摘要:

One‐call notification systems are an effective way of reducing damages to existing underground utility lines caused by adjacent construction and equipment. Costs, benefits, and operation of these systems are described.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00632.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

This portion of “Math for Operators” features problems applying percentages to situations faced by water utility operators. A table of percent, fractional, and decimal equivalents is included.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00633.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

For three commonly used gases—chlorine, sulfur dioxide, and ammonia—maximum sustained gas withdrawal rates from shipping containers can be estimated by a simple equation. The equation requires that the operator know room temperature, “threshold temperature,” and a “withdrawal factor.” This article explains the terms of the equation and gives examples of its application.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00634.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

The three ideas featured in this month's “Gimmicks and Gadgets” are a method for reconditioning meter lenses when they become scratched and abraded, a design for a meter‐head holder for plastic pipe, and a way to retain gas cylinders in a storage rack made of deformed steel rod.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00635.x

出版商:Wiley    

年代:1980

数据来源: WILEY

摘要:

Questions in this month's “Certification Corner” cover carrying capacity of water mains, use of activated carbon, characteristics of “strong” and “weak” acids, the amperometric titration method, calcium hypochlorite, water horsepower calculation, distribution system pressure, and liquid and gaseous chlorine equivalents.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1980.tb00636.x

出版商:Wiley    

年代:1980

数据来源: WILEY