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【判断题】
[111]C-201润滑油压力低于160KPa引起辅助油泵自启。
A. 对
B. 错
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[112]裂解气压缩机复水液面是分程控制的。
A. 对
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[113]乙烯制冷系统是也一个密闭的循环回路,采用蒸汽透平驱动的四段离心式压缩机。
A. 对
B. 错
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[114]在元素周期表中,同一族的元素,从上到下,金属性增强,非金属性减弱。
A. 对
B. 错
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[115]催化剂只能改变反应达到平衡的时间,不能使平衡发生移动。
A. 对
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[116]催化剂将使平衡向正反应方向移动。
A. 对
B. 错
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[117]在元素周期表中,同一周期元素,从左到右,金属性逐渐增强,非金属性逐渐减弱。
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[118]如果物质的分子发生了变化,有新物质产生,这样的变化就是化学变化。
A. 对
B. 错
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[119]在工厂中所称的“压力”,实际上就是压强。
A. 对
B. 错
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[120]离心泵的运行电流与输送量无关.
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[121]换热器传热温差越大,换热能力也越大。
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[122]氢含量越低的原料,其裂解性能越差。
A. 对
B. 错
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[123]带支链的烷烃比直链烷烃难裂解。
A. 对
B. 错
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[124]含有相同碳原子的二烯烃和炔烃互为同分异构体。
A. 对
B. 错
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[125]气体只有在临界温度以下才能液化。
A. 对
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[126]物质能量低的状态较能量高的状态稳定。
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[127]一般地,液体的粘度随温度的升高而降低。
A. 对
B. 错
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[128]一般地,气体的粘度随温度的升高而增大。
A. 对
B. 错
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[129]NaCl的溶解度随温度升高而明显增大。
A. 对
B. 错
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[130]一般地,含有10个碳原子以上的烯烃在常温常压下是气体。
A. 对
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A. 对
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[132]催化剂在反应过程中少量反应。
A. 对
B. 错
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[133]催化剂在反应前后质量保持不变。
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[134]微分时间越长,微分作用越弱。
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[135]微分时间越长,微分作用越强。
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[136]积分时间越长,积分作用越弱。
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B. 错
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[137]
A. 对
B. 错
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[138]由于被测流体可能混有杂物,所以为了保护椭圆齿轮流量计,必须加装过滤器。
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B. 错
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[139]热电偶的热电特性由电极材料的化学成分和物理性能所决定。
A. 对
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[140]压缩机在低速暖机之前就应该先将二级密封气投用。
A. 对
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[141]压缩机在启机过程中要密切关注排气温度的变化。
A. 对
B. 错
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[142]压缩机停机后,外引密封气电磁阀自动打开。
A. 对
B. 错
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[143]装置检修后在开车前所有仪表已彻底校验,DCS控制系统可随时投入使用。
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[144]真空度等于大气压加上绝
A. 对
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[145]汽轮机试运前,转子盘车检查时.设备内应无摩擦、卡涩现象。
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[147]隔膜泵启动前不需灌泵与排汽。
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[148]塔罐倒空时,要先泄压,后倒空。
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[149]设备的基本维护工作主要包括检查、调整、润滑、清洁卫生、状态检测。
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[150]塔器日常操作中,允许超温、超压。
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