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【单选题】
压缩机油路系统蓄压器性能试验时,下列说法不正确的有___。
A. 备用油泵投自动
B. 联锁复位
C. 危急保安器复位,自动主汽阀打开
D. 油压低后联锁和自动主汽阀应动作
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答案
D
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相关试题
【单选题】
压缩机透平复水器高液位,会导致___。
A. 排气温度下降
B. 压缩机联锁停车
C. 真空度升高
D. 备用复水泵自启动
【单选题】
抽真空试验合格的标准是___。
A. 调节开工喷射泵的中压蒸汽阀门,使表面冷凝器的绝压为0.03MPa左右,压力能维持半小时以上
B. 系统氮气充压到0.05 MPa左右,压力能维持半小时以上
C. 系统氮气充压到0.03MPa左右,压力能维持半小时以上
D. 系统氮气充压到0.05MPa左右,压力能维持1小时以上
【单选题】
抽真空试验的方法是___。
A. 氮气充压
B. 空气充压
C. 蒸汽充压
D. 开工泵抽真空
【单选题】
密封蒸汽的作用是___。
A. 防止裂解气污染密封油
B. 防止透平中的蒸汽向大气泄漏
C. 防止润滑油污染干气密封
D. 防止密封油进入机体
【单选题】
透平开车时,___投用密封蒸汽比较合适。
A. 压缩机开车之前
B. 升速前
C. 建立真空,暖机之前
D. 压缩机开车正常后
【单选题】
C-300压缩机油路系统经贮压器内充的气体是___。
A. 氮气
B. 氢气
C. 氧气
D. 一氧化碳
【单选题】
压缩机油路系统调速油的作用是___。
A. 将轴瓦产生的热量带走
B. 在轴瓦的表面产生油膜
C. 为调速器提供动力油
D. 密封作用
【单选题】
油冲洗周期的长短取决于___。
A. 油循环时的流量和流速
B. 各条管线的清洁度
C. 冲洗油的压力
D. 冲洗油的温度
【单选题】
压缩机油路系统开车前,油洗的合格标准是___。
A. 200目的滤网上无硬质金属颗粒,非金属污点量不超过每平方厘米5点
B. 200目的滤网上无硬质金属颗粒,非金属污点量不超过每平方厘米2点
C. 100目的滤网上无硬质金属颗粒,非金属污点量不超过每平方厘米1点
D. 100目滤网上无硬质金属颗粒,非金属污点量不超过每平方厘米2点
【单选题】
油站油路小透平,使用的是___蒸汽。
A. 低压
B. 中压
C. 高压
D. 超高压
【单选题】
做汽轮机单试时,超速试验应做___次。
A. 1次
B. 2~3次
C. 5~6次
D. 6次以上
【单选题】
汽轮机单试时,下列说法正确的是___。
A. 透平单试时,不要暖机
B. 升速时,复水液面一般不会升高
C. 升速时,如果透平膨胀不均匀,机体振动和轴位移都将在轴承温度上有所显示
D. 蒸汽透平可以长期低负荷下运行
【单选题】
做超速跳闸试验时,下列说法不正确的是___。
A. 调速器错油门全开
B. 抽汽错油门全开
C. 用调速器升速
D. 用主汽阀升速
【单选题】
T-340塔的洗涤水是___。
A. 锅炉给水
B. 工业用水
C. 急冷水
D. 生活用水
【单选题】
碱洗的目的是___。
A. 脱除重烃
B. 脱除氢气
C. 脱除酸性气体
D. 脱除杂质
【单选题】
碱洗塔设水洗段的目的___。
A. 脱除裂解气中残余的二氧化碳气体
B. 脱除裂解气中残余的硫化氢气体
C. 脱除裂解气中夹带的气油
D. 脱除裂解气中夹带的碱
【单选题】
T-340塔的灵敏板温度控制是采用___加热。
A. 蒸汽
B. 急冷水
C. 急冷油
D. 锅炉水
【单选题】
废碱脱气罐V-343的作用是___。
A. 维持一定压力
B. 脱除未反应的酸性气体
C. 脱除废碱液中夹带的烃
D. 脱除废碱液中夹带的水分
【单选题】
T-340塔釜中的黄油来自___。
A. 烃类冷凝和聚合
B. 随裂解气带来的
C. 与碱反应的生成物
D. 硫化氢与碱反应的产物
【单选题】
碱洗过程中产生的黄油简指___。
A. 重质汽油
B. 碱性汽油
C. 黄色汽油
D. 柴油
【单选题】
干燥器的再生步骤不包括___。
A. 冷吹
B. 升温
C. 还原
D. 恒温
【单选题】
干燥器再生通过E-372将再生气加热,热源是用___加热的。
A. MP
B. HP
C. LP
D. SHP
【单选题】
干燥器开车可选用___作再生介质。
A. 蒸汽
B. 仪表风
C. 氮气
D. 工业风
【单选题】
P-470A/S气相预冷需要多少时间___。
A. 2h
B. 1.5h
C. 1h
D. 0.5h
【单选题】
关于P-626预冷的目的不正确的是___。
A. 避免启动后发生变形
B. 为了减少摩擦
C. 使泵体各构件收缩均匀
D. 防止泵启动后密封受冷不均而损坏
【单选题】
乙烯制冷压缩机C600系统的实气置换气一般放至___。
A. 干火炬
B. 湿火炬
C. 大气
D. 油污井
【单选题】
丙烯制冷压缩机C650系统的实气置换气一般放至___。
A. 湿火炬
B. 干火炬
C. 大气
D. 油污井
【单选题】
对于理想气体,等焓节流膨胀前后的温度___。
A. 变高
B. 变低
C. 不变
D. 先升高后降低
【单选题】
实际制冷过程中,液体制冷剂的膨胀过程一般采用___。
A. 等焓节流膨胀
B. 作外功的节流膨胀
C. 等熵节流膨胀
D. 等温膨胀
【单选题】
C-300压缩机透平,使用的是___蒸汽。
A. 低压
B. 中压
C. 高压
D. 超高压
【单选题】
C-300氮气开车前应具备的条件,下列说法不正确的是___。
A. 透平真空已建立
B. 油路已投用
C. T-340已建立循环
D. 洗油已投用
【单选题】
压缩机开车时,要遵循___的原则。
A. 升速要慢
B. 先升压后提速
C. 先提速后提压
D. 升速要快
【单选题】
关于乙烯装置的开车顺序,下列说法不正确的是___。
A. 制冷压缩机开车后,裂解炉投料
B. 先开裂解气压缩机后开制冷压缩机
C. 先开丙烯制冷压缩机后开乙烯制冷压缩机
D. 制冷压缩机开车时,不带用户
【单选题】
关于裂解气压缩机的开车程序,下列说法不正确的是___。
A. 在裂解气压缩机接收裂解气之前,可以先氮气运行
B. 段间冷凝器先期投入使用
C. 酸性气体脱除系统先期投入使用
D. 最小流量返回阀处于全关闭状态
【单选题】
裂解气压缩机开车前,应确保润滑油系统油箱温度不低于___。
A. 15℃
B. 30℃
C. 60℃
D. 80℃
【单选题】
不是裂解气压缩机系统外来线的是___。
A. LDPE
B. PP线
C. 富乙烯线
D. 最小流量返回线
【单选题】
C-300油路系统油气分离器气相在开车正常后,排向___。
A. 火炬
B. 一段吸入罐
C. 大气
D. 脱气罐
【单选题】
富乙烯气返回C-300哪个段间罐___。
A. V-310
B. V-320
C. V-330
D. V-335
【单选题】
罐区不合格乙烯回炼哪里___。
A. E-310
B. E-320
C. E-330
D. E-343
【单选题】
C-650提供多少个级别的冷剂___。
A. 3个
B. 4个
C. 5个
D. 6个
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