Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating. (A) Cementite (B) Austenite (C) Martensite (D) Pearlite

Transformation range for ferrous material is the temperature interval
during which __________ is formed during its heating.
(A) Cementite
(B) Austenite
(C) Martensite
(D) Pearlite
by

1 Answer

Answer :

Option B
by

Related questions

Eutectoid composition of carbon steel at room temperature is (A) Cementite (B) Pearlite(C) Martensite (D) Ferrite

Description : Eutectoid composition of carbon steel at room temperature is (A) Cementite (B) Pearlite (C) Martensite (D) Ferrite

Last Answer : Option B

Which of the following is the hardest? (A) Cementite (B) Pearlite (C) Austenite (D) Ferrite

Description : Which of the following is the hardest? (A) Cementite (B) Pearlite (C) Austenite (D) Ferrite

Last Answer : (C) Austenite

Sub zero treatment of steel is done to (A) Suppress martensite transformation (B) Enhance its working performance in sub zero atmosphere (C) Reduce the retained austenite in hardened steel (D) Induce temper brittleness after its hardening

Description : Sub zero treatment of steel is done to (A) Suppress martensite transformation (B) Enhance its working performance in sub zero atmosphere (C) Reduce the retained austenite in hardened steel (D) Induce temper brittleness after its hardening

Last Answer : Option C

Pearlite comprises of (A) 87% cementite & 13% Fe (B) 87% ferrite & 13% cementite (C) 93.33% ferrite & 6.67% C (D) 87% ferrite & 13% C

Description : Pearlite comprises of (A) 87% cementite & 13% Fe (B) 87% ferrite & 13% cementite (C) 93.33% ferrite & 6.67% C (D) 87% ferrite & 13% C

Last Answer : (B) 87% ferrite & 13% cementite

Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to (A) Sorbite (B) Bainite (C) Martensite (D) Troostite

Description : Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to (A) Sorbite (B) Bainite (C) Martensite (D) Troostite

Last Answer : (B) Bainite

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the (A) Retained austenite (B) Martensite formation (C) Relatively high sulphur content in the base metal (D) Sufficient hydrogen present in the welding arc

Description : Cold cracking in the heat affected zone of a high strength steel weld can take place because of the (A) Retained austenite (B) Martensite formation (C) Relatively high sulphur content in the base metal (D) Sufficient hydrogen present in the welding arc

Last Answer : (B) Martensite formation

Maraging steels derive their strength from the following mechanism: (A) A fine, highly dislocated and strong martensite (B) Fine dispersions of inter-metallic of Fe, Ni, Ti etc (C) Fine dispersions of alloy carbides in a ferrite matrix (D) Fine dispersions of Fe3 C nucleated on dislocations in austenite

Description : Maraging steels derive their strength from the following mechanism: (A) A fine, highly dislocated and strong martensite (B) Fine dispersions of inter-metallic of Fe, Ni, Ti etc (C) Fine ... alloy carbides in a ferrite matrix (D) Fine dispersions of Fe3 C nucleated on dislocations in austenite

Last Answer : Option A

Explain the formation of micro structures of pearlite, bainite and martensite in steel.

Description : Explain the formation of micro structures of pearlite, bainite and martensite in steel.

Last Answer : If austenite containing about 0.80 percent carbon is slowly cooled through the critical temperature, ferrite and cementite are rejected simultaneously, forming alternate plates or lamellae. This ... This phase has a tetragonal crystal structure and contains carbon in supersaturated solid solution.

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called (A) Tempering (B) Hardening (C) Annealing (D) Normalising

Description : Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called (A) Tempering (B) Hardening (C) Annealing (D) Normalising

Last Answer : Option C

Globular form of cementite is formed during the __________ process. (A) Spheroidising (B) Hardening (C) Annealing (D) Normalising

Description : Globular form of cementite is formed during the __________ process. (A) Spheroidising (B) Hardening (C) Annealing (D) Normalising

Last Answer : (B) Hardening

Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel. (A) 0.01 to 0.10 (B) 0.2 to 0.4 (C) 0.5 to 0.7 (D) 0.8 to 1.0

Description : Maximum change in the hardness of martensite occurs in the carbon content range of __________ percent in steel. (A) 0.01 to 0.10 (B) 0.2 to 0.4 (C) 0.5 to 0.7 (D) 0.8 to 1.0

Last Answer : (B) 0.2 to 0.4

Cementite is in the lamellar form in the __________ phase of steel. (A) Martenistic (B) Bainitic (C) Pearlitic (D) Ferritic

Description : Cementite is in the lamellar form in the __________ phase of steel. (A) Martenistic (B) Bainitic (C) Pearlitic (D) Ferritic

Last Answer : Option C

__________ of austenite decreases the hardenability in steel. (A) Fine grains (B) Coarse grains (C) Homogeneity (D) Dissolved elements (except cobalt)

Description : __________ of austenite decreases the hardenability in steel. (A) Fine grains (B) Coarse grains (C) Homogeneity (D) Dissolved elements (except cobalt)

Last Answer : (D) Dissolved elements (except cobalt)

Steels with high carbon equivalent have poor Weldability, because in these steels during welding (A) Carbon and other alloying elements get oxidised from the weld pool (B) Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld (C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld (D) Segregation of carbon and other element occurs in the weld pool leading to poor properties of the weld

Description : Steels with high carbon equivalent have poor Weldability, because in these steels during welding (A) Carbon and other alloying elements get oxidised from the weld pool (B) Excessive ferrite forms in the ... of carbon and other element occurs in the weld pool leading to poor properties of the weld

Last Answer : (C) Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld

Stellite is a __________ material. (A) Ferrous (B) Ceramic (C) Cemented carbide (D) Non-ferrous cast alloy cutting tool

Description : Stellite is a __________ material. (A) Ferrous (B) Ceramic (C) Cemented carbide (D) Non-ferrous cast alloy cutting tool

Last Answer : (D) Non-ferrous cast alloy cutting tool

Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Description : Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure

Last Answer : (A) Is used as an alloying element for both ferrous & non-ferrous alloys

Cementite is (A) Fe3C chemically (B) A compound of carbon and iron (C) Characterised by an orthorhombic crystal structure (D) All (A), (B) and (C)

Description : Cementite is (A) Fe3C chemically (B) A compound of carbon and iron (C) Characterised by an orthorhombic crystal structure (D) All (A), (B) and (C)

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

A hardened steel essentially contains (A) Sorbite (B) Troostite (C) Martensite (D) None of these

Description : A hardened steel essentially contains (A) Sorbite (B) Troostite (C) Martensite (D) None of these

Last Answer : (C) Martensite

Secondary hardening in steels arises out of the (A) Precipitation of fine alloy carbides at high temperatures (B) Refinement of ferrite grain size by working (C) Decomposition of retained austenite upon heat treatment (D) Precipitation of complex inter-metallic upon heat treatment

Description : Secondary hardening in steels arises out of the (A) Precipitation of fine alloy carbides at high temperatures (B) Refinement of ferrite grain size by working (C) Decomposition of retained austenite upon heat treatment (D) Precipitation of complex inter-metallic upon heat treatment

Last Answer : Option C

What is the colour of ferrous sulphate crystals? How does this colour change after heating? -Chemistry

Description : What is the colour of ferrous sulphate crystals? How does this colour change after heating? -Chemistry

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Explain the difference between pearlite and cementile ?

Description : Explain the difference between pearlite and cementile ?

Last Answer : Pearlite is eutectoid mixture of ferrite and cementile. Cementite is chemical compound of iron and carbon.

__________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working. (A) Solid solution hardening (B) Screw dislocation (C) Strain ageing (D) Twinning

Description : __________ of a material results, when its strength is increased & ductility is decreased by heating at a relatively lower temperature after cold working. (A) Solid solution hardening (B) Screw dislocation (C) Strain ageing (D) Twinning

Last Answer : (C) Strain ageing

Pick out the wrong statement. (A) Weldability of high carbon steel is poorer compared to low carbon steel (B) Invar is a magnetic alloy (C) Magnetic permeability of the diamagnetic material is less than one (D) Martenistic transformation never goes to completion (i.e., 100%) at room temperature

Description : Pick out the wrong statement. (A) Weldability of high carbon steel is poorer compared to low carbon steel (B) Invar is a magnetic alloy (C) Magnetic permeability of the diamagnetic material is less than one (D) Martenistic transformation never goes to completion (i.e., 100%) at room temperature

Last Answer : Option B

Pick up the correct statement from the following: (A) Rusting is caused due to combined action of air, moisture and carbon dioxide (B) During rusting, first ferrous bicarbonates are formed (C) On further oxidation ferrous bicarbonates get converted to ferric bicarbonates (D) All the above

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Last Answer : Answer: Option D

Oxide layer formed on the non-ferrous metal surface after its annealing is (A) Removed by acid pickling (B) Hammered into the surface (C) Removed with coarse emery cloth

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Explain The Difference Between Pear Lite And Cementite?

Description : Explain The Difference Between Pear Lite And Cementite?

Last Answer : Pearlite is a eutectoid mixture of ferrite and cementite. Cementide is a chemical compound of iron and carbon.

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

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Last Answer : ANSWER: W -- COKE

Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous

Description : Name the material which is separated from molten steel during chemical reaction of A.T welding? (i) Aluminium oxide (slag). * (ii) Ferrous Oxide (iii) Aluminium (iv) Ferrous

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What is austenite ?

Description : What is austenite ?

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What is the difference between austenite stabilisers and ferrite stabilisers ?

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Last Answer : Austenite stabilisers have the effect of extending the temperature range overwhich austenite is formed. Such elements are carbon, manganese, nickel, copper and cobalt. Ferrite stabilisers have the ... is formed. Such elements are silicon, chromium, molybdenum, tungsten, titanium and niobium.

Explain the difference between ferrite, austenite and graphite ?

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