Description : Gross & net calorific value is the same for (A) Blast furnace gas (B) Coke oven gas (C) L.D. converter gas (D) None of these
Last Answer : (C) L.D. converter gas
Description : Mixed gas' used in steel plants is a mixture of (A) B.F. gas and coke oven gas (B) Coke oven gas and converter gas (C) Coke oven gas and L.P.G (D) Blast furnace gas and naphtha vapor
Last Answer : (A) B.F. gas and coke oven gas
Description : Which of the following is the most poisonous gas? (A) Coke oven gas (B) Producer gas (C) Blast furnace gas (D) L.D. converter gas
Last Answer : (D) L.D. converter gas
Description : Which of the following fuel gases is heavier than air? (A) Blast furnace gas (B) Coke oven gas (C) Natural gas (D) Water gas
Last Answer : (A) Blast furnace gas
Description : Which of the following contains least amount of N2? (A) Coke oven gas (B) Blast furnace gas (C) Producer gas (D) Water gas (blue gas)
Last Answer : (A) Coke oven gas
Description : Which is the heaviest fuel gas out of the following? (A) Blast furnace gas (B) Coke oven gas (C) Water gas (D) Carburetted water gas
Description : Fuel used in B.F. stove is (A) Pulverised coal (B) Furnace oil (C) Blast furnace gas/mixed gas (D) Coke oven gas
Last Answer : (C) Blast furnace gas/mixed gas
Description : Which of the following is not a by-product fuel? (A) Producer gas (B) Blast furnace gas (C) Coke oven gas (D) Refinery gas
Last Answer : (A) Producer gas
Description : Coke oven gas is a better fuel than blast furnace gas, because of its higher (A) Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity) (B) Adiabatic flame temperature ... release rate (thus requiring smaller combustion chamber) (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Which of the following is a poisonous fuel gas? (A) Coke oven gas (B) Blast furnace gas (C) Natural gas (D) None of these
Last Answer : (B) Blast furnace gas
Description : Which of the following fuels is generally not used in thermal power plant boiler firing? (A) Furnace oil, light diesel oil and tar/PCM (B) Pulverised coking coal (C) Coal middling from washeries (D) B.F. gas, coke oven gas and L.D. converter gas
Last Answer : (B) Pulverised coking coal
Description : Which furnace employs an I.D. fan for the removal of flue gases from the furnace? (A) Coke oven (B) Blast furnace stoves (C) Beehive coke oven (D) High pressure boiler
Last Answer : (D) High pressure boiler
Description : Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas? (A) Blast furnace gas (B) Natural gas (C) Producer gas (D) Water gas
Last Answer : (B) Natural gas
Description : In a furnace operation, which is not preheated? (A) Solid fuels (B) Hydrocarbon containing fuel gases (e.g. coke oven gas, refinery gas etc.) (C) Both (A) and (B) (D) Neither (A) nor (B)
Last Answer : (C) Both (A) and (B)
Description : Which furnace employs natural draft? (A) Coke oven (B) Boiler (C) Rotary kilns (D) L.D. converter
Last Answer : (A) Coke oven
Description : Out of the following fuels, the difference between gross and net calorific value will be minimum in case of (A) Coke oven gas (B) Water gas (C) Natural gas (D) Blast furnace gas
Last Answer : (D) Blast furnace gas
Description : Which of the following has the highest gross calorific value? (A) Blast furnace gas (B) Coke oven gas (C) Carburetted water gas (D) Oil refinery gas
Last Answer : (D) Oil refinery gas
Description : The calorific value is the highest out of the following for (A) Producer gas (B) Water gas (C) Coke oven gas (D) Blast furnace gas
Last Answer : (C) Coke oven gas
Description : Coke ovens in steel plant are heated by (A) Electricity (B) Blast furnace gas/mixed gas (C) Coke oven gas (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Which of the following has the least calorific value (kcal/Nm3 )? (A) Blast furnace gas (B) Coke oven gas (C) Sewage gas (D) Natural gas
Description : Coke oven gas compared to blast furnace gas is (A) More explosive and inflammable (B) Less poisonous (C) Lighter (D) All (A), (B) and (C)
Description : Which of the following has the highest theoretical flame temperature? (A) Blast furnace gas (B) Hydrogen (C) Acetylene (D) Coke oven gas
Last Answer : (C) Acetylene
Description : Blast furnace gas compared to coke oven gas has (A) Lower ignition temperature (B) Narrower limit of inflammability (C) Higher calorific value (D) Lower theoretical flame temperature
Last Answer : (D) Lower theoretical flame temperature
Description : Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the (A) Hot scarfing of steel slabs (B) Mixing with blast furnace gas (C) Coke oven battery heating (D) Steel ladle drying
Last Answer : (C) Coke oven battery heating
Description : Which of the following is a primary fuel? (A) Blast furnace coke (B) Gasoline (C) Natural gas (D) Wood charcoal
Last Answer : (C) Natural gas
Description : Which of the following would require maximum amount of % excess air for complete combustion? (A) Coke oven gas (B) Furnace oil (C) Pulverised coal (D) Lump coal (fixed on chain grate)
Last Answer : (D) Lump coal (fixed on chain grate)
Description : Regenerators are used for waste heat recovery in (A) By-product coke ovens (B) Beehive coke oven (C) Blast furnace stoves (D) Soaking pits
Last Answer : (A) By-product coke ovens
Description : . An example of a periodic furnace is the (A) Blast furnace stoves (B) Blast furnace (C) Coke oven heating chamber (D) Rotary kilns
Last Answer : (A) Blast furnace stoves
Description : Blast furnace coke is made from coal by (A) Low temperature carbonisation (B) High temperature carbonisation (C) Medium temperature carbonisation (D) Heating the coal in an oven in presence of air
Last Answer : (B) High temperature carbonisation
Description : Percentage of carbon monoxide in blast furnace gas may be around (A) 8 (B) 14 (C) 22 (D) 52
Last Answer : (C) 22
Description : Reducing atmosphere is maintained in a (A) Calcination kiln (B) Blast furnace (C) Soaking pit (D) L.D. converter
Last Answer : (B) Blast furnace
Description : An example of shaft furnace is the (A) L.D. converter (B) Glass melting tank (C) Blast furnace (D) Soaking pit
Last Answer : (C) Blast furnace
Description : Refractory bricks having high thermal conductivity is desirable, when it is to be used in the (A) L.D. converter (B) Blast furnace (C) Rotary kiln (D) Recuperator
Last Answer : (D) Recuperator
Description : 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 (A) Tar (B) Coke oven gas (C) Pitch (D) Pulverised coke
Last Answer : (B) Coke oven gas
Description : Main use of soft coke is as __________ fuel. (A) Domestic (B) Blast furnace (C) Foundry (D) None of these
Last Answer : (A) Domestic
Description : For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3 ), while the C.V. is same on weight basis (i.e., kcal/kg)? (A) Propane and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F. gas and coke oven gas
Last Answer : (A) Propane and acetylene
Description : For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg)? (A ... and acetylene (B) Propane and LPG (C) Sewage gas and gobar gas (D) B.F gas and coke oven gas
Last Answer : D) B.F gas and coke oven gas
Description : The main reducing agent in iron blast furnace is(A) Carbon dioxide (B) Carbon monoxide (C) Oxygen (D) Air
Last Answer : Option B
Description : Petroleum coke is used mainly in the (A) Discoloration of yellow glycerine (B) Sugar refining (C) Manufacture of carbon electrode (D) Blast furnace for reduction of iron ore
Last Answer : (C) Manufacture of carbon electrode
Description : 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 (A) Presence of large ... fuel (C) High sulphur content in the fuel (D) Lack of thorough mixing of fuel with air
Last Answer : (D) Lack of thorough mixing of fuel with air
Description : Which of the following will generate maximum volume of product of complete combustion (Nm3 /Nm3 of fuel)? (A) Carburetted water gas (B) Blast furnace gas (C) Natural gas (D) Producers' gas
Description : Which of the following contributes maximum as main source of sulphur in the blast furnace charge? (A) Sinter (B) Coke (C) Iron ore (D) Limestone
Last Answer : Coke
Description : Which of the following gaseous fuels has the lowest calorific value? (A) Gobar gas (B) Refinery gas (C) Converter gas (D) Blast furnace gas
Description : Out of the following fuels, the difference between the net and gross calorific value is maximum in case of (A) Pitch (B) Fuel oil (C) Blast furnace gas (D) Bituminous coal
Last Answer : (B) Fuel oil
Description : Near the top of the blast furnace, iron oxides are reduced to …… by carbon monoxide .
Last Answer : Near the top of the blast furnace, iron oxides are reduced to …… by carbon monoxide . A. C B. CO C. `CO_(2)` D. `CaCO_(3)`
Description : Pick out the wrong statement: (A) Carburetted water gas is also called blue gas (B) Coals are divided in four species according to their carbon content in Seylor's classification (C) Carbonisation time ... and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons
Last Answer : (A) Carburetted water gas is also called blue gas
Description : High ash containing coke (A) Produces more slag when used in the blast furnace (B) Has poor strength and abrasion resistance (C) Is desirable in producer gas manufacture (D) None of these
Last Answer : (A) Produces more slag when used in the blast furnace
Description : The impure iron (pig iron) that is tapped out from blast furnace contains about __________ percent carbon. (A) 0.2 (B) 2 (C) 4 (D) 8
Last Answer : (C) 4
Description : Overfire burning in a furnace is a phenomenon characterised by (A) Supply of excess fuel (B) Supply of excess air (C) Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air (D) None of these
Last Answer : (C) Burning carbon monoxide and other incombustible in upper zone of furnace by supplying more air
Description : Overfire burning" in a furnace is a phenomenon characterised by the (A) Supply of excess fuel (B) Supply of excess air (C) Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air (D) None of these
Last Answer : (C) Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air