Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air in a reverberatory furnace to obtain th

Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air in a reverberatory furnace to obtain th
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Choose the correct option the code regarding roasting process. (I) It is the process of heating the ore in air ... III and IV D. I , II , III and IV
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Reverberatory furnace is used for (A) Roasting/reduction of ores (B) Annealing steel coil (C) Heating air (D) Steel melting

Description : Reverberatory furnace is used for (A) Roasting/reduction of ores (B) Annealing steel coil (C) Heating air (D) Steel melting

Last Answer : (A) Roasting/reduction of ores

When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced. The copper matter contains__________

Description : When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced. The copper matter contains__________

Last Answer : When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced. The copper ... sulphides of copper (I) and iron (III)

Heating of a ore below its melting point in the absence of air is known as – (1) Refining (2) Calcination (3) Roasting (4) Smelting

Description : Heating of a ore below its melting point in the absence of air is known as – (1) Refining (2) Calcination (3) Roasting (4) Smelting

Last Answer : (2) Calcination Explanation: Calcination involves simple decomposition of ore on heating below its melting point usually in absence of air to produce new compounds having higher percentage of ... as removing the moisture, organic matter and volatile impurities. Calcination makes the ore porous.

Sulphur removal by heating of pyrite ore in presence of air is called its (A) Reduction (B) Roasting (C) Calcination (D) Smelting

Description : Sulphur removal by heating of pyrite ore in presence of air is called its (A) Reduction (B) Roasting (C) Calcination (D) Smelting

Last Answer : (B) Roasting

Heating of a ore below its melting point in the absence of air is known as (1) Refining (2) Calcination (3) Roasting (4) Smelting

Description : Heating of a ore below its melting point in the absence of air is known as (1) Refining (2) Calcination (3) Roasting (4) Smelting

Last Answer : Calcination

Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Description : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and ... D. `Cu_(2)O +FeO`(large amount).

Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Description : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then ... CaSiO_(3)` D. `Cu_(2)O.SiO_(2)`

Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Description : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and ... (3)` D. To check the reduction of FeO

Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Description : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then smelted in a blast furnace. The matt

Last Answer : Extraction of copper is done using copper pyrites. After roasting, the ore is mixed with silica and coke and then ... O` D. `CuCO_(3).Cu(OH)_(2)`

Roasting of copper ore is carried out in which of the following furnace?

Description : Roasting of copper ore is carried out in which of the following furnace?

Last Answer : Roasting of copper ore is carried out in which of the following furnace? A. Reverberatory furnace B. ... furnace or blast furnace D. Neither 1 nor 2

(A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ore is done by calcinaiton

Description : (A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ore is done by calcinaiton

Last Answer : (A) Roasting is a process in which the ore is heate in presence of air (R ) Concentration of sulphide ... . If (A) is incorrect but (R ) is correct

Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined with haematite. Reason: Haematite oxidises

Description : Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined with haematite. Reason: Haematite oxidises

Last Answer : Assertion: Wrough iron is prepared from cast iron by oxidising impurities in a reverberatory furnace lined ... -1 is false but Statement -2 is true

In reverberatory furnace, charge is heated mainly by (A) Conduction (B) Natural convection (C) Radiation of heat from the roof of the combustion chamber (D) None of these

Description : In reverberatory furnace, charge is heated mainly by (A) Conduction (B) Natural convection (C) Radiation of heat from the roof of the combustion chamber (D) None of these

Last Answer : (C) Radiation of heat from the roof of the combustion chamber

Which is the most thermally efficient furnace? (A) Reheating furnace (B) Reverberatory furnace (C) Rotary kilns (D) Boiler furnace

Description : Which is the most thermally efficient furnace? (A) Reheating furnace (B) Reverberatory furnace (C) Rotary kilns (D) Boiler furnace

Last Answer : (D) Boiler furnace

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

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

__________ is an ore concentrating metallurgical process involving a chemical change. (A) Electromagnetic separation (B) Froth floatation (C) Roasting (D) None of these

Description : __________ is an ore concentrating metallurgical process involving a chemical change. (A) Electromagnetic separation (B) Froth floatation (C) Roasting (D) None of these

Last Answer : (C) Roasting

Pick up the correct statement from the following: (A) Roasting is not necessary if iron ore is an oxide (B) Impurities float on the molten iron as slag (C) The slag contains lime about 45% (D) All the above

Description : Pick up the correct statement from the following: (A) Roasting is not necessary if iron ore is an oxide (B) Impurities float on the molten iron as slag (C) The slag contains lime about 45% (D) All the above

Last Answer : Answer: Option D

Which of the following metals can be oriented directly during the roasting of its sulphide ore

Description : Which of the following metals can be oriented directly during the roasting of its sulphide ore

Last Answer : Which of the following metals can be oriented directly during the roasting of its sulphide ore A. Hg B. Zn C. Fe D. Ca

The use of heat treatment of ore that includes smelting and roasting is termed as - (1) Electrometallurgy (2) Hydrometallurgy (3) Pyrometallurgy (4) Cryometallurgy

Description : The use of heat treatment of ore that includes smelting and roasting is termed as - (1) Electrometallurgy (2) Hydrometallurgy (3) Pyrometallurgy (4) Cryometallurgy

Last Answer : (3) Pyrometallurgy Explanation: Pyrometallurgy consists of the thermal treatment of minerals and metallurgical ores and concentrates to bring about physical and chemical transformations in the materials to enable ... in a blast furnace in order to fuse the desired metals into impure molten bullion.

The use of Heat treatment of ore that includes smelting and roasting is termed as–

Description : The use of Heat treatment of ore that includes smelting and roasting is termed as–

Last Answer : Pyrometallurgy

Roasting of metallurgical ores is done mainly to (A) Dehydrate it (B) Sinter the ore (C) Remove CO2 & H2O (D) Remove arsenic & sulphur

Description : Roasting of metallurgical ores is done mainly to (A) Dehydrate it (B) Sinter the ore (C) Remove CO2 & H2O (D) Remove arsenic & sulphur

Last Answer : (D) Remove arsenic & sulphur

Iron ore hematite is concentrated using (A) Electromagnetic separation mainly (B) Gravity separation (C) Froth floatation (D) Roasting

Description : Iron ore hematite is concentrated using (A) Electromagnetic separation mainly (B) Gravity separation (C) Froth floatation (D) Roasting

Last Answer : (B) Gravity separation

The product (s) of roasting of a sulphide ore is (are) (A) Oxide only (B) Sulphate only (C) Oxide and sulphate (D) Dependent on temperature and partial pressure of oxygen & sulphur dioxide

Description : The product (s) of roasting of a sulphide ore is (are) (A) Oxide only (B) Sulphate only (C) Oxide and sulphate (D) Dependent on temperature and partial pressure of oxygen & sulphur dioxide

Last Answer : (A) Oxide only

Which of the following is an ore dressing operation? (A) Classification (B) Smelting (C) Roasting (D) None of these

Description : Which of the following is an ore dressing operation? (A) Classification (B) Smelting (C) Roasting (D) None of these

Last Answer : Option A

The use of heat treatment of ore that includes smelting and roasting is termed as : (1) Electrometallurgy (2) Hydrometallurgy (3) Pyrometallurgy (4) Cryometallurgy

Description : The use of heat treatment of ore that includes smelting and roasting is termed as : (1) Electrometallurgy (2) Hydrometallurgy (3) Pyrometallurgy (4) Cryometallurgy

Last Answer : Pyrometallurgy

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

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

Choose the correct option regarding energy of empty orbitals. `{:(,n,l,m,s),((I),4,0,0,+(1)/(2)),((III),3,1,1,+(1)/(2)):}` ` {:(,n,l,m,s),((II),3,2,0,

Description : Choose the correct option regarding energy of empty orbitals. `{:(,n,l,m,s),((I),4,0,0,+(1)/(2)),((III),3,1,1,+(1)/(2)):}` ` {:(,n,l,m,s),((II),3,2,0,

Last Answer : Choose the correct option regarding energy of empty orbitals. `{:(,n,l,m,s),((I),4,0,0,+(1)/(2)),((III),3, ... . `II lt I` C. `II lt III` D. `I = III`

Read the facts regarding the Revolution of the Liberals in Europe during 1848 and choose the correct option: 1. Abdication of the monarch

Description : Read the facts regarding the Revolution of the Liberals in Europe during 1848 and choose the correct option: 1. Abdication of the monarch

Last Answer : Read the facts regarding the Revolution of the Liberals in Europe during 1848 and choose the correct option: 1. ... (d) Only 1, 2 and 4 are correct.

The main charge in blast furnace is usually (A) Iron ore & coke (B) Iron ore, coke & air (C) Limestone, coke & iron ore (D) Limestone, sand & iron ore

Description : The main charge in blast furnace is usually (A) Iron ore & coke (B) Iron ore, coke & air (C) Limestone, coke & iron ore (D) Limestone, sand & iron ore

Last Answer : Limestone, coke & iron ore

Read the assertion and reason carefully to mark the correct option out of the option given below: Assertion: Thick layers of muscles are present in th

Description : Read the assertion and reason carefully to mark the correct option out of the option given below: Assertion: Thick layers of muscles are present in th

Last Answer : Read the assertion and reason carefully to mark the correct option out of the option given below: Assertion: Thick ... D. Both (A) of (R ) are false.

Statement-1: Silica is added as a flux in reverberatory furnance, in the extraction of copper from copper pyrites. Statement-2: Silica decreases the m

Description : Statement-1: Silica is added as a flux in reverberatory furnance, in the extraction of copper from copper pyrites. Statement-2: Silica decreases the m

Last Answer : Statement-1: Silica is added as a flux in reverberatory furnance, in the extraction of copper from ... Statement-1 is false but Statement -2 is true

Heating the ore below its melting point in the absence of air I to remove volatile impuri- ties is known as?

Description : Heating the ore below its melting point in the absence of air I to remove volatile impuri- ties is known as?

Last Answer : Calcination

Heating of ore in the absence of air below its melting point is called

Description : Heating of ore in the absence of air below its melting point is called

Last Answer : Calcinations

Air at a particular humidity is heated in a furnace. The new dew point (A) Decreases (B) Increases (C) Depends on the extent of heating (D) Remain unchanged

Description : Air at a particular humidity is heated in a furnace. The new dew point (A) Decreases (B) Increases (C) Depends on the extent of heating (D) Remain unchanged

Last Answer : (B) Increases

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

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

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

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

Find false statement about effect of sulphur in fuel? (A) It has heating value (B) It helps in electrostatic precipitation of ash in flue gases (C) It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low (D) It erodes furnace walls

Description : Find false statement about effect of sulphur in fuel? (A) It has heating value (B) It helps in electrostatic precipitation of ash in flue gases (C) It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low (D) It erodes furnace walls

Last Answer : (D) It erodes furnace walls

In the heating process of the ________type a simple method of temperature control is possible by means of a special alloy which loses its magnetic properties at a particular high temperature and regains them when cooled to a temperature below this value. (A) Indirect induction over (B) core type induction furnace (C) coreless induction furnace (D) high frequency eddy current

Description : In the heating process of the ________type a simple method of temperature control is possible by means of a special alloy which loses its magnetic properties at a particular high temperature and regains ... ) core type induction furnace (C) coreless induction furnace (D) high frequency eddy current

Last Answer : Ans: D Magnetic property of alloy changes with change of the temperature and Heat is produced due to eddy current = i2R and i α f2

Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? A. Increasing the weight of the compressor B. Inter-stage heating C. Atmospheric cooling D. Providing appropriate dimensions to the cylinder

Description : Which one of the following methods can be adopted to obtain isothermal compression in an air compressor? A. Increasing the weight of the compressor B. Inter-stage heating C. Atmospheric cooling D. Providing appropriate dimensions to the cylinder

Last Answer : ANSWER : A

In the extraction of iron in the blast furnace, the reducing agent for the ore is

Description : In the extraction of iron in the blast furnace, the reducing agent for the ore is

Last Answer : In the extraction of iron in the blast furnace, the reducing agent for the ore is A. Carbon monoxide B. Carbon dioxide C. Carbon D. Silica

The main reactions occuring in blast furnace during extraction of iron from haematite ore…..

Description : The main reactions occuring in blast furnace during extraction of iron from haematite ore…..

Last Answer : The main reactions occuring in blast furnace during extraction of iron from haematite ore .. A. `Fe_(2)O_ ... 3Cto2Fe+3CO` D. `CaO+SiO_(2)toCaSiO_(2)`

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

Uranium is recovered from its ore (pitchblende) by (A) Froth floatation technique (B) Leaching with sulphuric acid (C) Smelting in a furnace (D) Dissolving in water

Description : Uranium is recovered from its ore (pitchblende) by (A) Froth floatation technique (B) Leaching with sulphuric acid (C) Smelting in a furnace (D) Dissolving in water

Last Answer : (B) Leaching with sulphuric acid

__________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace. (A) Bauxite (B) Limestone (C) Quartz (D) Manganese

Description : __________ is used as a flux in the extraction of iron from iron ore (haematite) in blast furnace. (A) Bauxite (B) Limestone (C) Quartz (D) Manganese

Last Answer : (B) Limestone

Which is the main reducing agent during production of iron from iron ore in a blast furnace? (A) C (B) CO (C) CO2 (D) H2

Description : Which is the main reducing agent during production of iron from iron ore in a blast furnace? (A) C (B) CO (C) CO2 (D) H2

Last Answer : (B) CO

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

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

Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace? w) coke x) cementite y) coal z) bauxite

Description : Which of the following materials is used along with iron ore and limestone to produce iron in a modern blast furnace? w) coke x) cementite y) coal z) bauxite

Last Answer : ANSWER: W -- COKE

Mark the correct option relating to fee for obtain information under RTI act a) Rs 2/- per each page (A4/A3 size paper) created or copied b) Actual charge or cost price of a copy in large size paper c) Actual cost or price for samples or models d) For inspection of records no fee for the first hour and a fee Rs5/- for each subsequent hour e) All the above

Description : Mark the correct option relating to fee for obtain information under RTI act a) Rs 2/- per each page (A4/A3 size paper) created or copied b) Actual charge or cost price of a copy in large size paper ... records no fee for the first hour and a fee Rs5/- for each  subsequent hour  e) All the above

Last Answer : e) All the above

Mark the correct option relating to Village postman book a) Village postman book is form 86 should be kept by each village postman b) Before proceeding on his beat, the village postman must enter in it the date and day of the week on which he leaves the post office and the names of all villages that he required to visit. c) As each village is visited, the village postman should obtain the signature of the Headman or other responsible person with date and time.. d) All the above

Description : Mark the correct option relating to Village postman book a) Village postman book is form 86 should be kept by each village postman b) Before proceeding on his beat, the village postman must enter in ... the signature of the Headman or other responsible person with date and time.. d) All the above

Last Answer : d) All the above