问题 问答题 简答题

试述104型分配阀的组成和各部功用?

答案

参考答案:

104型分配阀由中间体、主阀和紧急阀3部分组成。

(1)中间体

中间体是铸铁件,它的4个垂直面分别用作主阀、紧急阀和各连接管的安装座面,中间体外接有4根管子:制动管、副风缸管、工作风缸管和制动缸管,中间体内有3个空腔:容积室(3.5L),紧急室(1.5L)和局减室(0.6L)。同时,在主阀安装面的制动管通路内装有一个滤尘器,防止杂质进入分配阀。

(2)主阀

主阀由作用部、充气部、均衡部、局减阀和增压阀5部分组成,主阀的作用是控制分配阀的充气缓解、制动和保压等作用。

(3)紧急阀

紧急阀主要由紧急活塞、安定弹簧、紧急活塞杆、放风阀、放风阀导向杆、放风阀弹簧等组成。其作用是在紧急制动时加快制动管的排气,提高紧急制动的灵敏度和紧急制动波速。

完形填空

第二节完形填空(共20小题;每小题1.5分,满分30分)

My first job was at a local diner, where I worked for seven years and learned so many lessons, especially from a fellow waitress.

Helen was in her 60s and had extraordinary self-respect, something I was really lacking. I looked up to Helen 41  she was doing what she loved---  42  people--and nobody did it  43  . She always made everyone, customers and co-workers,   44   and feel good.

Being a waitress changed my life. One of my 45 customers was Fred Hasbrook. He always ate an omelet, and when I saw him 46 , I tried to have it on his table as soon as he sat down.

Thanks to the newfound confidence I 47 from Helen, I dreamed of having my own 48 .But when I called my parents to ask for a loan (贷款), they said, "We just don't have the  49 ."

The next day, Fred saw me and asked, "What's up? You're not smiling today”. I 50 my dream with him and said, "Fred, I know I can do more if somebody would just have 51  in me."

Before long he handed me checks totaling $ 50,000--along with a  52  that read, "The only collateral(抵押) on this loan is my trust in your  53  as a person. Good people with a dream should have the 54 to realize that dream."

I took the checks to Merrill Lynch, where the money was provided for me. I 55 working at the diner, making 56 for the restaurant I would open. My plans failed, 57 , and I lost the money.

Later I decided to apply for a job at Merrill Lynch. Even though I had no experience, I was  58 and ended up becoming a pretty good agent.  59 I paid back Fred the $ 50,000, plus 14 percent annual interest. Five years later, I was able to 60 my own firm.

41. A. because          B. though                C. while                  D. unless

42. A. helping          B. respecting             C. serving                  D. praising

43. A. faster           B. better                 C. harder                 D. later

44. A. drink            B. digest                C. smile                  D. sing

45. A. regular          B. favorite              C. tough                         D. fresh

46. A. eating           B. greeting              C. ordering                D coming

47. A. found out        B. picked up            C. got back                D. took away

48. A. restaurant        B. confidence            C. house                  D. work

49. A. choice           B. way                  C. idea                   D. money

50. A. exchanged               B. discussed               C. shared                 D. analyzed

51. A. patience           B. pride                     C. faith                        D. interest

52. A. letter            B. sign                  C. notice                  D. note

53. A. honesty          B. responsibility         C. devotion              D. motivation

54. A. ability            B. luck                       C. time                 D. chance

55. A. loved                   B. practiced             C. continued           D. enjoyed

56. A. adjustments      B. plans                C. decisions             D. suggestions

57. A. instead                  B. therefore             C. though               D. meanwhile

58. A. hired             B. rejected              C. encouraged           D. determined

59. A. Fortunately       B. Excitedly             C. Personally                  D. Eventually

60. A. design            B. open                C. restart                  D. expand

单项选择题 B1型题