tailieunhanh - SUBCOURSE OD1750EDITION AREFRIGERATION AND AIR CONDITIONING IV

Technology can be most broadly defined as the entities, both material and immaterial, created by the application of mental and physical effort in order to achieve some value. In this usage, technology refers to tools and machines that may be used to solve real-world problems. It is a far-reaching term that may include simple tools, such as a crowbar or wooden spoon, or more complex machines, such as a space station or particle accelerator. Tools and machines need not be material; virtual technology, such as computer software and business methods, fall under this definition of technology.[10]. | SUBCOURSE OD1750 EDITION A REFRIGERATION AND AIR CONDITIONING IV EQUIPMENT COOLING fl Nclice Use the Ordnance Training Division website http ordnarice to submit your questions comments and suggestions regarding Ordnance and Missile Munitions subcourse content. If you have access to a computer with Internet capability and can receive e-mail we recommend that you use this means to communicate with our subject matter experts. Even if you re not able to receive e-mail we encourage you to submit content inquiries electronically. Simply include a commercial or DSN phone number and or address on the form provided. Also be sure to check the Frequently Asked Questions file at the site before posting your inquiry. REFRIGERATION AND AIR CONDITIONING IV EQUIPMENT COOLING Subcourse OD1750 Edition A United States Army Combined Arms Support Command Fort Lee VA 23801-1809 14 Credit Hours INTRODUCTION This subcourse is the last of four subcourses devoted to basic instruction in refrigeration and air conditioning. The scope of this subcourse takes in unit components of the absorption system including their functions and maintenance water treatment methods and their relationship to centrifugal systems centrifugal water pumps and electronic control systems including the relationship of amplifier bridge and discriminator circuits to electronic controls. The subcourse consists of three lessons. Lesson 1. Direct Expansion and Absorption System. 2. Centrifugal Systems and Water Treatment. 3. Centrifugal Water Pumps and Electronic Control Systems. Unless otherwise stated whenever the masculine gender is used both men and women are .