问题 问答题 简答题

机械搅拌式浮选机的设备完好标准是什么?

答案

参考答案:

机械搅拌式浮选机的设备完好标准是:

(1)主轴保持垂直,每米允差不超过0.3㎜,主轴安装后用手能转动且运转平稳,不得有摆动和窜动现象;

(2)叶轮在轴上安装牢固,螺钉不得松脱,叶轮与定子轴向和径向间隙应符合设计要求,最大间隙不超过原规定的2倍,叶轮磨损不超过原直径的10%,不得有洞眼和裂纹;

(3)刮泡器轴不得窜动,并应呈水平和直线状态。用手转动轴时,在轴瓦处应无蹩劲现象,两平行刮板不得相碰,刮泡器齐全、牢固、平直,无严重变形,刮板与槽体的间隙为3㎜~5㎜,各室刮板依次相差的角度适宜,刮板胶皮要调整好,应能使浮选泡沫都刮入槽内;

(4)机壳、机架不得有裂缝,各部件连接与地脚螺钉不得有松动,机架牢固,当立轴与叶轮转动时,不得有震动现象;

(5)液位闸板调整灵活,行程符合要求,手轮及丝杠无损坏,最后一室密封必须良好;

(6)浮选槽及调节槽内的衬板如已磨损,应及时更换,不得磨损外壳,机壳各部及管道,闸门均不得漏水;

(7)充气孔、套筒和中心轴充气孔不得堵塞,调整要灵活;

(8)润滑系统工作良好。

完形填空

Many Chinese students don’t pay much attention to spoken English at school. They think it necessary to practice   36  English in class, but not   37  class. Here is a story to show you   38  important it is to speak the English language freely in everyday life.

A foreigner once   39  hungry and went into a restaurant in London. He sat down at a table. When the waiter came, he   40  his mouth, put his fingers into it and took them out again in order to   41  that he wanted something   42  because he could not speak English. The waiter soon   43  him a cup of tea. The man shook his head. The waiter then took   44  the tea and gave him a cup of coffee. Still the man didn’t   45  what he wanted. He tried again and again, but he wasn’t able to make the waiter   46  him. Finally   47  man came in. He spoke English   48  and fluently. After a few minutes, there was a large plate of meat and vegetables on the table in front of   49  .

So you see a man can go hungry if he   50  master(掌握)a foreign language.

小题1:A. speak                       B. speaking                 C. to speak

小题2: A. outsider                   B. out                      C. out of

小题3: A. how                        B. how an                   C. what an

小题4: A. get                        B. gets                     C. got

小题5:A. open                       B. opened                   C. opens

小题6: A. express                        B. expressed                    C. expressing

小题7:A. eats                        B. eating                       C. to eat

小题8:A. took                        B. brought                  C. bought

小题9:A. away                        B. out of                       C. down

小题10:A. make                        B. give                     C. get

小题11: A. understand                 B. understood                   C. be understood

小题12:A. other                       B. the other                    C. another

小题13:A. clean                       B. clear                        C. clearly

小题14:A. he                          B. him                      C. his

小题15:A. doesn’t                        B. won’t                       C. isn’t

单项选择题