第一章测试1.The function of the condenser is to provide (B) product and ensure suitable liquid phase reflux. 冷凝器的作用是提供____产品及保证有适宜的液相回流。（ ）
A:Overhead vapor phase塔顶气相; B:Bottoms vapor phase塔底气相; C:Bottoms liquid phase塔底液相; D:Overhead liquid phase塔顶液相;
答案:D
2. If the reflux ratio used in the continuous distillation operation is less than the original reflux ratio, then____. 操作中连续精馏塔，如采用的回流比小于原回流比，则____。（ ）
A:Both x D and x W increase x D、x W 均增加; B:X D and x W remain unchanged X D、 x W 均不变; C:Unable to operate normally不能正常操作; D:x D decreases and x W increases x D 减小，x W 增加;
答案:A
3.In the calculation of continuous distillation of binary solutions, changes in the thermal state of the feed will cause changes in the following line ____. 二元溶液连续精馏计算中，进料热状况的变化将引起以下线的变化。（ ）
A:Equibrium line and Striping section operation line, 平衡线与提馏段操作线; B:q line and rectifying section operation line, q 线与精馏段操作线; C:Striping section operation line and q line, 提馏段操作线与 q 线; D:Equilibrium line and q line, 平衡线与 q 线;
答案:C
4. Introducing reflux in distillation results in mass transfer between the falling liquid phase and the rising vapor phase, which increases the concentration of volatile components in the rising vapor phase. The most appropriate statement is ____. 精馏中引入回流，下降的液相与上升的汽相发生传质使上升的汽相易挥发组分浓度提高，最恰当的说法是____。（ ）
A:The difficult volatile components in the vapor phase enter the liquid phase汽相中难挥发组分进入液相; B:The volatile and non-volatile components in the liquid phase enter the vapor phase simultaneously, but there are more volatile components among them液相中易挥发组分和难挥发组分同时进入汽相，但其中易挥发组分较多; C:The entry of volatile components in the liquid phase into the vapor phase and the entry of non-volatile components in the vapor phase into the liquid phase must occur simultaneously. 液相中易挥发组分进入汽相和汽相中难挥发组分进入液相必定同时发生。 D:The volatile components in the liquid phase enter the vapor phase液相中易挥发组分进入汽相;
答案:C
5. Given the equation of the distillation section operating line as y=0.75x+0.24, the operating reflux ratio of the tower is ____. 已知精馏段操作线方程为： y=0.75x+0.24 ，则该塔的操作回流比为____。（ ）
A:0.96 B:0.9 B .3 C:4 D:0.98；
答案:A
6. Given the equation of the distillation section operating line as y=0.75x+0.24, then the top product concentration X D is ____. 已知精馏段操作线方程为： y=0.75x+0.24 ，塔顶产品浓度 X D 为____。（ ）
A:4 B:0.96 C:0.9 B .3 D:0.98；
答案:A
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