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Fuels and Combustion Quiz 9

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Fuels and Combustion Quiz 9

1 / 65

Which of the following petrographic constituents of coal is non-coking ?

2 / 65

Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?

3 / 65

Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant ?

4 / 65

Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O) ?

5 / 65

Which of the following is not used as a binder in coal briquetting ?

6 / 65

Which of the following has the highest flame speed ?

7 / 65

Which of the following is a poisonous fuel gas ?

8 / 65

Which will have the least volatile matter and hence will be the most difficult to ignite ?

9 / 65

Which of the following is the most poisonous gas ?

10 / 65

Which of the following is used for making the explosive ?TNT? ?

11 / 65

Which of the following fuel gases is heavier than air ?

12 / 65

Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?

13 / 65

Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3) ?

14 / 65

Which of the following is not a micro component present in coal ?

15 / 65

With increase in the oxygen content of the coal, its _______ decreases?

16 / 65

Width of the coke oven towards coke side is slightly more than that on pusher side to______?

17 / 65

Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature ?

18 / 65

Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction ?

19 / 65

With increase in the time of carbonisation at a particular temperature (say 1000?C), the _______ percentage in coke oven gas increases?

20 / 65

Yield of coke oven gas in low temperature carbonisation of coal is about _______ Nm3 /ton of dry coal?

21 / 65

Yield of blast furnace gas is about ________ Nm3 /ton of pig iron?

22 / 65

Which of the following is not applicable to fluidised bed combustion of coal ?

23 / 65

Which of the following is not a manufactured fuel ?

24 / 65

Which of the following is called ?blue gas??

25 / 65

Which of the following is not endothermic ?

26 / 65

Which of the following fuels is generally not used in thermal power plant boiler firing ?

27 / 65

Which of the following has the highest gross calorific value ?

28 / 65

Which of the following is coking ?

29 / 65

With increase in moisture content of coal, its_______?

30 / 65

Which of the following is a measure of the agglutinating (i.e., binding) property of coal ?

31 / 65

With increases in carbonisation temperature_________?

32 / 65

Which of the following is not a ?manufactured? fuel ?

33 / 65

Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?

34 / 65

With increase in moisture content of coal, its_____?

35 / 65

Which of the following has the highest heat of combustion ?

36 / 65

Which of the following is a primary fuel ?

37 / 65

Which of the following is not a manufactured fuel ?

38 / 65

Which of the following has the highest calorific value (kcal/Nm3) ?

39 / 65

Yield of pitch from distillation of high temperature tar is around ______ percent?

40 / 65

Which of the following has the highest calorific value ?

41 / 65

Which of the following would require least amount of secondary air for combustion ?

42 / 65

With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion______?

43 / 65

Which of the following is not a by-product recovered in a high temperature coal carbonisation plant ?

44 / 65

Which of the following is not a binder for coal briquetting ?

45 / 65

Which of the following would require maximum amount of % excess air for complete combustion ?

46 / 65

Which of the following is unsuitable fuel for producer gas manufacture ?

47 / 65

Which of the following gaseous fuels is likely to have the highest gross calorific value ?

48 / 65

With increase in the temperature of carbonisation of coal _____?

49 / 65

Which of the following fuel gases has the highest calorific value ?

50 / 65

Which of the following gaseous fuels has the lowest calorific value ?

51 / 65

With increase in calorific value of fuels, their adiabatic flame temperatures___________?

52 / 65

Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?

53 / 65

Which of the following has the least calorific value (kcal/Nm3) ?

54 / 65

Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the______?

55 / 65

White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is__________?

56 / 65

Which of the following fuels is the best for burning on chain grate stoker ?

57 / 65

Which of the following has the highest theoretical flame temperature ?

58 / 65

Which of the following is not a by-product fuel ?

59 / 65

Which of the following is not a by-product fuel ?

60 / 65

With increase in C/H ratio of a fuel, the dew point of flue gases________?

61 / 65

Which of the following has the highest flame velocity ?

62 / 65

Which of the following is a single stage, fixed bed high pressure coal gasification process ?

63 / 65

Which of the following will be unsuitable for dust cleaning from flue gas at 400?C from a pulverised coal fired boiler ?

64 / 65

White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is_______?

65 / 65

Yield of charcoal in high temperature carbonisation of wood is about ______ percent?

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