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