100+ Free BD Second Class Boiler Attendant Practice Questions

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Bangladesh First Class Boiler Attendant Certificate of Competency

Practice Questions100 questions

Sample BD Second Class Boiler Attendant Practice Questions

Try these sample questions to test your BD Second Class Boiler Attendant exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the main job of an industrial steam boiler?

A.To convert water into steam by applying heat

B.To compress air for pneumatic tools

C.To cool hot process water before discharge

D.To store fuel oil under pressure

Explanation: A boiler is a closed vessel in which heat from fuel combustion or another heat source is transferred to water to produce steam under pressure. A second-class attendant should first understand this basic purpose before studying fittings and procedures.

2In a fire-tube boiler, where do the hot combustion gases flow?

A.Inside tubes surrounded by water

B.Inside the feed-water pipe only

C.Through the safety valve body

D.Only around the outside of the chimney

Explanation: In a fire-tube boiler, hot gases pass through tubes fitted inside a water-filled shell. Heat passes through the tube metal to the surrounding water and makes steam.

3In a water-tube boiler, what flows inside the tubes?

A.Water and steam

B.Fuel oil

C.Combustion gases only

D.Ash and soot

Explanation: A water-tube boiler circulates water and steam inside tubes while hot gases pass around the tubes. This is the opposite of the fire-tube arrangement.

4What is the furnace of a boiler used for?

A.Burning fuel with air to produce heat

B.Measuring the water level

C.Removing dissolved salts from feed water

D.Storing dry steam before use

Explanation: The furnace is the space where fuel burns with air and releases heat. That heat then passes to the boiler water through heating surfaces.

5Which part of a boiler shell normally contains water and steam under pressure?

A.The pressure vessel or drum

B.The ash pit only

C.The chimney stack

D.The fuel storage tank

Explanation: The shell or drum is the pressure-retaining part that contains water, steam, or both. Because it is under pressure, its condition and fittings are central to safe operation.

6What is meant by boiler heating surface in basic boiler practice?

A.The metal surface through which heat passes from hot gases to water

B.The outside floor area of the boiler room

C.The painted surface of the boiler casing

D.The area of the coal storage yard

Explanation: Heating surface is the effective metal area exposed to hot gases on one side and water or steam on the other. Bangladesh licence limits also use heating surface, so attendants must understand the term.

7Which fitting gives access for cleaning small areas of a boiler shell or tube plate?

A.Handhole cover

B.Steam stop valve

C.Pressure gauge siphon

D.Chimney damper

Explanation: A handhole is a small removable cover that allows inspection and cleaning access. It is simpler and smaller than a manhole, but it is still part of maintenance access.

8Why must boiler plates, tubes and seams be kept free from serious corrosion?

A.Corrosion weakens pressure parts and can lead to leakage or rupture

B.Corrosion improves heat transfer by roughening the metal

C.Corrosion reduces the need for water treatment

D.Corrosion automatically lowers boiler pressure safely

Explanation: Pressure parts must remain strong enough to contain steam and water safely. Corrosion removes metal thickness, increasing the risk of leakage, bulging, or rupture.

9Which statement best describes a boiler mounting?

A.A fitting attached to the boiler for safe control, indication, or operation

B.A decorative frame around the boiler room door

C.A separate machine used only to grind coal

D.A foundation bolt that has no operating function

Explanation: Boiler mountings are fittings such as safety valves, water gauges, pressure gauges, stop valves and feed check valves. They help the attendant control and observe the boiler safely.

10Why should soot be removed from fire-side heating surfaces?

A.Soot acts as insulation and reduces heat transfer

B.Soot increases boiler efficiency by trapping heat inside the furnace

C.Soot purifies the feed water

D.Soot strengthens boiler tubes from the outside

Explanation: A soot layer resists heat flow from hot gases to the metal surface. Removing soot helps maintain efficiency and prevents overheating of fire-side surfaces.

About the BD Second Class Boiler Attendant Exam

The Bangladesh Second Class Boiler Attendant Certificate of Competency, issued by the Office of the Chief Inspector of Boilers, qualifies the holder under the Boiler Act, 2022 transitional provisions as equivalent to a Grade-3 boiler operation licence for boiler sets with heating surface not exceeding 1,500 square feet. The official certificate-conditions page lists minimum age 21, at least 3 years of experience as an assistant boiler operator, Bangladeshi citizenship, supporting documents and a historical BDT 500 challan fee; candidates should confirm current rules and fees with the office.

Assessment

Certificate of Competency examination administered by the Office of the Chief Inspector of Boilers' Board of Examiners under the Boiler Act, 2022 and Boiler Rules, 2025. Under the Act's transitional provisions, an existing Second Class Boiler Attendant certificate is treated as equivalent to a Grade-3 boiler operation licence, authorising operation of a single, separate or connected boiler set with heating surface not exceeding 1,500 square feet. The public office pages do not publish a detailed written-exam syllabus, so this practice bank is pitched below first-class scope and emphasizes basic boiler operation, firing, water level, mountings, safety and legal duties.

Time Limit

No fixed time limit for the Second Class Boiler Attendant examination is published by the Office of the Chief Inspector of Boilers. Confirm session arrangements with your regional Deputy Chief Boiler Inspector's office.

Passing Score

The Board of Examiners has not published a fixed numerical pass percentage for this certificate examination. Confirm the current passing standard with the Office of the Chief Inspector of Boilers before your exam.

Exam Fee

The Office of the Chief Inspector of Boilers has historically required a treasury challan fee of BDT 500 for the Second Class Boiler Attendant certificate application, paid to bank account/khat no. 1-3931-0000-2031. Confirm the current fee and payment channel before applying, as fees change periodically. (Office of the Chief Inspector of Boilers, Bangladesh, Ministry of Industries)

BD Second Class Boiler Attendant Exam Content Outline

12%

Basic Boiler Construction

Basic purpose of steam boilers, fire-tube and water-tube arrangements, furnace, shell/drum, heating surface, inspection openings, soot and insulation.

14%

Combustion and Firing

Fire triangle, air supply, draught, smoke, hand firing, burner light-up, flame failure, excess air, fuel leaks and ash handling.

18%

Boiler Operation and Watchkeeping

Routine shift checks, log books, cold start, raising steam, handover, pressure observation, standby firing, shutdown and housekeeping.

16%

Water Level and Feed Water

Gauge glass use, low and high water, feed pumps, feed check valves, priming, foaming, shrink and swell, and feed-water contamination.

16%

Mountings and Safety Devices

Safety valves, pressure gauges, gauge glass protection, steam stop valves, blow-down valves, fusible plugs, low-water alarms and routine fitting checks.

Basic Water Treatment and Blowdown

Hardness, scale, sludge, bottom blow-down, chemical treatment, dissolved oxygen and signs of dirty or foaming boiler water.

Emergencies and Workplace Safety

Low-water response, safety-valve lifting, PPE, steam leaks, confined-space entry, accident reporting, fire prevention and safe leak checking.

Boiler Act and Certificate Duties

Boiler Act 2022 Grade-3 equivalence, 1,500 sq ft heating-surface limit, second-class eligibility, historical fee, administrator and licence validity.

How to Pass the BD Second Class Boiler Attendant Exam

What You Need to Know

Passing score: The Board of Examiners has not published a fixed numerical pass percentage for this certificate examination. Confirm the current passing standard with the Office of the Chief Inspector of Boilers before your exam.
Assessment: Certificate of Competency examination administered by the Office of the Chief Inspector of Boilers' Board of Examiners under the Boiler Act, 2022 and Boiler Rules, 2025. Under the Act's transitional provisions, an existing Second Class Boiler Attendant certificate is treated as equivalent to a Grade-3 boiler operation licence, authorising operation of a single, separate or connected boiler set with heating surface not exceeding 1,500 square feet. The public office pages do not publish a detailed written-exam syllabus, so this practice bank is pitched below first-class scope and emphasizes basic boiler operation, firing, water level, mountings, safety and legal duties.
Time limit: No fixed time limit for the Second Class Boiler Attendant examination is published by the Office of the Chief Inspector of Boilers. Confirm session arrangements with your regional Deputy Chief Boiler Inspector's office.
Exam fee: The Office of the Chief Inspector of Boilers has historically required a treasury challan fee of BDT 500 for the Second Class Boiler Attendant certificate application, paid to bank account/khat no. 1-3931-0000-2031. Confirm the current fee and payment channel before applying, as fees change periodically.

Keys to Passing

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BD Second Class Boiler Attendant Study Tips from Top Performers

1Start with water level, gauge glass checks, feed-water supply and low-water response, because these are the highest-risk daily duties for a second-class boiler attendant.

2Practise identifying each basic mounting by function: safety valve for overpressure, gauge glass for water level, pressure gauge for steam pressure, feed check valve for feed-water entry and blow-down valve for sludge removal.

3Keep second-class scope practical: know safe light-up, firing, draught, smoke, shift logs, blow-down and shutdown before spending time on advanced first-class topics such as detailed superheater design.

4Read the Boiler Act, 2022 licence-grade limits and the official certificate-conditions page so you can distinguish Second Class or Grade-3 duties from First Class or Grade-2 scope.

Frequently Asked Questions

Who awards the Second Class Boiler Attendant Certificate of Competency in Bangladesh?

The Office of the Chief Inspector of Boilers, under Bangladesh's Ministry of Industries, awards the Second Class Boiler Attendant certificate through its Board of Examiners and regional offices.

What does the Second Class Boiler Attendant certificate authorize under current Bangladesh law?

Under the Boiler Act, 2022 transitional provisions, an existing Second Class Boiler Attendant certificate is treated as equivalent to a Grade-3 boiler operation licence for a single, separate or connected boiler set with heating surface not exceeding 1,500 square feet.

What eligibility is publicly listed for Second Class Boiler Attendant applicants?

The official certificate-conditions page lists minimum age 21, at least 3 years of experience as an assistant boiler operator, Bangladeshi citizenship, experience certificates showing boiler registration number, age proof, citizenship and character certificate, photographs and the prescribed challan fee.

How many questions are in this practice bank and what topics does it cover?

This free bank has 100 multiple-choice questions covering basic boiler construction, combustion and firing, operation and watchkeeping, water level and feed water, mountings and safety devices, blow-down, emergencies, workplace safety and Boiler Act duties.

Is the official Second Class Boiler Attendant exam format published?

The Office of the Chief Inspector of Boilers has not published a detailed question count, time limit or numerical pass mark for this certificate examination. This practice bank focuses on the basic technical and regulatory knowledge candidates are expected to revise.