BD First Class Boiler Attendant case studies
BD First Class Boiler Attendant · Put your knowledge to work in context.
The First Class Boiler Attendant certificate is the highest grade of boiler operating competency issued in Bangladesh. It is intended for engineers and senior operators who already hold a lower-class certificate and have the practical operating experience the licensing authority requires, and who want to take charge of high-capacity, high-pressure steam plants. The BD First Class Boiler Attendant case studies are 5 cases and about 4,384 words.
1Low Water Cutoff Bypassed During High Demand
You are the shift engineer at a 12,000 kg/h packaged fire-tube boiler supplying a food-processing plant. The boiler is rated at 10 barg and operates with a low-water cutoff (LWCO) of the float type.
714 words, about 4 min2Boiler Tube Failure Due to Overheating: Root Cause Analysis
A 20,000 kg/h water-tube boiler has been in service for 15 years. During a routine inspection, a bulged and cracked tube is found in the generating bank near the burner.
727 words, about 4 min3Safety Valve Sizing and Set Pressure Verification
You are the chief engineer at a facility with a 10,000 kg/h saturated steam boiler rated at 12 barg design pressure. The boiler is equipped with two safety valves: one with a set pressure of 13.5 barg and another with a set pressure of 14.0 barg.
825 words, about 4 min4Combustion Efficiency and Excess Air Optimization
A 5 MW fire-tube boiler burns natural gas (93% methane, 5% ethane, 2% nitrogen by volume) and operates at 8 barg. The boiler has a stack temperature of 240°C and a flue gas oxygen content of 8% (dry basis).
1,186 words, about 6 min5Boiler Inspection Findings: Cracked Shell and Deferred Maintenance
During an internal inspection of a 30-year-old, 15,000 kg/h fire-tube boiler, the authorized inspector finds a 150 mm long crack in the shell near the rear tubesheet, along with significant pitting (depth 2 mm) and a 1.5 mm scale layer on the fireside. The boiler operates at 10 barg and has a history of poor water treatment: the softener has been out of service for 6 months, and the oxygen scavenger feed has been intermittent.
932 words, about 5 min