【判断题】
空气冷却器相对传统水冷最显著的优点是耗水量小
A. 对
B. 错
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答案
A
解析
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硫磺催化剂不能在雨、雪、雾等天气时装填,主要原因是防止催化剂吸潮粉化
A. 对
B. 错
【判断题】
在装填催化剂前,必须进入反应器内,按设计高度划出各层瓷球及催化剂的装填标记线
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在高浓度和缺氧情况下进行作业和事故抢救时,应使用隔离式防毒面具
A. 对
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气密介质有相通的管线,必须加装盲板隔断,防止介质互窜
A. 对
B. 错
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试压气密的目的是考察工艺管线、静设备(炉、塔、冷换设备、容器,阀门等)在正常的工艺操作条件下的密封性能,以及检查工程质量检查中焊接质量,安装质量及使用材质等方面
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【判断题】
蒸汽吹扫管线时,可以同时扫多根管线,以节省停工吹扫时间
A. 对
B. 错
【判断题】
用循环水冷却的冷换设备管道内有空气会影响换热效果
A. 对
B. 错
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平时操作中可以将循环水回水直排至地沟
A. 对
B. 错
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停汽后用蒸汽吹扫冷换设备的管程时,一定要打壳程放空阀门,防止闭路受热憋压损坏设备
A. 对
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【判断题】
在烘炉前把固体硫磺装入硫封罐内的目的是通过夹套蒸汽加热使之熔化,形成硫封
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【判断题】
酸性气进炉带液较多时,应加强分液罐的脱液,以免对燃烧炉产生影响
A. 对
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控制阀有故障需要修理时,应先关闭其上下游手阀,然后打开副线阀
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B. 错
【判断题】
停用蒸汽抽空器时,应先关抽空器蒸汽阀
A. 对
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【判断题】
贫液空冷坏,造成尾气中硫化氢含量上升,但是不会造成溶剂发泡
A. 对
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【判断题】
硫磺回收装置停燃料气,则焚烧炉会发生联锁自保
A. 对
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【判断题】
仪表风中断后,风开阀现场改由上下游阀控制进行操作
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氨是一种有臭鸡蛋气味的气体
A. 对
B. 错
【判断题】
液氨中所带的油主要是从污水中带来的
A. 对
B. 错
【判断题】
影响液氨产品质量的除了硫化氢、油和水份外还有脱硫剂的粉尘
A. 对
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氨是一种有臭鸡蛋气味的气体
A. 对
B. 错
【判断题】
液氨从液态变成气态的过程是放热过程
A. 对
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液氨汽化时会放出大量热,气氨溶解于水时也放出大量热
A. 对
B. 错
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汽提酸性气分液罐操作要点是控制好汽提塔顶的压力和分液罐的液位
A. 对
B. 错
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酸性气原料中氨含量高时的处理方法是酸性水汽提装置降低酸气氨含量
A. 对
B. 错
【判断题】
液硫脱气工艺常采用液硫与非净化风混合,空气在硫池底部以鼓泡的形式逸出,在空气与液硫混合过程中,发生氧化反应,部分硫化氢被氧化成单质硫,同时,空气在液硫中以汽提作用,脱除液硫中少量的硫化氢
A. 对
B. 错
【判断题】
液硫脱气时要保证加入过量空气,防止有残存的硫化氢
A. 对
B. 错
【判断题】
当装置酸性气原料突然下降很多时,酸性气燃烧反应炉蒸汽发生器自发蒸汽量上升
A. 对
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克劳斯反应器温度高有利于反应活性的增强,因此高温有利于反应的进行,同时反应又是放热反应,因此低温也有利于反应的进行,但又不能低于硫的露点温度,因此温度必须稳定在合理的范围内才能使反应达到最佳
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过程气中COS含量高是由于原料气带烃引起的,因此溶剂再生装置需加强闪蒸罐操作,提高闪蒸效果
A. 对
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酸性气原料中烃含量高,则过程气中COS含量下降
A. 对
B. 错
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气风比是指燃烧反应炉的空气和酸性气的体积比
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解吸过程与吸收过程正好相反
A. 对
B. 错
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停工时克劳斯催化剂热浸泡操作是指改瓦斯完全燃烧,处理催化剂表面的硫
A. 对
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停工时,克劳斯催化剂热浸泡操作时,应适当减低反应器进口温度
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盲板的主要作用是将生产介质完全分隔,防止切断阀关闭不严或内漏影响生产
A. 对
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溶剂再生塔降量操作是注意不要超温超压,尽可能保证产品的切割
A. 对
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酸性气中烃含量过高,容易形成黑硫磺,此时要适当降低配风比,加强上游脱硫及酸性水汽提装置平稳操作
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焚烧炉烟气氧含量一般控制在2-4%左右,氧过量不仅增加能耗,还会增加三氧化硫、氮氧化物的含量
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控制焚烧炉烟气氧含量的方法可以调整通过焚烧炉燃烧瓦斯的量来实现
A. 对
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酸性气燃烧炉看火孔设有反吹风的目的是防止硫磺冷凝或者灰尘堵塞看火孔
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what improvement does EAP-FASTv2 provide over EAP-FAST? ___
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【单选题】
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【单选题】
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【单选题】
Which statement about the communication between interfaces on the same security level is true?___
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Which feature of the Cisco Email security Appliance can mitigate the impact of snowshoe spam and sophisticated phishing attack?___
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【单选题】
Which quantifiable item should you consider when you organization adopts new technologies?___
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Refer to the exhibit for which reason is the tunnel unable to pass traffic___
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Which type of attack can exploit design flaws in the implementation of an application without___
A. DHCP starvation attacks
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How can you protect CDP from reconnaissance attacks?___
A. Enable dynamic ARP inspection on all untrusted ports.
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C.
D. isable CDP on ports connected to endpoints.
【单选题】
Which type of attack can exploit design flaws in the implementation of an application without ?___
A. DHCP starvation attacks
B. low-rate dos attacks
C. application DDos flood attacks
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E. volume-based DDoS attacks
【单选题】
Which option is a key security compone nt of and MDM deployment ?___
A. using network-specific installer packages
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【单选题】
Which Firepower Management Center feature detects and block exploits and hack attempts?___
A. Content blocker
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【单选题】
hich description of the nonsecret numbers that are used to start a Diffie- Hellman exchange is ture?___
A. They are preconfigured prime integers.
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