This 4th Edition provides the latest information on the safe and efficient operation of boilers and related equipment. This Workbook covers virtually all facets of steam boiler operation, maintenance, and troubleshooting. The 4th Edition is a complete instructional reference for use in preparing to pass a boiler operator's licensing exam. This Workbook includes the latest information on instrumentation and PLC controls systems, variable-frequency drives (VFDs), steam system optimization, reverse osmosis systems, low-NOx burners, and boiler start-up and shutdown procedures.