摘要:

This is the second part of an article that was prepared from a slide pre sentation given at the B.C. Water and Waste Association, 1977. The first part appeared in March and covered de velopment of wells.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00714.x

出版商:Wiley    

年代:1981

数据来源: WILEY

摘要:

This portion of “Certification Corner” covers pump packing, centrifugal pump maximum suction lift, the C‐factor, backsiphonage preventers, and the effect of air pockets on pump capacity.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00717.x

出版商:Wiley    

年代:1981

数据来源: WILEY

摘要:

AWWA's chlorination training package contains an instructor's guide, slides, a 16mm film, reference texts, and student materials which provide up‐to‐date information on the principles and practices of chlorination. Benefits of and availability information for the package are given.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00715.x

出版商:Wiley    

年代:1981

数据来源: WILEY

摘要:

Two flexible “keys” for operating service valves in bent boxes have been devised. The first is a spring steel rod and the second is a rod of tongue‐and‐groove 12‐in. (30 cm) sections connected with spring steel pins.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00716.x

出版商:Wiley    

年代:1981

数据来源: WILEY

摘要:

Corrections of errors appearing in the January and March 1981 portions of “Certification Corner” are made. The problems involved deal with magnesium concentration, strong base solutions, and pressure requirements in a given filter sand situation.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1981.tb00718.x

出版商:Wiley    

年代:1981

数据来源: WILEY