Annealing of cast iron (A) Softens it to facilitate machining (B) Decreases the free carbon (C) Increases the strength (D) None of these

Annealing of cast iron
(A) Softens it to facilitate machining
(B) Decreases the free carbon
(C) Increases the strength
(D) None of these
by

1 Answer

Answer :

Option A
by

Related questions

Pick out the wrong statement. (A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action (B) Soap powder is prepared by mixing soap with hydrated sodium carbonate (C) Detergents differ from soaps in their action in hard water (D) Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Description : Pick out the wrong statement. (A) Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action (B) Soap powder is ... ., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Last Answer : (D) Tarnish inhibitor (e.g., Benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

Compressed dry air is used as the cutting fluid, while machining (A) Steel (B) Cast iron (C) Aluminium (D) None of these

Description : Compressed dry air is used as the cutting fluid, while machining (A) Steel (B) Cast iron (C) Aluminium (D) None of these

Last Answer : Option B

__________ 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

With increase in carbide/graphite ratio in cast iron, its (A) Hardness & brittleness increases (B) Ductility decreases (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : With increase in carbide/graphite ratio in cast iron, its (A) Hardness & brittleness increases (B) Ductility decreases (C) Both (A) and (B) (D) Neither (A) nor (B)

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

Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength

Description : Presence of high phosphorous in cast iron increases its (A) Fluidity (B) Melting point (C) Shrinkage (D) Tensile strength

Last Answer : (A) Fluidity

Welded joint strength increases due to annealing by i. 6% ii. 10% iii. 14% iv. None

Description : Welded joint strength increases due to annealing by i. 6% ii. 10% iii. 14% iv. None

Last Answer : i. 6%

Which of the following has the highest compressive strength? (A) Wrought iron (B) Cast iron (C) Mild steel (D) High carbon steel

Description : Which of the following has the highest compressive strength? (A) Wrought iron (B) Cast iron (C) Mild steel (D) High carbon steel

Last Answer : (D) High carbon steel

Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron Answer: Option C

Description : Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron Answer: Option C

Last Answer : (C) Cast iron

Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron

Description : Which of the following has the least value of ultimate tensile strength (UTS)? (A) Medium carbon steel (B) High carbon steel (C) Cast iron (D) Wrought iron

Last Answer : Option B

A coal that softens and fuses on heating is (A) Classified (B) Carbonised (C) Caking (D) Non-caking

Description : A coal that softens and fuses on heating is (A) Classified (B) Carbonised (C) Caking (D) Non-caking

Last Answer : (C) Caking

__________ property of steel increases by addition of large amount of silicon in it. (A) Mechanical (B) Machining (C) Magnetic (D) Refractory

Description : __________ property of steel increases by addition of large amount of silicon in it. (A) Mechanical (B) Machining (C) Magnetic (D) Refractory

Last Answer : Option C

With increase in annealing temperature, the following defect density decreases. (A) Vacancy (B) Dislocation (C) Grain boundary (D) All of these

Description : With increase in annealing temperature, the following defect density decreases. (A) Vacancy (B) Dislocation (C) Grain boundary (D) All of these

Last Answer : Option D

Cupola produces __________ iron. (A) Pig (B) Cast (C) Wrought (D) Carbon free

Description : Cupola produces __________ iron. (A) Pig (B) Cast (C) Wrought (D) Carbon free

Last Answer : (B) Cast

In planning and construction of a cast metal partial denture the study cast, M07 A. facilitate the construction of custom/special trays B. minimize the need for articulating C. provide only limited information about inter ridge distance, which is best assessed clinically D. can be used as a working cast when duplicating facilities are not available

Description : In planning and construction of a cast metal partial denture the study cast, M07 A. facilitate the construction of custom/special trays B. minimize the need for articulating C. provide only ... best assessed clinically D. can be used as a working cast when duplicating facilities are not available

Last Answer : A. facilitate the construction of custom/special trays

Cast iron has (A) Very high tensile strength (B) High ductility (C) High malleability (D) Elastic limit close to ultimate breaking strength

Description : Cast iron has (A) Very high tensile strength (B) High ductility (C) High malleability (D) Elastic limit close to ultimate breaking strength

Last Answer : (D) Elastic limit close to ultimate breaking strength

Cast iron has very high (A) Compressive strength (B) Ductility (C) Shock resistance (D) Resistance to brittleness

Description : Cast iron has very high (A) Compressive strength (B) Ductility (C) Shock resistance (D) Resistance to brittleness

Last Answer : (A) Compressive strength

Cast iron has (A) High ductility (B) High malleability (C) Very high tensile strength (D) Its elastic limit very close to ultimate breaking strength

Description : Cast iron has (A) High ductility (B) High malleability (C) Very high tensile strength (D) Its elastic limit very close to ultimate breaking strength

Last Answer : (D) Its elastic limit very close to ultimate breaking strength

For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is (A) Stainless steel (B) Cast iron (C) Aluminium (D) Nickel

Description : For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is (A) Stainless steel (B) Cast iron (C) Aluminium (D) Nickel

Last Answer : (B) Cast iron

Cast iron compared to steel is better in (A) Ductility (B) Fluidity & castability (C) Strength (D) Malleability

Description : Cast iron compared to steel is better in (A) Ductility (B) Fluidity & castability (C) Strength (D) Malleability

Last Answer : (B) Fluidity & castability

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

Cast iron is having very high (A) Proximity between its elastic limit and ultimate breaking strength (B) Ductility (C) Tensile strength (D) All (A), (B) and (C)

Description : Cast iron is having very high (A) Proximity between its elastic limit and ultimate breaking strength (B) Ductility (C) Tensile strength (D) All (A), (B) and (C)

Last Answer : (A) Proximity between its elastic limit and ultimate breaking strength

Cast iron is (A) Used for making shock resisting parts (B) Manufactured in cupola and is brittle (C) Having compressive strength more than its tensile strength(D) All (A), (B) & (C)

Description : Cast iron is (A) Used for making shock resisting parts (B) Manufactured in cupola and is brittle (C) Having compressive strength more than its tensile strength (D) All (A), (B) & (C)

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

Cast irons are generally specified by their (A) Carbon content (B) Tensile strength (C) Hardness (D) Manufacturing process

Description : Cast irons are generally specified by their (A) Carbon content (B) Tensile strength (C) Hardness (D) Manufacturing process

Last Answer : (B) Tensile strength

The purpose of providing expansion bellows in the shell of tubular exchanger is to (A) Increase the heating load (B) Impart structural strength(C) Account for the uneven expansion of shell and tube bundles(D) Facilitate increase of shell length, if needed

Description : The purpose of providing expansion bellows in the shell of tubular exchanger is to (A) Increase the heating load (B) Impart structural strength (C) Account for the uneven expansion of shell and tube bundles (D) Facilitate increase of shell length, if needed

Last Answer : (C) Account for the uneven expansion of shell and tube bundles

Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon gases carburise the surface of steel at annealing temperatures (C) Active nitrogen (formed by cracking ammonia at the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Description : Pick out the wrong statement. (A) Addition of methane to the furnace atmosphere reduces decarburising by hydrogen (B) Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon ... the metal surface) cause nitride formation with increase in surface hardness (D) None of these

Last Answer : (D) None of these

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is (A) Full annealing (B) Bright annealing (C) Patenting (D) None of these

Description : The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is (A) Full annealing (B) Bright annealing (C) Patenting (D) None of these

Last Answer : C) Patenting

Presence of high amount of silicon in cast iron (A) Suppresses the decomposition of Fe3C (B) Increases the formation of graphite (C) Increases the contraction of the metal (D) Reduces its fluidity

Description : Presence of high amount of silicon in cast iron (A) Suppresses the decomposition of Fe3C (B) Increases the formation of graphite (C) Increases the contraction of the metal (D) Reduces its fluidity

Last Answer : (B) Increases the formation of graphite

Addition of silicon to cast iron (A) Promotes graphite module formation (B) Improves its ductility (C) Does not promote graphite flakes formation (D) Increases the fluidity of molten metal

Description : Addition of silicon to cast iron (A) Promotes graphite module formation (B) Improves its ductility (C) Does not promote graphite flakes formation (D) Increases the fluidity of molten metal

Last Answer : Option D

Vulcanisation of rubber (A) Decreases its tensile strength (B) Increases its ozone & oxygen reactivity (C) Increases its oil & solvent resistance (D) Converts its plasticity into elasticity

Description : Vulcanisation of rubber (A) Decreases its tensile strength (B) Increases its ozone & oxygen reactivity (C) Increases its oil & solvent resistance (D) Converts its plasticity into elasticity

Last Answer : (D) Converts its plasticity into elasticity

Work hardening of a material (A) Decreases its tensile strength (B) Decreases its ductility (C) Increases its ductility (D) Does not affect its ductility

Description : Work hardening of a material (A) Decreases its tensile strength (B) Decreases its ductility (C) Increases its ductility (D) Does not affect its ductility

Last Answer : (B) Decreases its ductility

Vulcanisation of rubber (A) Decreases its tensile strength (B) Increases its ozone & oxygen reactivity (C) Increases its oil & solvent resistance (D) Converts its plasticity into elasticity

Description : Vulcanisation of rubber (A) Decreases its tensile strength (B) Increases its ozone & oxygen reactivity (C) Increases its oil & solvent resistance (D) Converts its plasticity into elasticity

Last Answer : (D) Converts its plasticity into elasticity

A flywheel is made of 1. cast iron 2. high strength steels 3. graphic fiber reinforced polymer 4. any one of the above materials

Description : A flywheel is made of 1. cast iron 2. high strength steels 3. graphic fiber reinforced polymer 4. any one of the above materials

Last Answer : 4. any one of the above materials

Which of the following is (are) true? (A) Cast iron has poor tensile strength compared to steel (B) Failure of cast iron flywheel is sudden and total (C) Machinability of cast iron flywheel is poor compared to steel flywheel (D) All of the above

Description : Which of the following is (are) true? (A) Cast iron has poor tensile strength compared to steel (B) Failure of cast iron flywheel is sudden and total (C) Machinability of cast iron flywheel is poor compared to steel flywheel (D) All of the above

Last Answer : (D) All of the above

Flywheel are generally made from (A) Cast Iron (B) High strength steel (C) Ceramics (D) All of the above

Description : Flywheel are generally made from (A) Cast Iron (B) High strength steel (C) Ceramics (D) All of the above

Last Answer : (D) All of the above

The cast iron pipes for water supply system are used for (A) Durability (B) Strength (C) Easy connection (D) All the above

Description : The cast iron pipes for water supply system are used for  (A) Durability  (B) Strength  (C) Easy connection  (D) All the above

Last Answer : (D) All the above

Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is (A) (i) and (ii) (B) (ii) and (iii) (C) (iii) and (iv) (D) (i) and (iv)

Description : Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is (A) (i) and (ii) (B) (ii) and (iii) (C) (iii) and (iv) (D) (i) and (iv)

Last Answer : Answer: Option D

Which of the following is not recommended by ASME B31.3 when assembling gray cast iron flanges? a) Use high strength bolting at all times. b) Carefully align the flanges. c) Carefully control bolt torque. d) Ensure piping loads transmitted to the flanges are within design conditions.

Description : Which of the following is not recommended by ASME B31.3 when assembling gray cast iron flanges? a) Use high strength bolting at all times. b) Carefully align the flanges. c) Carefully control bolt torque. d) Ensure piping loads transmitted to the flanges are within design conditions.

Last Answer : a) Use high strength bolting at all times.

Which one contains the least percentage of carbon?(A) Wrought iron (B) High speed steel (C) Cast iron (D) Pig iron

Description : Which one contains the least percentage of carbon? (A) Wrought iron (B) High speed steel (C) Cast iron (D) Pig iron

Last Answer : (A) Wrought iron

Which of the following has the least carbon percentage? (A) Low carbon steel (B) Mild steel (C) Wrought iron (D) White cast iron

Description : Which of the following has the least carbon percentage? (A) Low carbon steel (B) Mild steel (C) Wrought iron (D) White cast iron

Last Answer : (C) Wrought iron

Carbon percentage is the same in cast iron and (A) Wrought iron(B) Pig iron(C) Mild steel(D) High silicon (14%) iron

Description : Carbon percentage is the same in cast iron and (A) Wrought iron (B) Pig iron (C) Mild steel (D) High silicon (14%) iron

Last Answer : (B) Pig iron

Which one is remelted and poured into moulds to get cast iron? (A) Wrought iron (B) Pig iron (C) Low carbon steel (D) Mild steel

Description : Which one is remelted and poured into moulds to get cast iron? (A) Wrought iron (B) Pig iron (C) Low carbon steel (D) Mild steel

Last Answer : (B) Pig iron

Water gas generator is made of (A) Carbon steel-brick lined (B) Stainless steel-lead lined (C) Cast iron (D) High carbon steel-porcelain lined

Description : Water gas generator is made of (A) Carbon steel-brick lined (B) Stainless steel-lead lined (C) Cast iron (D) High carbon steel-porcelain lined

Last Answer : (A) Carbon steel-brick lined

In the Kraft (sulphate) process for the paper manufacture, the digestor is made of (A) Cast iron (B) Stainless steel (C) Karbate carbon (D) Wrought iron

Description : In the Kraft (sulphate) process for the paper manufacture, the digestor is made of (A) Cast iron (B) Stainless steel (C) Karbate carbon (D) Wrought iron

Last Answer : (B) Stainless steel

Ball bearings are generally made of (A) Plain carbon steel (B) Chrome carbon steel (C) Stainless steel (D) Malleable cast iron

Description : Ball bearings are generally made of (A) Plain carbon steel (B) Chrome carbon steel (C) Stainless steel (D) Malleable cast iron

Last Answer : (B) Chrome carbon steel

Carbon is present in the uncombined (graphitic) form in case of (A) Cast iron (B) Steel (C) Ferroalloy (D) None of these

Description : Carbon is present in the uncombined (graphitic) form in case of (A) Cast iron (B) Steel (C) Ferroalloy (D) None of these

Last Answer : (A) Cast iron

Aqueous nitric acid is stored in __________ vessel. (A) Plain carbon steel (B) Stainless steel (C) Cast iron (D) Thermosetting plastic material

Description : Aqueous nitric acid is stored in __________ vessel. (A) Plain carbon steel (B) Stainless steel (C) Cast iron (D) Thermosetting plastic material

Last Answer : (C) Cast iron

Galvanising is generally done on (A) Non-ferrous metals (B) Low carbon steel (C) Stainless steel (D) Cast iron

Description : Galvanising is generally done on (A) Non-ferrous metals (B) Low carbon steel (C) Stainless steel (D) Cast iron

Last Answer : (B) Low carbon steel

Mixing vessel used for the chlorination of methane to produce methyl chloride is made of (A) Copper (B) Cast iron (C) Aluminium (D) High carbon steel

Description : Mixing vessel used for the chlorination of methane to produce methyl chloride is made of (A) Copper (B) Cast iron (C) Aluminium (D) High carbon steel

Last Answer : (B) Cast iron