Fuels and Combustion Quiz 6
1 / 50
Octane number of 2, 2, 4 ? trimethyl pentane is ___________?
2 / 50
Oxygen required for theoretically complete combustion of 1 Nm3 methane is _______ Nm3?
3 / 50
Presence of free moisture in coal during its high temperature carbonisation _______?
4 / 50
Naphthalene recovered from coke oven gas is used_____?
5 / 50
Pick out the wrong statement ?
6 / 50
Natural draught produced by a chimney depends upon the _______?
7 / 50
Nitrogen in coal__________?
8 / 50
Presence of _______ in a dry gaseous fuel does not contribute to its calorific value?
9 / 50
Out of the following, which is the most important parameter for the blast furnace grade coke ?
10 / 50
Producer gas containing least amount of tar is produced by the__________?
11 / 50
12 / 50
Percentage of carbon monoxide in blast furnace gas may be around ______ ?
13 / 50
Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around _______ percent?
14 / 50
15 / 50
16 / 50
Percentage of hydrogen in coke oven gas may be around _____?
17 / 50
Number of macrocomponents present in coal according to Stopes are _____?
18 / 50
Preheating of _______ the flame temperature?
19 / 50
Presence of free moisture in coal is most disadvantageous during__________?
20 / 50
Preheating of coal charge for the coke ovens reduces the ___________?
21 / 50
22 / 50
Preheating of combustion air is done to _____?
23 / 50
One kg of carbon for theoretically complete combustion requires _______ kg of air?
24 / 50
Percentage of nitrogen in blast furnace gas may be around___________?
25 / 50
Pick out the correct statement ?
26 / 50
27 / 50
Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its _____?
28 / 50
Presence of nitrogen in combustion air does not reduce the ______?
29 / 50
Power alcohol as compared to straight run gasoline has lower _________?
30 / 50
31 / 50
Oxygen percentage (by weight) in atmospheric air is__________?
32 / 50
33 / 50
Naphthalene is used for making__________?
34 / 50
Preheating of a gaseous fuel results in increased______?
35 / 50
Orsat apparatus___________?
36 / 50
Narrow coke ovens as compared to wider coke ovens__________?
37 / 50
Producer gas comprises mainly of _________?
38 / 50
Pick the odd man out?
39 / 50
Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_______?
40 / 50
Orsat apparatus is meant for _____?
41 / 50
Net calorific value is the gross calorific value less the ________ heat of water in the product of combustion when cooled to 15?C ?
42 / 50
Percentage of methane in coke oven gas may be around _______?
43 / 50
Out of the following fuels, the difference between gross and net calorific value will be minimum in case of_____?
44 / 50
Pensky-Marten apparatus is used for those oils, whose flash points are ______ ?F?
45 / 50
Presence of phosphorous in metallurgical coal___________?
46 / 50
Prime coking coal is always blended with medium or non- coking coal before carbonisation___________?
47 / 50
Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about ________ percent?
48 / 50
Natural draft created by the chimney depends upon _______?
49 / 50
Presence of force moisture in coal is most disadvantageous during its ___________?
50 / 50
Out of the following fuels, the difference between the net and gross calorific value is maximum in case of__________?
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