MD Boiler Operator case studies
MD Boiler Operator · Put your knowledge to work in context.
The Maryland Boiler Operator License Examination is the credentialing pathway for individuals who operate and maintain steam and hot-water boilers in Maryland. It is intended for stationary engineers, building maintenance staff, plant operators, and apprentices who need to demonstrate competence in boiler room work. The MD Boiler Operator case studies are 6 cases and about 4,667 words.
1Adding Load to a Two-Boiler Plant: Capacity, Redundancy, and a Header Pressure Conflict
A food-processing plant runs two 300-hp firetube boilers, each rated 10,350 lb/hr at 212 °F feedwater, 125 psig MAWP, currently operating at 100 psig with 190 °F deaerated feedwater. The steam load is 14,000 lb/hr.
687 words, about 3 min2Two Safety Valves, a Gate Valve, and a Request to Raise Operating Pressure
A 500-hp watertube boiler with a 150 psig MAWP supplies saturated steam at 100 psig. Its drum carries two safety valves.
779 words, about 4 min3High CO at High Fire After a Gas Heating Value Change
A 600-hp packaged watertube boiler fires natural gas through a parallel-position burner. At high fire the portable analyzer at the stack sample port reads 4.5 % O2, 9 % CO2, 520 °F, and 60 ppm CO.
783 words, about 4 min4Hardness Breakthrough, No Surface Blowdown, and a Deaerator That Is Only a Heater
A 30,000 lb/hr watertube boiler at 150 psig returns 60 % condensate; the other 40 % (12,000 lb/hr) is softened make-up. Feedwater total dissolved solids run about 250 ppm and the boiler water limit is 2,500 ppm.
796 words, about 4 min5Low-Water Trip, Water Added to a Hot Boiler, and a Manager Who Wants to Keep It On Line
At 02:10 a 400-hp, 150 psig firetube boiler firing at 70 % tripped on low water. The operator acknowledged the alarm, could not see a level in the gauge glass, decided the glass was 'just reading low,' and opened the feedwater bypass to fill the boiler while it was still hot.
844 words, about 4 min6Proposed Fix for a Firetube Boiler Overpressure and Classification Question
A laundry has a 1970s steel firetube boiler: 200 hp, 15 psig design, currently operating at 12 psig steam. The burner is gas-fired and rated 8,400,000 Btu/hr input.
778 words, about 4 min