Multi Option Question Page 685

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You Are On Multi Choice Question Bank SET 685

34251. The hottest part of the flame lies in its____zone.

34252. Bunsen burner is an example of a/an __________ burner.

34253. Higher efficiency in the combustion of solid fuel can not be achieved by

34254. A coal containing very high percentage of durain is called __________ coal.

34255. During combustion of gaseous fuels, deficiency of air

34256. Gross and net calorific value of a fuel will be the same

34257. Low temperature carbonisation

34258. Example of an indirectly heated furnace is

34259. Which furnace employs preheating, heating and soaking zones ?

34260. Calcination of limestone to produce lime is done in a __________ kiln.

34261. Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of

34262. Ceramic recuperators compared to metallic recuperators for the same duty

34263. In order to maintain a reducing atmosphere in a furnace, it should have

34264. Which is the most thermally efficient furnace ?

34265. The heat recoverable from flue gases of furnaces depends on the

34266. Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.

34267. Which is a continuous furnace ?

34268. Which of the following is the most suitable for preheating combustion air above 650°C ?

34269. Soaking pits are meant for heating steel

34270. The purpose of controlling the furnace atmosphere is to prevent surface attack by

34271. Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent.

34272. In producer gas making furnace, steam is added along with air to mainly control the

34273. Fuel used in B.F. stove is

34274. Tunnel kilns are usually used for

34275. The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.

34276. Higher furnace temperature can not be achieved by use of a lean fuel gas in the furnace by

34277. Temperature of a furnace fired with low calorific value fuel gas (i.e. lean gas) can be increased by

34278. Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of

34279. In reverberatory furnace, charge is heated mainly by

34280. An example of a periodic furnace is the

34281. Ostwald charts are meant for

34282. Maximum heat transfer in high temperature furnaces is by

34283. Which of the following is a natural draft furnace ?

34284. To reduce the stack loss, heat recovery from flue gas can be done by

34285. Large tonnage of refractory bricks are dried in a

34286. Pulverised fuel fired furnaces employ __________ fuel firing.

34287. Which of the following is not a directly fired furnace ?

34288. The reason for excessive clinker formation in gas producers is the

34289. Which of the following is not an additive for flue gases from furnace to reduce its dew-point?

34290. Acid dew point temperature (ADT) of a flue gas produced by the combustion of a fuel containing 1% sulphur may be about __________ °C.

34291. Low stack loss indicates the

34292. Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent.

34293. Heat transfer rate to the stock/charge in the furnace does not depend upon the

34294. Which edition of Colon Classification is considered as a freely faceted classification scheme?

34295. Power required in case of forced draught as compared to induced draught (for the same draught produced) is

34296. Means for giving direction to the circulation of gases in furnaces are

34297. The amount of combustible escaping uncon-sumed from the furnace, depends upon the

34298. __________ is an indirectly heated furnace.

34299. The thermal efficiency of an air/fuel gas preheating recuperator may be as high as __________ percent.

34300. In a muffle furnace, the muffle

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34251. The hottest part of the flame lies in its____zone. (adsbygoogle = window.adsbygoogle || []).push({});