Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. Chapter 5 Measurement 711 71 Objectives Information in this chapter will enable you to: Understand the purpose of the many measurements used in HVACR work. Perform linear measurements and convert between the different units in US Customary and SI systems. Perform capacity measurements and convert between the different units in US Customary and SI systems. Perform weight measurements and convert between the different units in US Customary and SI systems. Perform temperature measurements and convert between the different units in US Customary and SI systems. Calculate heat values and convert between the different units in US Customary and SI systems. Perform pressure measurements and convert between the different units in US Customary and SI systems. Perform velocity measurements and convert between the different units in US Customary and SI systems. Technical Terms absolute pressure (psia) air velocity atmosphere (atm) bar British thermal unit (Btu) Btu per hour (Btu/hr) calorie (cal) capacity Celsius scale charge critically charged cubic feet per minute (cfm) cubic meter per minute (m3/min) degree dry-bulb (db) temperature Fahrenheit scale feet per minute (fpm) foot (ft) gauge pressure (psig) grain (gr) gram (g) heat horsepower (hp) inch (in) inches of mercury (in. Hg) inches of water column (in. WC) joule (J) Kelvin scale kilogram (kg) kilojoule (kJ) kilometer (km) kilopascal (kPa) latent heat linear measurement mass CHAPTER 5 Measurement (Continued) Chapter 7
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