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100+ Free BD First Class Boiler Attendant Practice Questions
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Sample BD First Class Boiler Attendant Practice Questions
Try these sample questions to test your BD First 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.
1In a fire-tube boiler, how do the hot combustion gases and water relate to each other?
A.Hot gases pass through tubes surrounded by water
B.Water passes through tubes surrounded by hot gases
C.Water and gases mix directly inside the shell
D.Gases flow outside the shell while water flows inside tubes
Explanation: In a fire-tube boiler (such as a Lancashire or locomotive type), the hot flue gases pass through tubes that are immersed in a water-filled shell, transferring heat through the tube walls to the surrounding water.
2In a water-tube boiler, which fluid flows inside the tubes?
A.Water and steam
B.Combustion gases only
C.Compressed air
D.Lubricating oil
Explanation: A water-tube boiler is built so that water (and the steam it generates) circulates inside the tubes, while the hot combustion gases pass around the outside of the tubes to transfer heat inward.
3What is the primary purpose of a boiler's furnace?
A.To store feed water
B.To provide space for fuel combustion and generate hot gases
C.To measure steam pressure
D.To filter impurities from steam
Explanation: The furnace is the enclosed space in a boiler where fuel is burned with air to release heat, producing the hot combustion gases that transfer their heat to the boiler water.
4Which boiler mounting allows a person to enter a large boiler shell for internal inspection and cleaning?
A.Fusible plug
B.Manhole
C.Blow-down valve
D.Economiser
Explanation: A manhole is a sizeable opening fitted with a strong cover on the boiler shell that is large enough for a person to enter for internal inspection, cleaning, and maintenance.
5Under Bangladesh's Boiler Act, 2022, a "boiler" is legally defined as a closed vessel used to generate steam from water under pressure, with a water-holding capacity exceeding what minimum volume?
A.10 litres
B.25 litres
C.50 litres
D.100 litres
Explanation: Section 2 of the Boiler Act, 2022 defines a boiler as a closed vessel or container with a water-holding capacity of more than 25 litres, used solely to produce steam from water, where the steam produced is wholly or partly under pressure due to obstructed flow.
6Which of the following is classified as a boiler component (rather than a separate machine) under the Boiler Act, 2022 definition of "boiler component"?
A.Feed water pump motor
B.Superheater
C.Coal conveyor belt
D.Workshop overhead crane
Explanation: Section 2 of the Boiler Act, 2022 lists items such as plates, tubes, steam pipes, feed pipes, steam/water/mud drums, the furnace, stop and safety valves, manholes, economisers, superheaters, air preheaters, and heat exchangers as boiler components.
7What is the main advantage of a water-tube boiler over a fire-tube boiler of similar size?
A.Simpler construction with fewer joints
B.Ability to generate steam at higher pressure and faster rate
C.Lower cost of manufacture
D.No need for a feed water pump
Explanation: Because the water and steam are confined in relatively small-diameter tubes rather than a large shell, water-tube boilers can safely withstand higher pressures and respond faster to load changes, making them suited to high-pressure, high-capacity applications.
8Which small boiler type generates steam by passing electric current directly through the boiler water, as classified under Bangladesh's Boiler Rules, 2025?
A.Packaged boiler
B.Field-erected boiler
C.Electrode boiler
D.Economiser boiler
Explanation: The Boiler Rules, 2025 define an electrode boiler as a boiler that uses electric current passed through the boiler water itself to generate steam, capped at 300 litres water capacity and 7 kg/cm2 operating pressure with a 10-year designated lifespan.
9Under the Boiler Rules, 2025 classification, what is the maximum water-holding capacity permitted for an electrode boiler?
A.100 litres
B.300 litres
C.500 litres
D.1,000 litres
Explanation: The Boiler Rules, 2025 cap electrode boilers at a maximum water capacity of 300 litres and an operating pressure of 7 kg/cm2, with a 10-year designated lifespan.
10Which type of industrial boiler under Bangladesh's Boiler Rules, 2025 is assembled at the manufacturer's factory before being transported to site?
A.Field-erected boiler
B.Packaged boiler
C.Small industrial boiler
D.Electrode boiler
Explanation: A packaged boiler is fully assembled and tested at the manufacturer's factory and then shipped as a complete unit to the installation site, unlike a field-erected boiler which is built on site.
About the BD First Class Boiler Attendant Practice Questions
Verified exam format metadata for Bangladesh First Class Boiler Attendant Certificate of Competency is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.