Following are the abbreviations and symbols used herein. An attempt has been made to follow the standards of the pumping industry where possible.

ASCII American Standard Code for Information Interchange

ASHRAE American Society of Heating, Refrigeration, Air-Conditioning Engineers

ASME American Society of Mechanical Engineers

ASTM American Society of Testing and Materials

ANSI American National Standards Institute

ac Alternating, electrical current

A Area in square inches

? (beta) Ratio of diameters for an orifice-type flow meter or angle in centrifugal pump vector diagram

bhp ( P _p) Brake horsepower required by a pump

bhp-hr Energy consumed by a pump operating at 1 bhp for 1 hour

BTU British Thermal Unit (Energy equal to 778.2 foot-pounds or the amount of heat required to raise 1 lb of water 1 F at 60 F)

Binary Any process with two possible conditions, i.e., a digital output or a two-position switch

C (1) Hazen-Williams constant or (2) temperature ( C)

CPVC Chlorinated polyvinyl chloride pipe

cfs Flow in ft ³/sec

CAD Computer-aided design

cp Centipoise, a measure of absolute viscosity

c _p Specific heat of water at constant pressure

cu Cubic, as in cubic foot

? (gamma) Specific weight of water in lb/ft ³

D Inside diameter of pipe in inches

d Inside diameter of pipe in feet or diameter...