Fuels and Combustion Quiz 1
1 / 50
A coal having higher volatile matter content, has lower__________?
2 / 50
_____ process is meant for direct hydrogenation of coal to produce liquid fuel?
3 / 50
64-132) rank coal (ASTM) means a coal with 64%_____?
4 / 50
?Wobbe index? is a characteristic of___________?
5 / 50
?Micum Index? of a coke is a measure of its_____?
6 / 50
______ has the widest inflammability limit (explosion limit) of all the gases?
7 / 50
A coal with high ______ content, would ignite most easily?
8 / 50
A coal with high ash content_____?
9 / 50
?Fat coals? are those coals which have very high______?
10 / 50
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the__________?
11 / 50
A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon __________?
12 / 50
A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the ?carpet loss?. The carpet loss may be of the order of _______ cms?
13 / 50
A travelling grate stoker is meant for the efficient burning of _______ coal?
14 / 50
A good coking coal should have high _______ content?
15 / 50
Abrasion index of blast furnace coke should be around ______ percent?
16 / 50
Air/gas ratio for complete combustion will be the highest for___________?
17 / 50
A coal having higher volatile matter content will necessarily have lower______?
18 / 50
______ prohibits the use of alcohols directly in petrol engines ?
19 / 50
______ present in coal is not determined in its ultimate analysis ?
20 / 50
__________ is used as jet engine fuel ?
21 / 50
A coal containing very high percentage of durain is called _______ coal?
22 / 50
?Fuel? can be defined as a substance which produces heat by_____?
23 / 50
Anthracite coal ______?
24 / 50
A gaseous fuel in order to develop luminosity on burning, must contain ___________?
25 / 50
Advantages of fluidised bed combustion are ______?
26 / 50
Ammonia content in raw coke oven gas is about ______ gm/Nm3?
27 / 50
(64-132) rank coal (ASTM) means a coal with 64%_____?
28 / 50
A good metallurgical coke_____?
29 / 50
A coal containing high amount of volatile matter will have___________?
30 / 50
A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas contains 21% CO2. It means that_____?
31 / 50
A fuel with high heat release rate will__________?
32 / 50
A coal having high volatile matter content will _________?
33 / 50
?Fat? coal means a coal having _____?
34 / 50
Abel apparatus is used for those oils, whose flash points are ___________?F?
35 / 50
A coal having high amount of volatile matter______?
36 / 50
A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is__________?
37 / 50
?Wind loss? resulting from unscientific storage of coal may be the order of about ______ percent?
38 / 50
A good quality coal should have _____?
39 / 50
Artificial draught produced by a fan can be controlled by the_____?
40 / 50
About ______ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?
41 / 50
Anthracite can be used for_____?
42 / 50
Actual flame temperature is always lower than the adiabatic flame temperature, because there is_________?
43 / 50
Adiabatic flame temperature of a fuel is dependent on the initial temperature of_____?
44 / 50
______ of the coal is the basis for Seylor?s coal classification?
45 / 50
A coal that softens and fuses on heating is__________?
46 / 50
A particular coal is said to be free burning when it ___________?
47 / 50
?Overfire burning? in a furnace is a phenomenon characterised by the ___________?
48 / 50
A coal with high ash content is undesirable, as_________?
49 / 50
A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having _______?
50 / 50
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be__________?
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