xix
Chapter
23
Electric Motors and
Controls . . . . . . . . . . . . . . . .598
Advantages of Electric Motors . . . . . . 600
Electric Motors and Magnetism . . . . . 601
Electric Motor Components . . . . . . . . 603
Types of Electric Motors . . . . . . . . . . 604
Motor Nameplates . . . . . . . . . . . . . . . 609
Selecting Electric Motors . . . . . . . . . . 610
Installing Electric Motors . . . . . . . . . . 611
Electric Motor Maintenance . . . . . . . . 617
Safely Using Electric Motors . . . . . . . 620
Chapter
24
Plumbing Design and
Installation . . . . . . . . . . . . .624
Plumbing Codes . . . . . . . . . . . . . . . . 626
Plumbing Systems . . . . . . . . . . . . . . 626
Plumbing Tools . . . . . . . . . . . . . . . . . 630
Plumbing Pipe . . . . . . . . . . . . . . . . . . 633
Pipe Fittings and Valves . . . . . . . . . . 640
Chapter
25
Farm and Landscape
Irrigation . . . . . . . . . . . . . . .646
Irrigation History . . . . . . . . . . . . . . . . 648
Water Sources . . . . . . . . . . . . . . . . . . 650
Water Conservation. . . . . . . . . . . . . . 652
Irrigation Equipment . . . . . . . . . . . . . 654
Irrigation Systems . . . . . . . . . . . . . . . 656
Irrigation System Design . . . . . . . . . . 661
Irrigation System Management . . . . . 665
Irrigation System
Troubleshooting. . . . . . . . . . . . . . 668
Chapter
26
Environmental Controls . . .676
Thermodynamics . . . . . . . . . . . . . . . 679
Housing Livestock . . . . . . . . . . . . . . . 684
Grain Storage . . . . . . . . . . . . . . . . . . 690
Perishables and Other Crop
Storage . . . . . . . . . . . . . . . . . . . . 693
Refrigeration . . . . . . . . . . . . . . . . . . . 694
Evaporative Cooling . . . . . . . . . . . . . 696
Ventilation and Exhaust Systems . . . 697
Chapter
27
Fundamentals of
Metalworking . . . . . . . . . . .704
Metals Commonly Used in
Agriculture . . . . . . . . . . . . . . . . . . 706
Designing and Planning
Metal Projects . . . . . . . . . . . . . . . 709
Marking Metal . . . . . . . . . . . . . . . . . . 712
Cutting Metal . . . . . . . . . . . . . . . . . . . 713
Shaping Metal . . . . . . . . . . . . . . . . . . 721
Drilling Metal . . . . . . . . . . . . . . . . . . . 727
Assembling Metal . . . . . . . . . . . . . . . 730
Heat-Treating Metal . . . . . . . . . . . . . . 737