    仅波源运动时会产生多普勒效应。

    宇宙大爆炸理论预言,我们所处的宇宙现在还有3k左右的温度。

    氯气和水反应得到hclo浓度很低, 加入过量哪种物质不能提高hclo浓度?

    下列离子中含s-s单键的是

    分子中含 (p-d)π键的是

    下列盐中,热分解产物之一为金属氧化物的是

    下列物质加热分解不会产生氮气的是

    下列关于胆矾的叙述错误的是

    下列哪组离子可共存于溶液中

    下列化合物中不属于缺电子化合物的是

    下列各组化合物性质变化规律正确的是

    元素周期表中第五、六周期的ivb、vb、vib族中的各元素性质非常相似,这是由于

    下列各组离子中每种离子分别与过量naoh溶液反应时,都不生成沉淀的是

    熔融naoh等强碱通常使用

    不能氧化浓盐酸的物质是

    利用奈斯勒试剂可鉴定下列哪种离子

    金属锡与浓硝酸反应所得到的产物有

    下列离子在水溶液中发生歧化反应趋向最大的是

    下列物质在空气中不能稳定存在的是

    下列离子鉴定描述正确的是

    下列关于铅盐的说法不正确的是

    下列各组混合离子,能用氨水分离的是

    既易溶于氢氧化钠又易溶于氨水的是

    在某混合液中加入过量的氨水,先沉淀后得到溶液。 原溶液中所含的离子是

    在硫酸铜和硫酸铁的混合溶液中,加入足量的氟化铵溶液后,再加入碘化钾溶液,将生成

    对某试样进行平行三次测定,得cuo平均含量为30.60%,而真实含量为30.30%,则30.60% - 30.30% = 0.30%为

    下列情况不属于系统误差的是

    下列一元弱酸或弱碱(c= 0.10 mol/l)中,能被直接准确滴定的是

    按照有效数字运算规则,当lgk = 20.43,则k为

    氢与钙元素形成的二元化合物为金属型氢化物。

    次氯酸、偏磷酸、正硼酸都是一元酸;偏硅酸、亚氯酸、亚磷酸都是二元酸。

    乙硼烷中四个b-h 键在同一水平面上,两个3c-2e键位于水平面上下与水平面垂直。

    周期表中,处于对角线位置的元素性质均相似,这称为对角线规则。

    以失去部分结晶水的硼砂为基准物标定盐酸,会使标定结果偏低。

    金属指示剂与金属离子生成的络合物过于稳定,到达滴定终点时金属指示剂不能游离出来,易引起指示剂僵化。

    1在花鸟画的萌芽期有薛稷、边鸾等著名花鸟画作品?

    which of the following cargoes are not carried by bulk carriers?

    what do teu and feu mean?

    what is an lng carrier?

    what is a tanker?

    the ship that transports by-product is called ________.

    what is a cruise ship?

    ro-ro is an acronym for_________.

    which of the following vessels is used to carry both passengers and vehicles?

    which of the following is not the function of tugs?

    which of the following is true about yacht?

    what is bulk cargo?

    what is dwt?

    a: how many tonnes can the vessel load? b:____________________________

    what is true about vlcc and ulcc?

    water bus belongs to _______.

    what does the autopilot system include?

    which of the following is true about a ship?

    which of the following shows the country the ship belongs to?

    where is the anchor chain stowed?

    which of the following is not true about the bulkheads?

    mooring lines can be used in receiving tug assistance.

    anchor equipment includes anchor, anchor chain, fairleads, chain locker.

    waterline refers to the line where hull of a ship meets the water surface.

    forecastle is located on the bow of a ship, used as a shelter for stores, machinery, etc.

    the equipment that can alter and maintain the ship’s course is called telegraph.

    bridge is a room or platform from which the ship can be commanded.

    gmdss is the equipment used to record various data on a ship.

    ais is used to tranit and receive identifying information automatically.

    in the galley, electricity is used for heating and cooking for safety reasons.

    mooring lines are leading ashore from different parts of the ship to prevent ship's movement.

    who is the head of the deck department?

    who undertakes bridge watch-keeping from 0800-1200?

    who is mainly responsible for cargo affairs?

    who is mainly responsible for bridge equipment and instruments?

    who is mainly responsible for the management and maintenance of all life-saving appliances and fire-fighting equipment on board?

    which of the following is true about the ship master?

    which of the following is not the chief officer’s responsibility?

    which of the following is not the second officer’s responsibility?

    which of the following is not the third officer’s responsibility?

    which of the following is not the bosun’s responsibility?

    which of the following is not the ab’s responsibility?

    which of the following is not the ordinary seamen’s responsibility?

    what do cadets usually do on board a ship?

    which of the following is the proper answer to the question “what’s your nationality”?

    if you have something to declare, where should you go?

    what should you do when you receive a wheel order?

    what does the wheel order "meet her" mean?

    if the anchor is secured firmly in sea bottom, what do you report?

    if you want to let go all lines forward except breast line and spring, what should you say?

    what does "finished with engine" mean?

    "course one eight two" is the answer to the question "what is the course?".

    "pay out head line" is an equivalent to "send out head line".

    some of the orders do not need to be reported.

    the initial movement of the engine order telegraph is from the engine control room.

    if you are ordered "stop engine", you need to reply "stop engine", then carry it out, and report "engine stopped".

    when the anchor has been heaved out of the ground and is clear of it, the chief officer should report “anchor is clear.”

    “the cable is 3 o’clock. ” means “the cable is leading to the starboard.”

    mooring lines include head lines, stern lines, spring lines and breast lines.

    stern lines are used to prevent ship's backwards movement.

    "cast off stern line." is another way to say "let go stern line."

    what information should be reported to the pilot station?

    why does a ship contact the port?

    a dangerous part of the pilot’s job is ________.

    a pilot is a person_________ when the ship is approaching a port.

    what does a pilot ladder consist of?

    it’s unnecessary for a master to cooperate with a pilot.

    sometimes, the pilot ladder should be rigged with accommodation ladder.

    if a pilot embarks a ship, we need to hoist flag “g” and lower flag “h”.

    pilot will never control a ship directly.

    the pilot will take over the position of the master when pilotage is compulsory.

    the pilot’s presence on board will relieve the master or officer in charge of navigational watch from their duties and obligations.

    a vessel gets in touch with a port by vhf on a provided channel.

    drafts fore and aft of yukun is 5.3 and 5.4 respectively.

    if the officer on watch has any doubt as to pilot's action or intentions, he/she can take necessary actions before the master arrives.

    what does berthing mean?

    what should a captain do when the vessel is arriving at a port?

    before berthing, the master should take control of the ship accompanied by_________.

    which of the following is not the captain’s responsibilities when the ship is at anchor?

    what factors should be considered when selecting a proper anchor position?

    a vessel may only berth on starboard side.

    “dragging anchor” means the ship moves away from its mooring because the anchor has failed to hold.

    officers on watch know their responsibilities during anchoring or berthing, so the master doesn’t need to give instructions.

    once the anchor is dropped, the officer on watch needs to check its position at regular intervals.

    if the watch officer of a ship finds dragging, vessels in the vicinity will be informed.

    there are three ways of unberthing, that is, bow unberthing, stern unberthing and parallel unberthing.

    the traffic in the vicinity, current, wave, etc. should be considered before unberthing.

    the responsibility for the vessel’s navigation can be transferred to the pilot.

    to prevent the anchor cables from being damaged by strong wind and waves, the friction position of the links should be changed by heaving in and releasing the links regularly.

    ___________ is the only place that is manned at all times while the vessel is at sea.

    ________ is a deck officer who is assigned with the duties of watch-keeping and navigation on a ship’s wheelhouse.

    the oow should follow a navigational plan to avoid collision according to_______.

    _________ takes over the job of an oow.

    the chief officer is in charge of the standard __________navigation watch duty.

    the second officer is in charge of the standard __________navigation watch duty.

    the third officer is in charge of the standard __________navigation watch duty.

    what conditions must be satisfied before the officer takes over the bridge watch?

    the relieved officer shall introduce to the relieving officer _______________.

    when taking over the shift, ____________________.

    while keeping on watch at sea, the officer on watch is the representative of the captain.

    the oow could leave the bridge during the watch.

    according to stcw, the watch-keeping personnel is not allowed to rest.

    the oow should check navigational equipment in use at regular interval of time.

    heading sets 080 degrees. “080 degrees” should be read into “eighty degrees”.

    所属分类:理学习题 浏览量: 73  次

    网站地图