Which of the following is not a directly fired furnace?
(A) By-product coke oven
(B) Calcination kiln
(C) Sintering furnace
(D) Open hearth furnace

1 Answer

Answer :

(A) By-product coke oven

Related questions

Description : Which is a regenerative furnace? (A) Coke oven heating chamber (B) Open hearth furnace (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) and (B)

Description : Which of the following is a directly fired intermittent furnace? (A) Walking beam reheating furnace (B) Reverberatory furnace (C) Tower furnace (D) Tunnel kiln

Last Answer : (B) Reverberatory furnace

Description : Regenerators are normally provided in the (A) Glass melting furnace (B) Open hearth furnace (C) By product coke ovens (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : Regenerators are normally provided in the (A) Glass melting furnace (B) Open hearth furnace (C) By product coke ovens (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

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 : Large tonnage of refractory bricks are dried in a (A) Shaft furnace (B) Rotary hearth furnace (C) Tunnel kiln (D) Muffle furnace

Last Answer : (C) Tunnel kiln

Description : Regenerators are installed in (A) Coke ovens (B) Open hearth furnace (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Description : An example of recuperative furnace is the (A) Soaking pit (B) Open hearth furnace (C) Coke ovens (D) None of these

Last Answer : (A) Soaking pit

Description : Calcination of limestone to produce lime is done in a __________ kiln. (A) Tunnel (B) Rotary (C) Vertical shaft (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Description : Thermal efficiency of a limestone calcination rotary kiln may be around __________ percent. (A) 20 (B) 40 (C) 65 (D) 80

Last Answer : (B) 40

Description : Calcination reaction of limestone (CaCO3 → CaO + CO2 ) goes to completion in the rotary kiln, because (A) CaO is not dissociated (B) CO2 escapes continuously (C) Of high calcination temperature (D) CaO is more stable than CaCO3

Last Answer : (B) CO2 escapes continuously

Description : How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln? (A) 500°C (B) 750°C (C) 1000°C (D) 1500°C

Last Answer : (C) 1000°C

Description : Calcination of limestone is not done in a __________ kiln for producing lime. (A) Vertical shaft (B) Rotary (C) Fluidised bed (D) Fixed bed

Last Answer : (D) Fixed bed

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 : 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 : Neutral atmosphere is maintained in a/an __________ furnace. (A) Cold rolled steel coil annealing (B) Open hearth (C) Soaking pit (D) Walking beam reheating

Last Answer : (A) Cold rolled steel coil annealing

Description : Which furnace employs preheating, heating and soaking zones? (A) Soaking pit (B) Reheating furnace (C) Open hearth furnace (D) Cupola

Last Answer : (B) Reheating furnace

Description : __________ is an indirectly heated furnace. (A) Open hearth furnace (B) Muffle furnace (C) Soaking pit (D) Reheating furnace

Last Answer : (B) Muffle furnace

Description : Thermal efficiency of an open hearth furnace may be about __________ percent. (A) 5 (B) 20 (C) 50 (D) 80

Last Answer : (B) 20

Description : Which is not a hearth furnace? (A) Glass tank furnace (B) Open hearth furnace (C) Cupola

Last Answer : (C) Cupola

Description : Pick up the correct statement from the following: (A) In basic Bessemer process, the steel heats the converter (B) In open-hearth process, the furnace heats the steel (C) In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore (D) All the above

Last Answer : Answer: Option D

Description : Which furnace employs natural draft? (A) Coke oven (B) Boiler (C) Rotary kilns (D) L.D. converter

Last Answer : (A) Coke oven

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 : 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 : 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 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 is not a recuperative furnace? (A) Soaking pit (B) Reheating furnace (C) Steam boiler (D) Coke oven

Last Answer : (D) Coke oven

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 : 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

Last Answer : (A) Blast furnace gas

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 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 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 : 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)

Last Answer : (D) All (A), (B) and (C)

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 has the highest theoretical flame temperature? (A) Blast furnace gas (B) Hydrogen (C) Acetylene (D) Coke oven gas

Last Answer : (C) Acetylene

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 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 : 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 : 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 : 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

Last Answer : (A) Blast furnace 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 : 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 : 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 : 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 : 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 of the following fuel gases contains maximum amount of carbon monoxide? (A) Coke oven gas (B) Water gas (C) Blast furnace gas (D) L.D. converter gas

Last Answer : (D) L.D. converter gas

Description : In a 100 TPD Sponge Iron plant, the sponge iron is fed to the Induction melting furnace,  producing molten steel at 88% yield. The Energy consumption details are as follows: Coal Consumption : 130 ... molten  steel (product). 3. Total Energy Consumption of Plant in Tons of Oil Equivalent (TOE )

Last Answer :  a) Specific Energy Consumption of Induction Melting Furnace  Molten Steel Production from the Induction melting furnace per day  = 100 x 88/100 = 88 TPD Total Energy Consumption of the Plant = 82400 kWh ... mark c) Total Energy consumption of Plant in ToE  = 655864000/107  = 65.586 ToE