An example of shaft furnace is the (A) L.D. converter (B) Glass melting tank (C) Blast furnace (D) Soaking pit

An example of shaft furnace is the
(A) L.D. converter
(B) Glass melting tank
(C) Blast furnace
(D) Soaking pit
by

1 Answer

Answer :

(C) Blast furnace
by

Related questions

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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

An example of indirectly heated furnace is the (A) Soaking pit (B) Muffle furnace (C) Reheating furnace (D) None of these

Description : An example of indirectly heated furnace is the (A) Soaking pit (B) Muffle furnace (C) Reheating furnace (D) None of these

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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

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

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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

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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

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Description : Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percentfurnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C. (A) 5 (B) 60 (C) 20 (D) 40

Last Answer : (C) 20

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Description : Which of the following is a periodic furnace? (A) Tunnel kiln (B) Rotary kiln (C) Soaking pit (D) Reheating furnace

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Last Answer : (A) By-product coke ovens

Tank furnace used for melting of glass is made of (A) Mild steel (B) Cast iron (C) Refractory blocks (D) Stainless steel

Description : Tank furnace used for melting of glass is made of (A) Mild steel (B) Cast iron (C) Refractory blocks (D) Stainless steel

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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 : Which of the following gaseous fuels has the lowest calorific value? (A) Gobar gas (B) Refinery gas (C) Converter gas (D) Blast furnace gas

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Last Answer : (B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)

In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by (A) Conduction (B) Convection (C) Radiation (D) Cannot be predicted

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In which of the following furnaces, the gases are sucked through the stock bed from below? (A) Soaking pit (B) Sintering machine (C) Beehive oven (D) None of these

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

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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

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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)

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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)

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)

Typical waste gases temperature from glass melting furnace a) 1000-1550 oC b) 800-950 oC c) 650–750 oC d) 760-815 oC

Description : Typical waste gases temperature from glass melting furnace a) 1000-1550 oC b) 800-950 oC c) 650–750 oC d) 760-815 oC

Last Answer : 1000-1550 oC

. An example of a periodic furnace is the (A) Blast furnace stoves (B) Blast furnace (C) Coke oven heating chamber (D) Rotary kilns

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Last Answer : (A) Blast furnace stoves

Which is a continuous furnace? (A) Coke ovens (B) Annealing furnace (C) Glass tank furnace

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Which of the following is a batch furnace? (A) Cupola (B) Reheating furnace (C) Glass tank furnace (D) None of these

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Maintain 850 OC for 1 hour (soaking time).  Cool the material to 60 OC in 4 hours. a) Calculate the efficiency of the furnace, if the specific heat of steel is 0.12 kcal/kgOC and fuel oil consumption per batch is 1400 litres.  GCV of fuel oil - 10200 kcal/kg,  Cost of fuel oil - Rs. 46,000/kL,  Sp. gr. of fuel oil - 0.92. b) Due to high cost of oil, the plant management decides to convert to a lower operating cost LPG fired furnace lined on the inside with ceramic fibre insulation and with an operating efficiency of 80%, for same requirement. The investment towards installation of the new furnace is Rs. 50 lakhs. Calculate the Return on Investment, if the plant operates two batches per day and 250 days in a year.  Cost of LPG - Rs. 75/kg,  GCV of LPG - 12500 kcal/kg.

Description : In a heat treatment shop, steel components are heat-treated in batches of 80 Tons. The  heat treatment cycle is as follows;  Increase temperature from 30 OC to 850 OC in 3 hours.  ... efficiency of 80%, for same requirement. The investment towards installation of  the new furnace is Rs. 50

Last Answer : Quantity of steel treated per batch - 80 Tons a. Efficiency of Furnace: Useful heat supplied to steel - 80000 x 0.12 x (850 - 30)   = 7872000 kcal/batch .1 mark Total heat ... = Rs. 64400/batch Efficiency of new LPG furnace - 80% Heat supplied in new LPG furnace - 7872000/0.8

Sulphur melting pit in the sulphuric acid plant is made of (A) Lead lined stainless steel (B) Cast iron (C) Steel or cement-brick lined (D) Hard wood

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Last Answer : (C) Steel or cement-brick lined

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

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

The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the (A) Venturi atomiser (B) Gravity settling chamber (C) Electro-static precipitator (D) Cyclone separator

Description : The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the (A) Venturi atomiser (B) Gravity settling chamber (C) Electro-static precipitator (D) Cyclone separator

Last Answer : (C) Electro-static precipitator

Raw materials are charged in the iron blast furnace using (A) Bucket elevator (B) Skip hoist (C) Screw conveyor (D) None of these

Description : Raw materials are charged in the iron blast furnace using (A) Bucket elevator (B) Skip hoist (C) Screw conveyor (D) None of these

Last Answer : (B) Skip hoist

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

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Last Answer : (C) 4

Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case ofcomplete combustion of(A) Furnace oil with air(B) Furnace oil with oxygen(C) Blast furnace gas with air(D) Blast furnace gas with oxygen

Description : Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case ofcomplete combustion of (A) Furnace oil with air (B) Furnace oil with oxygen (C) Blast furnace gas with air (D) Blast furnace gas with oxygen

Last Answer : (C) Blast furnace gas with air

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)

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)

__________ atmosphere is maintained inside an iron blast furnace. (A) Oxidising (B) Reducing (C) Inert (D) Decarburising

Description : __________ atmosphere is maintained inside an iron blast furnace. (A) Oxidising (B) Reducing (C) Inert (D) Decarburising

Last Answer : (B) Reducing

Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent. (A) 20 (B) 40 (C) 60 (D) 80

Description : Thermal efficiency of blast furnace stoves used for heating blast (air) may be about __________ percent. (A) 20 (B) 40 (C) 60 (D) 80

Last Answer : (D) 80

Which one is not an induced draught furnace? (A) Blast furnace stove (B) Sintering furnace (C) High pressure boiler (D) None of these

Description : Which one is not an induced draught furnace? (A) Blast furnace stove (B) Sintering furnace (C) High pressure boiler (D) None of these

Last Answer : (A) Blast furnace stove

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Description : Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an (A) Blast furnace (B) Steam boiler (C) Salt bath furnace (D) Annealing furnace

Last Answer : (C) Salt bath furnace

Blast furnace stoves are meant for heating (A) Air (B) Blast furnace gas (C) Steam (D) None of these

Description : Blast furnace stoves are meant for heating (A) Air (B) Blast furnace gas (C) Steam (D) None of these

Last Answer : (A) Air

Operation of blast furnace stove is based on the principles of a __________ furnace. (A) Regenerative (B) Recuperative (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Operation of blast furnace stove is based on the principles of a __________ furnace. (A) Regenerative (B) Recuperative (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (A) Regenerative

Fuel used in B.F. stove is (A) Pulverised coal (B) Furnace oil (C) Blast furnace gas/mixed gas (D) Coke oven 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

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

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

Size of blast furnace grade coke is __________ mm. (A) 25-80 (B) 0-15 (C) 15-25 (D) > 100

Description : Size of blast furnace grade coke is __________ mm. (A) 25-80 (B) 0-15 (C) 15-25 (D) > 100

Last Answer : (A) 25-80

Which of the following is not a by-product fuel? (A) Producer gas (B) Blast furnace gas (C) Coke oven gas (D) Refinery 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

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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

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Description : Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O)? (A) Blast furnace coke (B) Low temperature coke (C) Anthracite coal (D) Sub-bituminous coa

Last Answer : (B) Low temperature coke