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Power Plant Engineering Practice Test: Combustion Mechanism, Equipment & Firing Methods
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Avg score: 82% Most missed: “Particular coal is said to be free burning when it __________”
Combustion Mechanism, Equipment & Firing Methods topics include: Pulverisation and gasifiers, kinetic and diffusion control and coal firing systems. The combustion mechanism in a power plant involves burning fuels like coal, oil, or gas to generate heat energy. This heat is used to create steam, which drives turbines to generate electricity. The steam is then cooled and condensed back into water, which is reused in the process.  Here's how the combustion mechanism works in different types of power plants: Thermal power plants: Fuels like heavy oil, LNG, and coal are burned inside a boiler... Show more
Power Plant Engineering Practice Test: Combustion Mechanism, Equipment & Firing Methods
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25 Questions

1. Combustion of pulverised coal as compared to that of lump coal __________
2. The maximum adiabatic flame temperature is attained when the fuel is burnt with __________
3. __________ present in coal is not determined in its ultimate analysis.
4. Proximate analysis of coal determines its __________ content.
5. Higher fuel combustion efficiency cannot be achieved by __________
6. Flue gas discharge velocity through chimney of a big thermal power plant may be around __________ m/sec.
7. __________ prohibits the use of alcohols directly in petrol engines.
8. If d is the diffusion coefficient and t is the boundary layer thickness. Then the mass transfer coefficient k is given by?
9. High amount of sulphur and phosphorous in coke causes __________
10. Which of these is the outer most coating in the burning of a coke particle?
11. Abrasion index of blast furnace coke should be around __________ percent.
12. Presence of free moisture in coal is most disadvantageous during __________
13. The decrease in the atomic number is not observed in case of __________
14. Yield of pitch from distillation of high temperature tar is around __________ percent.
15. __________ of the coal is the basis for Seylor’s coal classification.
16. In flue gas analysis by Orsat’s apparatus, carbon dioxide is absorbed by __________
17. _________ has the widest inflammability limit (explosion limit) of all the gases.
18. Particular coal is said to be free burning when it __________
19. Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
20. The cooling medium used in dry quenching of coke is __________
21. Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the __________
22. Caking index of the coal blend used for the manufacture of metallurgical coke should be around __________
23. Which of the following is the maximum coal producing state in India?
24. Gobar gas is produced by the __________ of ‘gobar’ (cow dung).
25. ‘Fat’ coal means a coal having __________