This manual provides in-depth coverage of topics related to boiler operations. The assignments contain an objective, descriptive information, reference sources, procedures, and assignments. Sixteen units are provided and address topics such as: (1) steam engineering concepts; (2) boiler fittings; (3) feed-water, steam, and combustion accessories; (4) combustion; (5) boiler-water conditioning; (6) electrical components; (7) pumps; (8) turbines; (9) lubrication; (10) plant operation; (11) service and maintenance; and (12) license preparation. Several diagrams complement the activity units. Numerous engineering drawings are included. (ML)