Upon taking over a shift, receives operating instructions from outgoing shift engineer; Inspects boiler room gauges, indicators, charts and records of operation, and the actual operating of the boiler room mechanical equipment and boilers, and issues any necessary instructions to subordinate(s); Acts similarly in regard to generating equipment if any; Makes various periodic and special tests and checks of facilities and equipment, making necessary adjustments; Maintains and repairs mechanical equipment, including tightening loose bearings, packing glands, and bolts, replacing wearing rings, replacing and repacking condenser tubes, renewing gaskets, renewing valves and stuffing boxes, and renewing value parts; Inspects operation of, maintains and repairs generating equipment, ice machinery, hot water heaters, laundry equipment, pumps, fans, compressors, electronic equipment, and other miscellaneous mechanical service equipment; Makes or supervises the making of simple boiler water analyses and determines necessary treatment; Calculates and records operating data; Performs minor tests for fuel specific gravity and gas leaks; Adds water treatment chemicals to boilers; May assist in general building maintenance and repair; May inspect and repair steam traps fed by main system at various locations; May remove pipe insulation materials associated with the repair of pipes and fittings using OSHA approved methods; Performs related duties as required. As engineer in charge of a heating plant and related minor utilities: Performs and supervises maintenance and repair of boiler and boiler room equipment including feed pumps and fuel injectors or stokers; Supervises tending of boiler by others, issuing instructions, inspecting condition of equipment, and checking gauges and operation records; Performs related duties as required.