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

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
by

1 Answer

Answer :

(B) High temperature carbonisation
by

Related questions

Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Prime coking coal is always blended with medium or non- coking coal before carbonisation (A) To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls (B) Because, it alone produces unreactive coke (C) Both (A) and (B) (D) Neither (A) nor (B)

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

Presence of free moisture in coal during its high temperature carbonisation (A) Reduces the coking time (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls (C) Increases the loss of fine coal dust from the ovens when charging (D) None of these

Description : Presence of free moisture in coal during its high temperature carbonisation (A) Reduces the coking time (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls (C) Increases the loss of fine coal dust from the ovens when charging (D) None of these

Last Answer : (B) Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls

Main use of hard coke produced by high temperature carbonisation is in the (A) Iron blast furnace (B) Cupola in foundries (C) Sinter making (D) Domestic ovens

Description : Main use of hard coke produced by high temperature carbonisation is in the (A) Iron blast furnace (B) Cupola in foundries (C) Sinter making (D) Domestic ovens

Last Answer : (A) Iron blast furnace

Soft coke is not (A) Produced by low temperature carbonisation of coal (B) A domestic fuel (C) Used in blast furnaces (D) None of these

Description : Soft coke is not (A) Produced by low temperature carbonisation of coal (B) A domestic fuel (C) Used in blast furnaces (D) None of these

Last Answer : (C) Used in blast furnaces

In high temperature carbonisation (as compared to low temperature carbonisation) of coal (A) Coke oven gas yield is more (B) Tar yield is less but free carbon in tar is more (C) Calorific value of coke oven gas is less (D) All (A), (B) and (C)

Description : In high temperature carbonisation (as compared to low temperature carbonisation) of coal (A) Coke oven gas yield is more (B) Tar yield is less but free carbon in tar is more (C) Calorific value of coke oven gas is less (D) All (A), (B) and (C)

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

Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has (A) Higher calorific value (B) Lower hydrogen content (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has (A) Higher calorific value (B) Lower hydrogen content (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (D) Neither (A) nor (B)

In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. (A) Difference in gross & net calorific value of the coke oven gas (B) Free carbon content in tar (C) Yield percentage of coke (D) Yield of ammonia present in coke oven gas

Description : In low temperature carbonisation of coal as compared to high temperature carbonisation __________ produced is less. (A) Difference in gross & net calorific value of the coke oven gas (B) Free carbon content in tar (C) Yield percentage of coke (D) Yield of ammonia present in coke oven gas

Last Answer : (A) Difference in gross & net calorific value of the coke oven gas

In high temperature carbonisation of coal compared to low temperature carbonisation (A) Yield of ammonia is less (B) Aromatic content of tar is low (C) H2 content in the coke oven gas is more (D) Calorific value of the coke oven gas is lower

Description : In high temperature carbonisation of coal compared to low temperature carbonisation (A) Yield of ammonia is less (B) Aromatic content of tar is low (C) H2 content in the coke oven gas is more (D) Calorific value of the coke oven gas is lower

Last Answer : (C) H2 content in the coke oven gas is more

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

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

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

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

Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm3 /ton of dry coal. (A) 60 (B) 160 (C) 500 (D) 750

Description : Yield of coke oven gas in low temperature carbonisation of coal is about __________ Nm3 /ton of dry coal. (A) 60 (B) 160 (C) 500 (D) 750

Last Answer : (B) 160

Low temperature carbonisation of coal produces (A) Metallurgical coke (B) Soft coke (C) Very low calorific value coke oven gas (D) No by-products

Description : Low temperature carbonisation of coal produces (A) Metallurgical coke (B) Soft coke (C) Very low calorific value coke oven gas (D) No by-products

Last Answer : (B) Soft coke

In low temperature carbonisation of coal, the(A) Yield of coke oven gas is 290 Nm3/ton dry coal(B) Volatile matter in coke is zero(C) Temperature maintained is 700°C(D) Yield of tar is about 3% of dry coal

Description : In low temperature carbonisation of coal, the (A) Yield of coke oven gas is 290 Nm3 /ton dry coal (B) Volatile matter in coke is zero (C) Temperature maintained is 700°C (D) Yield of tar is about 3% of dry coal

Last Answer : (C) Temperature maintained is 700°C

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

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 (C) Heat release rate (thus requiring smaller combustion chamber) (D) All (A), (B) and (C)

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)

The main product of high temperature carbonisation of coal is (A) Coke (B) Ammonia (C) Tar (D) Coke oven gas

Description : The main product of high temperature carbonisation of coal is (A) Coke (B) Ammonia (C) Tar (D) Coke oven gas

Last Answer : (A) Coke

Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm3 . (A) 30 (B) 300 (C) 3,000 (D) 30,000

Description : Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm3 . (A) 30 (B) 300 (C) 3,000 (D) 30,000

Last Answer : (B) 300

Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Description : Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Last Answer : Answer: A

Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Description : Producer gas is obtained by  A. partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast  B. carbonisation of bituminous coal  C. passing steam over incandescent coke  D. passing air and a large amount of steam over waste coal at about 650°C

Last Answer : Answer: A

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

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

With increase in the temperature of carbonisation of coal (A) Hydrogen content of coke oven gas increases due to cracking ofhydrocarbons(B) Methane content in the coke oven gas decreases and carbon monoxidecontent increases(C) Calorific value of the coke oven gas decreases due to cracking ofhydrocarbons which is not compensated by increase in CO & H2 content(D) All (A), (B) and (C)

Description : With increase in the temperature of carbonisation of coal (A) Hydrogen content of coke oven gas increases due to cracking ofhydrocarbons (B) Methane content in the coke oven gas decreases and carbon monoxide content increases ( ... compensated by increase in CO & H2 content (D) All (A), (B) and (C)

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

A coal having higher volatile matter content, has lower (A) Smoking tendency on burning (B) Coke oven gas yield on carbonisation (C) Chance of catching fire during storage in open space (D) Ignition temperature

Description : A coal having higher volatile matter content, has lower (A) Smoking tendency on burning (B) Coke oven gas yield on carbonisation (C) Chance of catching fire during storage in open space (D) Ignition temperature

Last Answer : (D) Ignition temperature

Which of the following fuel gases is heavier than air? (A) Blast furnace gas (B) Coke oven gas (C) Natural gas (D) Water 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

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

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

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

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

Width of the coke oven towards coke side is slightly more than that on pusher side to (A) Facilitate easy discharging of coke as it swells during carbonisation (B) Facilitate uniform heating of the oven (C) Increase the output of the coke (D) None of these

Description : Width of the coke oven towards coke side is slightly more than that on pusher side to (A) Facilitate easy discharging of coke as it swells during carbonisation (B) Facilitate uniform heating of the oven (C) Increase the output of the coke (D) None of these

Last Answer : (A) Facilitate easy discharging of coke as it swells during carbonisation

High rate of heating of coke ovens (A) May damage its walls due to abrupt excessive swelling of coal (B) Produces larger size coke (C) Increases the time of carbonisation (D) None of these

Description : High rate of heating of coke ovens (A) May damage its walls due to abrupt excessive swelling of coal (B) Produces larger size coke (C) Increases the time of carbonisation (D) None of these

Last Answer : (A) May damage its walls due to abrupt excessive swelling of coal

In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the (A) Gas yield is less (B) Tar yield is more (C) Ignition temperature of coke produced is less (D) Aromatic content of tar produced is more

Description : In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the (A) Gas yield is less (B) Tar yield is more (C) Ignition temperature of coke produced is less (D) Aromatic content of tar produced is more

Last Answer : (D) Aromatic content of tar produced is more

High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Large quantity of tar compared to low temperature carbonisation (D) None of these

Description : High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Large quantity of tar compared to low temperature carbonisation (D) None of these

Last Answer : (D) None of these

High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation(B) Less of gases compared to liquid products(C) Larger quantity of tar compared to low temperature carbonisation(D) None of these

Description : High temperature carbonisation of coal produces (A) Inferior coke compared to low temperature carbonisation (B) Less of gases compared to liquid products (C) Larger quantity of tar compared to low temperature carbonisation (D) None of these

Last Answer : (D) None of these

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)

Regenerators are used for waste heat recovery in (A) By-product coke ovens (B) Beehive coke oven (C) Blast furnace stoves (D) Soaking pits

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

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

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 : 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

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

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

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

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

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

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

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 : 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)

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

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

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

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

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 : 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

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

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

Which of the following is a poisonous fuel gas? (A) Coke oven gas (B) Blast furnace gas (C) Natural gas (D) None of these

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

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)

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

. 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

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

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)

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)

Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm3 . (A) 4000 (B) 2500 (C) 6500 (D) 10000

Description : Calorific value of coke even gas produced by low temperature carbonisation of coal is about __________ Kcal/Nm3 . (A) 4000 (B) 2500 (C) 6500 (D) 10000

Last Answer : (C) 6500

Caking index of coal blend used for blast furnace coke making is about (A) 8 (B) 12 (C) 22 (D) 36

Description : Caking index of coal blend used for blast furnace coke making is about (A) 8 (B) 12 (C) 22 (D) 36

Last Answer : (C) 22

A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as

Description : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. This is known as

Last Answer : A mixture of haematite, coke and limestone on heating in blast furnace gives molten iron metal. ... Smelting B. Calcination C. Roasting D. Liquition