rankine cycle boilers classification specification fittings accessories fire tube water tube boilers - One Line Questions

1. Which of the following describes a 'water-tube' in a boiler? — A tube through which water and steam circulate
2. Which of the following describes a 'fire-tube' in a boiler? — A tube through which hot combustion gases pass
3. A blow-off cock is used for: — Periodically removing sediment and sludge from the boiler
4. The 'feed check valve' is a fitting that: — Allows feed water to enter the boiler but prevents backflow
5. Which boiler fitting is used to remove soot and ash deposits from the heating surfaces? — Soot blower
6. Which specification is essential for determining the type of fuel handling system required for a boiler? — Type of fuel (solid, liquid, gas)
7. Which specification is crucial for matching a boiler to a specific industrial process demand? — Steam pressure and temperature requirements
8. Which of the following is a specification related to the fuel used in a boiler? — Type of fuel (e.g., coal, gas, oil)
9. Which specification relates to the structural integrity and safety of a boiler? — Maximum allowable working pressure (MAWP)
10. Which accessory helps in recovering waste heat from flue gases to preheat combustion air? — Air preheater
11. Which type of boiler is generally preferred for high-pressure and high-capacity steam generation? — Water-tube boiler
12. The Babcock & Wilcox boiler is a classic example of a: — Water-tube boiler
13. Which type of boiler is designed to operate at pressures above the critical pressure? — Supercritical boiler
14. The 'tube plate' is a critical component in fire-tube boilers, connecting the: — Flue tubes to the boiler shell
15. Boiler efficiency is primarily determined by the ratio of: — Useful heat absorbed by the water/steam to the heat supplied by the fuel
16. Which of the following is a disadvantage of fire-tube boilers compared to water-tube boilers? — Lower efficiency at high pressures
17. A 'steam separator' is an accessory used to: — Remove water droplets from saturated steam
18. The primary function of a safety valve in a boiler is to: — Release excess steam pressure to prevent explosion
19. In a fire-tube boiler, where does the combustion of fuel primarily occur? — Outside the tubes, in the furnace
20. A 'manhole' is a boiler fitting primarily used for: — Inspecting and cleaning the internal parts of the boiler
21. Which statement best describes the Rankine cycle's relevance to boilers? — It is the thermodynamic cycle that the boiler's steam output powers
22. Which type of boiler is commonly used in locomotives? — Locomotive fire-tube boiler
23. Which of the following is a common application for fire-tube boilers? — Industrial heating and process steam
24. What is the main advantage of a water-tube boiler over a fire-tube boiler for high-pressure applications? — Better steam-raising rate and higher pressures achievable
25. What does the 'drum' in a water-tube boiler typically contain? — A mixture of water and steam
26. What is the main hazard associated with operating a boiler without proper water level control? — Overheating and potential explosion
27. A fusible plug is a safety device designed to: — Indicate low water level by melting and releasing steam
28. In a water-tube boiler, the circulation of water is typically: — A combination of natural and forced circulation
29. Which term describes the process of removing dissolved gases from boiler feed water? — Deaeration
30. Which of the following is a characteristic of a 'vertical fire-tube boiler'? — Compact design, suitable for limited space
31. Which boiler fitting is used to control the water level inside the boiler drum? — Water level indicator (gauge glass)
32. What is a key advantage of water-tube boilers for large-scale power generation? — High steam generating capacity and efficiency
33. The 'furnace' or 'combustion chamber' is where: — Fuel is burned to produce heat
34. Which specification determines the physical size and weight of a boiler? — Boiler capacity and pressure rating
35. Which accessory is used to preheat the feed water before it enters the boiler? — Economizer
36. What is a key specification considered when selecting a boiler? — The steam generating capacity (e.g., kg/hr or MW)
37. A 'fire-tube boiler' typically has a lower steam generating capacity compared to a water-tube boiler of similar physical size because: — The heat transfer surface area is less efficient
38. The 'heating surface' of a boiler refers to: — The area exposed to hot flue gases on one side and water/steam on the other
39. Which of the following is the primary distinguishing factor between fire-tube and water-tube boilers? — Whether the hot gases pass through tubes or the water passes through tubes
40. What is the primary function of the 'steam drum' in a water-tube boiler? — To collect steam and separate it from water
41. What is the primary purpose of the refractory lining in a boiler furnace? — To withstand high temperatures and insulate the furnace
42. What is the purpose of 'mud boxes' or 'sediment collectors' in some boiler designs? — To facilitate the removal of sludge and sediment
43. What is the function of a superheater in a boiler system? — To further heat the steam above its saturation temperature
44. What is the purpose of a pressure gauge on a boiler? — To indicate the current steam pressure inside the boiler
45. What is the primary function of a 'steam stop valve' (also known as a main stop valve)? — To isolate the boiler from the steam main
46. What is the function of a 'chimney' or 'stack' in a boiler system? — To discharge flue gases to the atmosphere and provide draft
47. What is the main purpose of the 'grate' in a solid-fuel-fired boiler? — To hold the fuel bed and allow air to pass through for combustion
48. Which of these is NOT a common type of fire-tube boiler? — Babcock & Wilcox boiler
49. A Lancashire boiler is a type of: — Fire-tube boiler
50. Which classification of boiler is typically characterized by a large cylindrical shell with internal furnaces and flue tubes? — Fire-tube boiler
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