问题 问答题 简答题

室内给水设备系统的方式有哪些?简述其特点和适用范围?

答案

参考答案:

各种给水设备系统可按照水平配水于管的敷设位置,布置成下行上给式、上行下给式和环状式三种管网形式。

室内给水设备系统的方式(1)直接给水方式。当市政给水管网的水质、水量、水压均能满足室内给水管网要求时,宜采用直接给水方式。

(2)设贮水池、水泵的给水方式。当室外给水管网的水量能满足室内要求,而水压大部分时间不足时,宜采用设贮水池、水泵的给水方式。

(3)仅设水箱的给水方式。当室外给水管网的水量能满足室内要求,但每天的水压周期性不足时,可仅设高位水箱使室外管道直接进人建筑物内部,水箱设在建筑物的顶层之上。

(4)设水泵、水箱的给水方式。这种方式适合用于室外给水管网的水压经常性低于室内给水管网所需的水压,但供水量很充足,且室内用水量又很不均匀的情况。

(5)竖向分区给水方式。对于层数较多的建筑物,当室外给水管网水压不能满足室内用水时,可将其竖向分区。各区采用不同的给水方式:

l)低区直接给水,高区为设贮水池、水泵、水箱的给水方式。2)设贮水池和水泵、水箱分区并联给水方式。3)气压水罐并列给水方式。4)并联直接给水方式。5)水泵、水箱分区串联给水方式。6)水箱减压供水方式。7)减压阀供水方式。高层建筑供水管路,也可采用减压阀。这种供水方式有高位水箱减压阀给水方式、气压水箱减压阀给水方式及无水箱减压阀供水方式,采用减压阀的最大优点是占用建筑面积少,儿缺点是水泵的运行动力费用高。

单项选择题
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)

阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

It was almost Christmas. We wrote to my father, asking him to  36  an artificial tree for us and   _37  it to us in several smaller boxes. Two days before Christmas we were in a  38  . All of the boxes that my father had sent us arrived except for the one with the tree  39 . We decided to wait one more day.

Meanwhile, in Bremerhaven, a young mail clerk  40  a box under a counter. He  41  that someone would be without a tree for Christmas. Although he was closing up and there was no  42_   on Christmas, he processed the mail and got it to Mannheim.

After putting the  43  on the proper shelf, he headed to the snack bar. The place was  44   and he ended up sharing a table. Two men were speaking and the clerk discovered that one of his  45  at the table was working in Mannheim. He said to the man, "You could  46  play Santa for someone in Mannheim tonight if you'd like to." The man  47  to deliver it and the two walked to the mail room to  48  the package.

At home in Mannheim, we were busily  49  to think up some way to put our tree together, but couldn't  50  a workable solution. We were ready to give up  51  the door bell rang. There stood a stranger holding a long  52  carton, our tree trunk. We invited him in,  53  it was Christmas Eve and he was  54  to get home to his own family.

The next day as we watched our little boy's eyes light up at the  55  of our beautiful tree, I whispered a little prayer: "Bless the stranger who brightened up our Christmas with his kindness."

36. A. sell              B. buy              C. deliver                 D. bring

37. A. send            B. pass                 C. carry                 D. take

38. A. surprise          B. hunger             C. pleasure                     D. panic

39. A. leaf            B. trunk                C. stand                 D. branch

40. A. watched        B. caught               C. spotted                D. broke

41. A. directed         B. whispered           C. realized                 D. confirmed

42. A. delivery         B. customer             C. money                 D. letter

43. A. present         B. tree              C. mail                           D. package

44. A. crowded         B. small             C. noisy                  D. normal

45. A. friends          B. colleagues           C. relatives               D. companions

46. A. really           B. confidently        C. kindly                 D. patiently

47. A. overcame       B. agreed              C. astonished             D. struggled

48. A. fetch              B. transform           C. post                       D. consult

49. A. solving          B. explaining          C. trying                 D. worrying

50. A. come across      B. come back to        C. come upon             D. come up with

51. A. while             B. when              C. as                        D. since

52. A. slim            B. beautiful           C. thick                 D. heavy

53. A. but               B. so                  C. because                D. or

54. A. in surprise       B. it, the, way         C. in a hurt7                    D. in lime

55. A. sight            B. back            C. corner                  D. scene