20251. Broad System of Ordering is a classification system or switching language developed by:
20252. White flue gas (resembling steam) coming out of the chimney of a thermal power plant indicates that the fuel used in the boiler furnace is
20253. Too much of excess air in combustion results in high
20254. A fuel with high heat release rate will
20255. Coke compared to the coal from which it has been made, contains
20256. A gaseous fuel in order to develop luminousity on burning, must contain
20257. Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in
20258. The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called
20259. A coal having high volatile matter content will
20260. Most of the coking coals are
20261. Gobar gas constitutes mainly of
20262. High ash containing coke
20263. Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.
20264. Coal is pulverised before burning in large capacity boiler furnaces mainly to
20265. DDC is presently published by:
20266. Which of the following is a single stage, fixed bed high pressure coal gasification process ?
20267. Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an __________ bed gasifier.
20268. In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by
20269. Gas yield in the Kopper-Totzek coal gasifier is about __________ Nm3/ton coal (ash = 35%).
20270. Which of the following is a primary fuel ?
20271. Combustion of pulverised coal compared to the lumpy coal
20272. The ratio of % total carbon obtained in the ultimate analysis of coke and % fixed carbon obtained in the proximate analysis is always
20273. A coal with high __________ content, would ignite most easily.
20274. KOH solution used in orsat apparatus absorbs
20275. During coking of coal, the ash content (percentage)
20276. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.
20277. The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to
20278. The weathering index of a coal
20279. Bright coal
20280. Dictionary Catalogue Code(1946)is developed by:
20281. Calorific value of of blast furnace gas is around __________ KCal/Nm3.
20282. In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less.
20283. Coal tar (produced by high temperature carbonisation) is the main source of
20284. The calorific value is the highest out of the following for
20285. C/H ratio is the maximum in case of
20286. Incomplete combustion of a fuel is characterised by the high __________ in the flue gas.
20287. Low temperature oxidation of stored coal results in the
20288. Gross calorific value will be equal to the net calorific value for
20289. Bulk density of pulverised coal may be about __________ kg/m3.
20290. Pulverised coal used in boiler firing need not have
20291. The Bibliographic Classification(bC)is devised by:
20292. Which is the most matured coal ?
20293. The average molecular weight of a flue gas having the composition by volume as CO2 = 25%, O2 = 25%, N2 = 50% will be
20294. Caking index of coal blend used for blast furnace coke making is about
20295. The reaction, C + CO2 2CO, taking place during coal gasification is called the __________ reaction.
20296. The maximum percentage of CO2 in a flue gas (from a carbonaceous fuel) can be
20297. The connecting symbol used to add a second level Time isolate number(T2)with a first level Time isolate(T1)number in Colon Classification(cC6)is:
20298. High amount of sulphur and phosphorous in coke causes
20299. The difference between total carbon and fixed carbon of coal will be minimum in case of
20300. The maximum adiabatic flame temperature is attained, when the fuel is burnt with