Fuels and Combustion Quiz 9
1 / 65
With increases in carbonisation temperature_________?
2 / 65
Which of the following is not a by-product fuel ?
3 / 65
Which of the following gaseous fuels is likely to have the highest gross calorific value ?
4 / 65
Which of the following has the least calorific value (kcal/Nm3) ?
5 / 65
With increase in the time of carbonisation at a particular temperature (say 1000?C), the _______ percentage in coke oven gas increases?
6 / 65
Which of the following will be unsuitable for dust cleaning from flue gas at 400?C from a pulverised coal fired boiler ?
7 / 65
Which of the following is not a ?manufactured? fuel ?
8 / 65
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal ?
9 / 65
Which of the following is coking ?
10 / 65
Which of the following gaseous fuels has the lowest calorific value ?
11 / 65
Which of the following is called ?blue gas??
12 / 65
Which of the following is not a micro component present in coal ?
13 / 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_______?
14 / 65
Which of the following has the highest theoretical flame temperature ?
15 / 65
With increase in moisture content of coal, its_____?
16 / 65
Which of the following would require maximum amount of % excess air for complete combustion ?
17 / 65
Which of the following is not a binder for coal briquetting ?
18 / 65
Which of the following is not a manufactured fuel ?
19 / 65
Which of the following fuel gases has the highest calorific value ?
20 / 65
With increase in C/H ratio of a fuel, the dew point of flue gases________?
21 / 65
Which of the following is a primary fuel ?
22 / 65
Which of the following is a single stage, fixed bed high pressure coal gasification process ?
23 / 65
Which will have the least volatile matter and hence will be the most difficult to ignite ?
24 / 65
Which of the following is a measure of the agglutinating (i.e., binding) property of coal ?
25 / 65
Yield of charcoal in high temperature carbonisation of wood is about ______ percent?
26 / 65
27 / 65
Which of the following has the highest gross calorific value ?
28 / 65
Which of the following has the highest calorific value (kcal/Nm3) ?
29 / 65
Which of the following has the highest flame speed ?
30 / 65
Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature ?
31 / 65
Which of the following is not applicable to fluidised bed combustion of coal ?
32 / 65
Which of the following has the highest heat of combustion ?
33 / 65
Width of the coke oven towards coke side is slightly more than that on pusher side to______?
34 / 65
Which of the following is used for making the explosive ?TNT? ?
35 / 65
With increase in calorific value of fuels, their adiabatic flame temperatures___________?
36 / 65
Which of the following is a poisonous fuel gas ?
37 / 65
Which of the following is unsuitable fuel for producer gas manufacture ?
38 / 65
Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?
39 / 65
Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?
40 / 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__________?
41 / 65
Yield of blast furnace gas is about ________ Nm3 /ton of pig iron?
42 / 65
Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O) ?
43 / 65
Which of the following is not endothermic ?
44 / 65
With increase in the temperature of carbonisation of coal _____?
45 / 65
With increase in moisture content of coal, its_______?
46 / 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______?
47 / 65
Yield of pitch from distillation of high temperature tar is around ______ percent?
48 / 65
Which of the following is the most poisonous gas ?
49 / 65
Yield of coke oven gas in low temperature carbonisation of coal is about _______ Nm3 /ton of dry coal?
50 / 65
Which of the following fuels is generally not used in thermal power plant boiler firing ?
51 / 65
Which of the following petrographic constituents of coal is non-coking ?
52 / 65
Which of the following fuel gases is heavier than air ?
53 / 65
With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion______?
54 / 65
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?
55 / 65
56 / 65
Which of the following reactions occuring during coal gasification is called the Neumann reversal reaction ?
57 / 65
Which of the following is not a by-product recovered in a high temperature coal carbonisation plant ?
58 / 65
Which of the following fuels is the best for burning on chain grate stoker ?
59 / 65
Which of the following is not used as a binder in coal briquetting ?
60 / 65
With increase in the oxygen content of the coal, its _______ decreases?
61 / 65
Which of the following has the highest flame velocity ?
62 / 65
Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant ?
63 / 65
Which of the following would require least amount of secondary air for combustion ?
64 / 65
Which of the following has the highest calorific value ?
65 / 65
Which of the following gaseous fuels has the highest net calorific value (kcal/Nm3) ?
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