The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to (A) Grey cast iron (B) White cast iron (C) Mottled cast iron (D) Toughed cast iron

The cast iron when heated to red heat with powdered red haematite in an oven for increasing its
toughness, is converted to
(A) Grey cast iron
(B) White cast iron
(C) Mottled cast iron
(D) Toughed cast iron
by

1 Answer

Answer :

Answer: Option C
by

Related questions

Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Description : Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Last Answer : Answer: Option A

Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Description : Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Last Answer : Answer: Option B

For light and ornamental casting, the most unsuitable pig iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Description : For light and ornamental casting, the most unsuitable pig iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Last Answer : Answer: Option D

The variety of pig iron used for the manufacture of steel by Bessemer process, is (A) Bessemer pig (B) Grey pig (C) White forge pig (D) Mottled pig

Description : The variety of pig iron used for the manufacture of steel by Bessemer process, is (A) Bessemer pig (B) Grey pig (C) White forge pig (D) Mottled pig

Last Answer : Answer: Option A

If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Description : If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called (A) Bessemer pig (B) Grey or foundry pig (C) White or forge pig (D) Mottled pig

Last Answer : Answer: Option C

The variety of pig iron used for manufacture of wrought iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White forge pig (D) Mottled pig

Description : The variety of pig iron used for manufacture of wrought iron, is (A) Bessemer pig (B) Grey or foundry pig (C) White forge pig (D) Mottled pig

Last Answer : Answer: Option C

Explain the difference between grey iron and white iron. What is mottled iron ?

Description : Explain the difference between grey iron and white iron. What is mottled iron ?

Last Answer : The carbon in cast iron could exist at room temperature as either iron carbide, or as graphite which is the more stable form. Irons containing carbon as graphite are soft, easily ... equal proportions of graphite and iron carbide have intermediate hardness and are called mottled irons.

Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its fatigue strength (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature

Description : Pick out the wrong statement. (A) The toughness of a material decreases, when it is heated (B) Crane hooks are normally made of wrought iron (C) Cold working of a metal decreases its ... (D) The temperature at which new grains are formed in a metal is known as the recrystallisation temperature

Last Answer : (C) Cold working of a metal decreases its fatigue strength

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

__________ iron is produced, when molten pig iron is chilled suddenly. (A) White cast (B) Grey cast (C) Wrought (D) None of these

Description : __________ iron is produced, when molten pig iron is chilled suddenly. (A) White cast (B) Grey cast (C) Wrought (D) None of these

Last Answer : (A) White cast

White cast iron as compared to grey cast iron is (A) More durable (B) Very brittle (C) Very hard (D) All (A), (B) & (C)

Description : White cast iron as compared to grey cast iron is (A) More durable (B) Very brittle (C) Very hard (D) All (A), (B) & (C)

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

Which one has the maximum tensile strength out of the following? (A) Nodular cast iron (B) Pig iron (C) White cast iron (D) Grey cast iron

Description : Which one has the maximum tensile strength out of the following? (A) Nodular cast iron (B) Pig iron (C) White cast iron (D) Grey cast iron

Last Answer : (A) Nodular cast iron

__________ iron is produced, when molten pig iron is allowed to cool gradually. (A) White cast (B) Grey cast (C) Wrought (D) None of these

Description : __________ iron is produced, when molten pig iron is allowed to cool gradually. (A) White cast (B) Grey cast (C) Wrought (D) None of these

Last Answer : (B) Grey cast

__________ iron is produced by the annealing of white cast iron. (A) Malleable (B) Nodular (C) Ductile (D) Grey

Description : __________ iron is produced by the annealing of white cast iron. (A) Malleable (B) Nodular (C) Ductile (D) Grey

Last Answer : (A) Malleable

Annealing of white cast iron produces __________ iron. (A) Grey (B) Nodular (C) Malleable (D) Spheroidal

Description : Annealing of white cast iron produces __________ iron. (A) Grey (B) Nodular (C) Malleable (D) Spheroidal

Last Answer : (C) Malleable

__________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling

Description : __________ of grey cast iron produces white cast iron. (A) Tempering (B) Rapid heating (C) Rapid cooling (D) Slow cooling

Last Answer : Option B

Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is (A) Malleable iron (B) Grey cast iron (C) Chilled cast iron (D) White cast iron

Description : Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is (A) Malleable iron (B) Grey cast iron (C) Chilled cast iron (D) White cast iron

Last Answer : Option A

Minimum of 40% of iron, is available in (A) Magnetite (B) Red haematite (C) Limonite (D) Black band

Description : Minimum of 40% of iron, is available in (A) Magnetite (B) Red haematite (C) Limonite (D) Black band

Last Answer : Answer: Option D

Putty is made up of a) White lead and turpentine b) Powdered chalk and raw linseed oil* c) Red lead and linseed oil d) Zinc oxide and boiled linseed oil

Description : Putty is made up of a) White lead and turpentine b) Powdered chalk and raw linseed oil* c) Red lead and linseed oil d) Zinc oxide and boiled linseed oil

Last Answer : b) Powdered chalk and raw linseed oil*

Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey

Description : Copper sulphate crystals when heated strongly, lose their water of crystallization to give anhydrous copper sulphate accompanied by a change in color from: (a). Blue to green (b). Blue to white (c). Blue to sky blue (d). Blue to grey

Last Answer : (b). Blue to white

Pick out the wrong statement. (A) Wrought iron contains about 0.02% carbon (B) Wrought iron cannot be easily forged and welded (C) The chilled cast iron does not contain graphite (D) Spheroidal grey cast iron contains graphite flakes

Description : Pick out the wrong statement. (A) Wrought iron contains about 0.02% carbon (B) Wrought iron cannot be easily forged and welded (C) The chilled cast iron does not contain graphite (D) Spheroidal grey cast iron contains graphite flakes

Last Answer : (B) Wrought iron cannot be easily forged and welded

Oxyacetylene reducing flame is used while carrying out welding on (A) Alloy steel (B) Grey cast iron (C) Mild steel (D) High carbon steel

Description : Oxyacetylene reducing flame is used while carrying out welding on (A) Alloy steel (B) Grey cast iron (C) Mild steel (D) High carbon steel

Last Answer : (C) Mild steel

Oxyacetylene reducing flame is used while carrying out welding on (A) Alloy steel (B) Grey cast iron (C) Mild steel (D) High carbon steel

Description : Oxyacetylene reducing flame is used while carrying out welding on (A) Alloy steel (B) Grey cast iron (C) Mild steel (D) High carbon steel

Last Answer : Option C

Carbon is present in the form of __________ in grey cast iron. (A) Spheroids (B) Nodular aggregates of graphite (C) Flakes

Description : Carbon is present in the form of __________ in grey cast iron. (A) Spheroids (B) Nodular aggregates of graphite (C) Flakes

Last Answer : Option C

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. (A) Manganese (B) Phosphorous (C) Magnesium (D) Chromium

Description : Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron. (A) Manganese (B) Phosphorous (C) Magnesium (D) Chromium

Last Answer : Option C

Which material is suitable for shaft material? a. High speed steel b. Stainless steel or high carbon steel c. Grey cast iron d. Steel having approx. 0.4% carbon and 0.8% manganese

Description : Which material is suitable for shaft material? a. High speed steel b. Stainless steel or high carbon steel c. Grey cast iron d. Steel having approx. 0.4% carbon and 0.8% manganese

Last Answer : d. Steel having approx. 0.4% carbon and 0.8% manganese

______is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ? (a) Grey cast-iron (b) Cast steel (c) High carbon steel (d) Stainless steel

Description : ______is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ? (a) Grey cast-iron (b) Cast steel (c) High carbon steel (d) Stainless steel

Last Answer : (b) Cast steel

The material generally not used as extender in paints, is (A) Powdered silica (B) Gypsum (C) Talc (D) Zinc white

Description : The material generally not used as extender in paints, is (A) Powdered silica (B) Gypsum (C) Talc (D) Zinc white

Last Answer : Answer: Option D

Which grilled cheese sandwich is better? one made in a cast iron skillet or one cooked in a microwave oven?

Description : Which grilled cheese sandwich is better? one made in a cast iron skillet or one cooked in a microwave oven?

Last Answer : answer:I use just a regular frying pan, neither cast iron nor a microwave. I don't even understand how you would do it in a microwave. For ma, a grilled cheese is all about the delicately ... goodness! Without that, wouldn't you just be melting a cheese slice between two pieces of soggy bread?

How do you care for a cast iron dutch oven?

Description : How do you care for a cast iron dutch oven?

Last Answer : It is best to clean a cast iron dutch oven with hot water, a brush, and little to no soap. After the cast iron dutch oven is dried, it should be coated in a thin layer of cooking oil to prevent rusting. You should store it in a clean, dry area with the lid off.

Is it necessary to season a cast iron dutch oven before using for the first time?

Description : Is it necessary to season a cast iron dutch oven before using for the first time?

Last Answer : All cast iron cooking items, including dutch ovens, should be seasoned before first use. The seasoning process removes any chemical coating that the manufacturer may have applied, and creates a non-stick coating for the pan.

How To Season Your Cast Iron Dutch Oven?

Description : How To Season Your Cast Iron Dutch Oven?

Last Answer : Cast iron dutch ovens are excellent investments for both beginner and experienced cooks, and they can be used to prepare a variety of meals and dishes. Cast iron dutch ovens are also very durable, ... should turn off the oven and allow the cast iron dutch oven to cool completely before removing it.

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? (A) Anodising (B) Tempering (C) Carburising

Description : Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part? (A) Anodising (B) Tempering (C) Carburising

Last Answer : (B) Tempering

Pick up the correct statement from the following: (A) Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer (B) Cupola furnace is used for the manufacture of cast iron (C) Red short iron is of no value for welding purpose (D) All the above

Description : Pick up the correct statement from the following: (A) Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer (B) Cupola furnace is used for the manufacture of cast iron (C) Red short iron is of no value for welding purpose (D) All the above

Last Answer : Answer: Option D

Iron rust is (A) Ferrous oxide (B) Hydrated ferric oxide (C) Powdered iron (D) Ferric sulphide

Description : Iron rust is (A) Ferrous oxide (B) Hydrated ferric oxide (C) Powdered iron (D) Ferric sulphide

Last Answer : (B) Hydrated ferric oxide

Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During r

Description : Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During r

Last Answer : Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to ... molten slag `Fe_(2)(SiO_(3))_(3)`

Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During r

Description : Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During r

Last Answer : Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove ... is A. 10 B. 20 C. 30 D. 40

Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During r

Description : Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove the volatile impurities ,During r

Last Answer : Cost iron is prepared from haematite . In most of the Cases ore needs no concentration ,The ore is roasted to remove ... C` C. `FeC_(3)` D. `Fe_(2)C`

The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Description : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Last Answer : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore ... ` D. `CaO + SiO_(2) rarr CaSiO_(3)`

Consider the following statements and arrange in the order of true/false as given in the codes.`S_(1)`: In extraction of iron from haematite ore, the

Description : Consider the following statements and arrange in the order of true/false as given in the codes.`S_(1)`: In extraction of iron from haematite ore, the

Last Answer : Consider the following statements and arrange in the order of true/false as given in the codes.`S_(1)`: In ... `. A. TFTT B. FTFF C. FFTT D. TFFT

The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Description : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Last Answer : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore ... ` D. `CaO + SiO_(2) rarr CaSiO_(2)`

The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Description : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore is (are)

Last Answer : The reaction (s) which does (do) not occur in the reduction zone in the extraction of iron from haematite ore ... ` D. `CaO + SiO_(2) rarr CaSiO_(3)`

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)`

Consider the following statements in the extraction of iron from haematite: (I) `CO`is the main reducing agent (II) `Fe_(2)O_(3)`is used to oxidise th

Description : Consider the following statements in the extraction of iron from haematite: (I) `CO`is the main reducing agent (II) `Fe_(2)O_(3)`is used to oxidise th

Last Answer : Consider the following statements in the extraction of iron from haematite: (I) `CO`is the main reducing agent (II) ... I, II and III D. I, II and IV

The flux used in the extraction of iron from Haematite in te blast furnace is `"["EAM(ENG)2014"]"`

Description : The flux used in the extraction of iron from Haematite in te blast furnace is `"["EAM(ENG)2014"]"`

Last Answer : The flux used in the extraction of iron from Haematite in te blast furnace is `"["EAM(ENG)2014"]"` A. Lime stone B. Silica C. Coke D. CO

The slag formed in the blast furnace during the extraction of iron from haematite is

Description : The slag formed in the blast furnace during the extraction of iron from haematite is

Last Answer : The slag formed in the blast furnace during the extraction of iron from haematite is A. `Ca_(3)(PO_(4))_(2)` ... (3)` C. `FeSiO_(3)` D. `MnSiO_(3)`

In the extraction of iron from haematitie, the charge used is haematite, coke and lime stone in the following weight ration

Description : In the extraction of iron from haematitie, the charge used is haematite, coke and lime stone in the following weight ration

Last Answer : In the extraction of iron from haematitie, the charge used is haematite, coke and lime stone in the following weight ration ... C. `8:1:4` D. `1:4:8`

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

Which of the following is an ore of iron? (a) Bauxite (b) Haematite (c) Dolomite (d) Alunite

Description : Which of the following is an ore of iron? (a) Bauxite (b) Haematite (c) Dolomite (d) Alunite

Last Answer : Ans: (b)

Iron is extracted from - (1) Cinnabar (2) Haematite (3) Bauxite (4) Dolomite

Description : Iron is extracted from - (1) Cinnabar (2) Haematite (3) Bauxite (4) Dolomite

Last Answer : (2) Haematite Explanation: Haematite is mined as the main ore of iron. It is harder than pure iron, but much more brittle. It is coloured black to steel or silver-gray, brown to reddish brown, or red.