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Fuels and Combustion Quiz 6

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Fuels and Combustion Quiz 6

1 / 50

Pitch creosote mixture (PCM) as compared to furnace oil is a better fuel, because its _____?

2 / 50

Natural draft created by the chimney depends upon _______?

3 / 50

Preheating of a gaseous fuel results in increased______?

4 / 50

Out of the following fuels, the difference between the net and gross calorific value is maximum in case of__________?

5 / 50

Presence of phosphorous in metallurgical coal___________?

6 / 50

Pick out the wrong statement ?

7 / 50

Presence of free moisture in coal during its high temperature carbonisation _______?

8 / 50

Pick out the correct statement ?

9 / 50

Pick out the wrong statement ?

10 / 50

Out of the following, which is the most important parameter for the blast furnace grade coke ?

11 / 50

Number of macrocomponents present in coal according to Stopes are _____?

12 / 50

Narrow coke ovens as compared to wider coke ovens__________?

13 / 50

Prime coking coal is always blended with medium or non- coking coal before carbonisation___________?

14 / 50

Naphthalene is used for making__________?

15 / 50

Pick out the wrong statement ?

16 / 50

Naphthalene recovered from coke oven gas is used_____?

17 / 50

Presence of free moisture in coal is most disadvantageous during__________?

18 / 50

Percentage of methane in coke oven gas may be around _______?

19 / 50

Net calorific value is the gross calorific value less the ________ heat of water in the product of combustion when cooled to 15?C ?

20 / 50

Pick out the wrong statement ?

21 / 50

Orsat apparatus is meant for _____?

22 / 50

Pensky-Marten apparatus is used for those oils, whose flash points are ______ ?F?

23 / 50

Pick out the wrong statement ?

24 / 50

Producer gas comprises mainly of _________?

25 / 50

Pick out the wrong statement ?

26 / 50

Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about ________ percent?

27 / 50

Oxygen percentage (by weight) in atmospheric air is__________?

28 / 50

Presence of nitrogen in combustion air does not reduce the ______?

29 / 50

Pick out the wrong statement ?

30 / 50

Octane number of 2, 2, 4 ? trimethyl pentane is ___________?

31 / 50

Orsat apparatus___________?

32 / 50

Preheating of _______ the flame temperature?

33 / 50

Producer gas containing least amount of tar is produced by the__________?

34 / 50

Pick the odd man out?

35 / 50

Oxygen content in a flue gas was found to be 4%. It implies that excess air used for combustion was around _______ percent?

36 / 50

Preheating of combustion air is done to _____?

37 / 50

Power alcohol as compared to straight run gasoline has lower _________?

38 / 50

Nitrogen in coal__________?

39 / 50

Out of the following fuels, the difference between gross and net calorific value will be minimum in case of_____?

40 / 50

Percentage of carbon monoxide in blast furnace gas may be around ______ ?

41 / 50

Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_______?

42 / 50

Oxygen required for theoretically complete combustion of 1 Nm3 methane is _______ Nm3?

43 / 50

Preheating of coal charge for the coke ovens reduces the ___________?

44 / 50

Presence of _______ in a dry gaseous fuel does not contribute to its calorific value?

45 / 50

Percentage of hydrogen in coke oven gas may be around _____?

46 / 50

Pick out the wrong statement ?

47 / 50

Natural draught produced by a chimney depends upon the _______?

48 / 50

One kg of carbon for theoretically complete combustion requires _______ kg of air?

49 / 50

Percentage of nitrogen in blast furnace gas may be around___________?

50 / 50

Presence of force moisture in coal is most disadvantageous during its ___________?

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