Fuels and Combustion Quiz 1
1 / 50
A coal with high ______ content, would ignite most easily?
2 / 50
__________ is used as jet engine fuel ?
3 / 50
______ has the widest inflammability limit (explosion limit) of all the gases?
4 / 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__________?
5 / 50
A particular coal is said to be free burning when it ___________?
6 / 50
A coal containing high amount of volatile matter will have___________?
7 / 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__________?
8 / 50
A coal having high volatile matter content will _________?
9 / 50
Ammonia content in raw coke oven gas is about ______ gm/Nm3?
10 / 50
______ of the coal is the basis for Seylor?s coal classification?
11 / 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 _______?
12 / 50
Anthracite coal ______?
13 / 50
?Fuel? can be defined as a substance which produces heat by_____?
14 / 50
64-132) rank coal (ASTM) means a coal with 64%_____?
15 / 50
______ present in coal is not determined in its ultimate analysis ?
16 / 50
?Fat coals? are those coals which have very high______?
17 / 50
Abel apparatus is used for those oils, whose flash points are ___________?F?
18 / 50
A coal having higher volatile matter content, has lower__________?
19 / 50
?Micum Index? of a coke is a measure of its_____?
20 / 50
A gaseous fuel in order to develop luminosity on burning, must contain ___________?
21 / 50
Artificial draught produced by a fan can be controlled by the_____?
22 / 50
______ prohibits the use of alcohols directly in petrol engines ?
23 / 50
?Wobbe index? is a characteristic of___________?
24 / 50
Actual flame temperature is always lower than the adiabatic flame temperature, because there is_________?
25 / 50
(64-132) rank coal (ASTM) means a coal with 64%_____?
26 / 50
About ______ Nm3 of air will be required for the complete combustion of 2Nm3 of CO?
27 / 50
A good quality coal should have _____?
28 / 50
Anthracite can be used for_____?
29 / 50
A coal having high amount of volatile matter______?
30 / 50
A travelling grate stoker is meant for the efficient burning of _______ coal?
31 / 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__________?
32 / 50
A good metallurgical coke_____?
33 / 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 __________?
34 / 50
A good coking coal should have high _______ content?
35 / 50
?Wind loss? resulting from unscientific storage of coal may be the order of about ______ percent?
36 / 50
A coal containing very high percentage of durain is called _______ coal?
37 / 50
A fuel with high heat release rate will__________?
38 / 50
_____ process is meant for direct hydrogenation of coal to produce liquid fuel?
39 / 50
?Overfire burning? in a furnace is a phenomenon characterised by the ___________?
40 / 50
A coal having higher volatile matter content will necessarily have lower______?
41 / 50
A coal with high ash content_____?
42 / 50
Advantages of fluidised bed combustion are ______?
43 / 50
Abrasion index of blast furnace coke should be around ______ percent?
44 / 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?
45 / 50
Adiabatic flame temperature of a fuel is dependent on the initial temperature of_____?
46 / 50
A coal that softens and fuses on heating is__________?
47 / 50
Air/gas ratio for complete combustion will be the highest for___________?
48 / 50
?Fat? coal means a coal having _____?
49 / 50
A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas contains 21% CO2. It means that_____?
50 / 50
A coal with high ash content is undesirable, as_________?
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