BD Second Class Boiler Attendant case studies
BD Second Class Boiler Attendant · Put your knowledge to work in context.
The Second Class Boiler Attendant certificate is a Bangladeshi competency credential for people who operate and supervise steam boilers. Holders are typically employed in textile dyeing and finishing plants, rice and sugar mills, food processing, pharmaceuticals, and other process industries where a boiler room runs continuously. The BD Second Class Boiler Attendant case studies are 5 cases and about 2,516 words.
1Low-Water Cut-Out Bypassed During Night Shift
A 12 000 kg/h fire-tube boiler supplies process steam at 8 bar. At 02:40 the low-water cut-out (LWCO) trips and the burner locks out.
613 words, about 3 min2Hydrostatic Test After a Staybolt Repair
A shell boiler with a design pressure of 10 bar has had 12 staybolts replaced in the combustion chamber. The repair was made by a coded welder, and the insurer's inspector has asked for a hydrostatic test before the boiler is returned to service.
419 words, about 2 min3Black Smoke and High Stack Temperature After a Burner Change
A shell boiler rated at 5 000 kg/h has been converted from heavy fuel oil to natural gas. After commissioning, the stack temperature reads 240 °C against 190 °C before conversion, and the boiler is producing dense black smoke at high fire.
531 words, about 3 min4Scale, Priming and Carry-Over on a Softened-Water Boiler
A water-tube boiler producing saturated steam at 12 bar has been showing rising stack temperature, falling steam output, and occasional priming. The feed water is softened but has a total hardness of 15 mg/L as CaCO3, and the boiler water chloride is 900 mg/L against a limit of 300 mg/L.
479 words, about 2 min5Safety Valve Setting and Steam Test After a Superheater Repair
A water-tube boiler with a design pressure of 25 bar has two safety valves: one on the drum and one on the superheater outlet. After repair of the superheater header, the boiler is to have a steam test.
474 words, about 2 min