TABLE OF CONTENTS A comprehensive theoretical and practical basis for this technical area can be found in just two widely available publications, the NFPA Fire Protection Handbook and SFPE Handbook of Fire Protection Engineering. Instead of duplicating the excellent reference materials in those volumes, this Division guides the use these references in an organized manner for studying.
The following two themes are emphasized throughout this division:
How to apply fluid statics and dynamics principles to fire protection problems
How nationally recognized codes, standards and practices address the issue of reliability
In addition, Section 1.5 addresses the use of significant digits in calculations. Although the techniques are demonstrated for water supply problems, they apply to every syllabus category.
The following physical constants and conversion factors are useful for solving hydraulics problems:
| Density of pure water at 70 F (21 C | - | 62.4 lb m/ft 3 (10 3 kg/m 3) |
| Density of mercury | - | 849 lb m/ft 3 (1.36x10 4 kg/m 3) |
| Ratio of weight of mercury to water | - | 13.6 |
| Vapor pressure of water at 70 F (21 C) | - | 0.361 psia (2.49 kPa) |
| Conversion from feet head of water to psi | - | 0.433 psi/ft |
| Gravitational acceleration constant (g) | - | 32.2 ft/sec 2 (9.81 m/s 2) |
| Conversion from slugs to lb m on earth | - | 32.2 lb m/slug |
| Conversion from ft 3 to gallons | - | 7.48 gallons/ft 3 |
The following table defines...
