When testing available water supply, enough hydrants should be opened to drop static pressure by ___ percent for the most accurate results

Which of the following organizations develops testing processes that other testing organizations use in the development of safety products?

A. ASTM International B. Standards Council of Canada (SCC) C. Underwriters Laboratories, Inc. (UL) D. American National Standards Institute (ANSI)

Vertical sections of pipe that connect the underground supply to the rest of the piping are known as:

A. water pipes. B. cross mains. C. system risers. D. water supply mains.