BD First Class Boiler Attendant study guide
BD First Class Boiler Attendant · Work through your exam, one topic at a time.
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 study guide has 10 sections and about 3,014 words.
01Boiler Laws, Rules and Regulations
A First Class candidate must be able to place the boiler laws of their jurisdiction in context: the principal Act, the regulations made under it, the code or standard that governs construction (for example an ASME-type code), and the adopted rules for operation and inspection. Understand who the authority is, what a certificate of competency authorises, how registration and periodic inspection are enforced, and what duties fall on the owner, the operator and the inspector separately.
358 words, about 2 min02Boiler Types, Construction and Design
Candidates should be able to classify boilers several ways at once: by firing (solid, liquid, gaseous), by construction (fire-tube, water-tube), by circulation (natural, forced, once-through), by pressure (low, medium, high), and by use (process, power, marine). Know the fire-tube family (horizontal return tubular, packaged Scotch, locomotive, vertical) and the water-tube family (straight-tube, bent-tube, D-type, Stirling).
335 words, about 2 min03Boiler Fittings, Mountings and Accessories
A candidate must distinguish mountings, which are essential for safe operation and are fitted directly to the boiler, from accessories, which improve performance and are usually external. Mountings include safety valves, main steam stop valve, feed check valve, water level gauges, pressure gauge, blowdown valves, fusible plugs, low-water alarms and cut-outs, and the nameplate.
336 words, about 2 min04Fuels, Combustion and Firing Equipment
Understand the composition of solid, liquid and gaseous fuels: carbon, hydrogen, sulphur, moisture and ash. Know the meaning of calorific value (gross and net), volatile matter, fixed carbon and ash fusion temperature.
318 words, about 2 min05Boiler Operation, Starting Up and Shutting Down
Understand the sequence: confirm the boiler is filled to the correct level, check all mountings, prove gauge glasses, ensure vents and drains are open, purge the furnace, then light the burner or fire. Warm through slowly to avoid thermal stress.
332 words, about 2 min06Feedwater Treatment and Water Chemistry
Understand the three main problems: scale, corrosion and carryover. Scale forms from hardness salts (calcium and magnesium) and insulates the metal, causing overheating and tube failure.
240 words, about 1 min07Steam, Feedwater and Auxiliary Systems
Understand the properties of saturated and superheated steam, and the meaning of dryness fraction. Know how steam traps work (thermodynamic, thermostatic, float) and why they are needed to remove condensate and air.
273 words, about 1 min08Boiler Inspection, Testing and Maintenance
Understand the difference between external inspection while the boiler is in service and internal inspection when it is shut down and opened. Know what the inspector looks for: scale, corrosion, cracking, bulging, stay condition, tube ends, firebox condition and safety valve condition.
267 words, about 1 min09Safety, Emergencies and Accident Prevention
Understand the main hazards: overpressure, low water, furnace explosion, water hammer, steam leaks, burns, confined spaces and electrical equipment. Know the protective devices: safety valves, low-water cut-outs, flame failure devices, pressure switches and relief valves.
266 words, about 1 min10Instrumentation, Controls and Efficiency
Understand the pressure gauge, water level gauge, thermometer, flow meter and draught gauge. Know how a pressure gauge is calibrated and why a siphon and cock are fitted.
289 words, about 1 min