Steam Power Plants Interview Questions:

Following are the below Steam Power Plants Interview Questions and Important Questions which is very useful for interviews and exams

1. Discuss the factors which affect the thermal efficiency of a thermal power station.

2. Discuss why overall efficiency of thermal power plant is very low ?

3. Write different methods which are used for increasing the efficiency of a thermal power station. Explain any one in detail.

4. Discuss the merits and demerits of steam power plants.

5. Discuss the factors to be taken into account while selecting the site for a thermal power station.

6. What are the main considerations for selection of site for a thermal power station ?

7. Draw the schematic diagram of a modern steam power station and explain its operation with its important components.

8. Draw the schematic layout of coal-fired power station. Explain main parts and their working.

9. Justify that thermal power stations are normally located away from the load centers. Draw the feed water and steam flow diagram of a large thermal power station.

10. Draw a general layout of modern thermal power plant and explain the working of different circuits (fuel, air, steam, water, cooling, etc.)

11. Explain with a neat sketch the working of a thermal elec­tric power plant station and explain the functions of major components in it.

12. Draw a labelled schematic diagram of a typical thermal power station. How do you compare thermal plants with hydroelectric plants from the economic point of view.

13. Draw and explain single line diagram of thermal and hydroplants.

14. What are the factors to be considered for selection of site for a thermal power plant 7 Draw a typical layout and explain the working of a plant.

15. Explain the working of stream power station with diagram. What are the important constituents of a steam power station.

16. Describe the use of different parts of a thermal power plant with the help of neat sketch.

17. Explain briefly, the functions of (i) Rchcatcrs (ii) Con­densers, (iii) Cooling towers.

18. Briefly discuss the function of economizer in a thermal power plant.

19. Briefly discuss the function of air preheatcr in a thermal power plant.

20. Give the classification of steam turbines used in power plants.

21. Explain the principle of impulse turbine and how it differs from reaction turbine?

22. What are the different methods of compounding of steam turbines.

23. Explain the various types of nozzles used in steam turbines.

24. Give the classification of coal. On what factors does the selection of coal for a power plant depend ? What type of coal is used in steam power plants? How imported coal is superior to Indian coal ?

25. Draw a neat line diagram of inplant coal handling system and explain the working with neat diagram of equipments used at different stages.

26. Draw a neat line diagram of inplant coal handling system and explain screw conveyors used to transfer the coal.

27. Suggest a coal handling system for a large size thermal plant, located at about 25 km from coal mines.

28. Explain the difference between overfeed and underfeed systems of burning solid coal. Which is preferred for high volatile coal and why ?

29. What are the advantages of mechanical handling of coal ?

30. Explain the working of underfeed stokers with the help of a diagram.

31. Why pulverized fuel is preferred ? What are the types of pulverized fuel burners ?

32. What is pulverized fuel ? Compare the pulverized firing and stoker firing. Discuss the characteristics of bin and unit systems of pulverized fuel firing.

33. Describe briefly with flow sheet the pulverized coal preparation systems and the method of firing of pulverized fuel. Discuss briefly the advantages and disadvantages of pulverized coal firing.

34. Describe different types of burners for pulverized coal firing. How is degree of superheat controlled by tilting burner ?

35. What do you understand by fluidized bed combustion ? Explain working principle with a neat line sketch. What are the major disadvantages of this system over conventional furnace/boiler system ?

36. Briefly discuss the function of pulverizing plant in a thermal power station.

37. Write short notes on ash handling plant and steam turbines.

38. Draw a typical layout of a thermal power plant and describe the function of a coal and ash handling plant.

39. Explain about ash handling waste.

40. Draw a line diagram of pneumatic ash handling system used for steam power plant. Explain its working and difficulties encountered in design.

41. List difficulties encountered in the ash handling plant layout. Mention the places of disposal of ash.

42. What are the principal requirements of an ash handling plant ?

43. How will you classify modern ash handling systems ? Describe each one of them briefly with the help of neat sketches.

44. What are the methods of arresting ash from the flue gases ? Explain any one method.

45. Explain with the help of a line sketch the working of an electrostatic precipitator and give its outstanding features over other collectors.

46. Explain the functions of FD fan and ID fan. What is balanced draught ?

47. Discuss the following in case of steam power plant: (a) Preparation of coal (b) Belt conveyor (c) Electrostatic precipitator (d) Comparison of unit and control systems of pulverized fuel firing.

48. Briefly discuss the functions of economizers, superheaters and boilers in a thermal power plant. What are the draught equipments used in steam power plant ?

49. Explain the process of treatment of feed water. Why is it necessary ? Describe the zeolite process for softening of water.

50. List the typical essential auxiliaries for a unit in a steam station.

51. Discuss the characteristics of any one type of turbo-alter­nators.

52. Write short notes on the following:

• Site selection of thermal power plants.
• Superheater in a boiler.
• Economiser in a boiler.
• Recuperative and regenerative air preheaters.
• Feed water heaters.
• Preparation of fuel for steam power plant.
• Coal handling plant.
• Ash handling.
• Ash disposal and dust collection.
• Dust collectors used in steam power plants.
• Electrostatic precipitator.
• Feedwater treatment.
• Supply to power station auxiliaries.
• Turbo-alternators.