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【判断题】
[151]润滑油“五定”的内容是定人、定点、定时、定量、定质。
A. 对
B. 错
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[152]超高压蒸汽在压缩区的用户是C-201和C-601。
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[153]安全阀阀瓣与阀座的材料必须能够抗冲击、耐腐蚀,允许使用铸铁材料。
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[154]泵内流体和泵外大气间存在着压差,流体沿着轴和壳体间的间隙向外泄露,为此需设密封装置,称其为轴封。
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[156]冬季, 室外的泵应注意做好防冻防凝工作,在停车后不用放出泵内液体(如工艺)允许时。
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[158]当裂解气负荷变化时,最经济的控制方法是调节压缩机的转速。
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[159]碱液带入压缩机内不会损坏设备。
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[160]裂解气压缩机只能用五段压缩机时不能用四段压缩。
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[162]在其它条件不变的条件下,乙烯、丙烯的总收率随原料特性因数K的增加而增加。
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[163]相等体积的任何气体都含有相同数目的分子。
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[164]当冷热流体的进出口温度一定时,逆流操作比并流操作的平均传热温差△t大。
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[165]压缩机在临界转速下运转时,机组会发生振动,低于或高于该转速振动会自然消失。
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[166]油运时,过滤网应安装在润滑油泵过滤网处。
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[167]干燥器再生步骤中冷吹的目的是用甲烷把流体汽化解吸。
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[173]当单台泵流量足够,而扬程不足时,可采用两台型号相同的泵并联使用。
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[175]静电可以引起爆炸,火灾及人身伤害。
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[176]发生一氧化碳中毒后,要立即将病员撤离污染区域,必要进施行人工呼吸,输氧,立即请医生治疗。
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[177]在连通着的同一种静止流体内,处于同一水平面的各点压强相等,而与容器的形状无关。
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[178]可燃物质在空气中的含量高于爆炸上限时,不会爆炸,但可能燃烧。
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( ) 30. Why did the father not ask his son not to do this and do that?    A.Because he felt quite confident of his son.    B.Because he was born from a poor family.    C.Because he was a man of few words.    D.Because he didn't want to be much too strict with his son.
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( ) 31. What would someone learn from this passage?    A.How to live by oneself. B.How to stand on one's own feet.    C.What a good father should do. D.What the self-important is like.
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( ) 32. What may be the proper Chinese for the underlined part in the passage?    A.闲暇时光 B.学费 C.精神空虚 D.经济不足
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( ) 33. Why did Natalie Smith pay for the six cars behind her? A. She had seven tickets. B. She hoped to please others. C. She knew the car drivers well. D. She wanted to show kindness.
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( ) 34. Judy Foreman copied down the phrase because she ___ . A. thought it was beautifully written B. wanted to know what it really meant C. decided to write it on a warehouse wall D. wanted her husband to put it up in the classroom
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( ) 38. From a dam, people can use the water for ___________. A. keeping the rivers clean B. only making electricity C. irrigation and making electricity D. washing clothes
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( ) 39. The water in the river is polluted because of _____________. A. people's drinking water too much B. people's swimming in the river too much C. chemicals and other materials D. people's building a dam across a river
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