The hardenability of steel decreases with (A) Decrease in dislocation density (B) Increase in solutionising temperature (C) Increase in strength (D) Decrease in grain size

The hardenability of steel decreases with
(A) Decrease in dislocation density
(B) Increase in solutionising temperature
(C) Increase in strength
(D) Decrease in grain size
by

1 Answer

Answer :

D) Decrease in grain size
by

Related questions

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

Maximum hardenability of steel depends upon its (A) Chemical composition (B) Carbon content (C) Grain size (D) Alloying elements content

Description : Maximum hardenability of steel depends upon its (A) Chemical composition (B) Carbon content (C) Grain size (D) Alloying elements content

Last Answer : Option D

__________ 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)

Dislocation cross-slip is difficult in those materials, which have (A) Large number of slip systems (B) High work hardening rate (C) Coarse grain size (D) Low stacking fault energy

Description : Dislocation cross-slip is difficult in those materials, which have (A) Large number of slip systems (B) High work hardening rate (C) Coarse grain size (D) Low stacking fault energy

Last Answer : (D) Low stacking fault energy

With decrease in the grain size of a material, its creep resistance (A) Increases (B) Decreases (C) Remain constant (D) Either (A) or (B); depends on the material

Description : With decrease in the grain size of a material, its creep resistance (A) Increases (B) Decreases (C) Remain constant (D) Either (A) or (B); depends on the material

Last Answer : (C) Remain constant

Between 230 and 370°C, blue brittleness is caused in mild steel because of the (A) Immobility of dislocation (B) Strain-ageing (C) Increase in Young's modulus (D) Strain hardening

Description : Between 230 and 370°C, blue brittleness is caused in mild steel because of the (A) Immobility of dislocation (B) Strain-ageing (C) Increase in Young's modulus (D) Strain hardening

Last Answer : Option B

__________ 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

.Increase the grain/non grain ratio on the shoe tends to the shoe losses (a) Decreases (b) Increases (c) Decrease or increase (d) Equal

Description : .Increase the grain/non grain ratio on the shoe tends to the shoe losses (a) Decreases (b) Increases (c) Decrease or increase (d) Equal

Last Answer : (d) Equal

Cold work tool steel should have (A) High toughness (B) Poor hardenability (C) High wear resistance (D) All (A), (B) & (C)

Description : Cold work tool steel should have (A) High toughness (B) Poor hardenability (C) High wear resistance (D) All (A), (B) & (C)

Last Answer : (C) High wear resistance

High speed steel should have high (A) Toughness (B) Wear resistance (C) Hardenability (D) Both (B) & (C)

Description : High speed steel should have high (A) Toughness (B) Wear resistance (C) Hardenability (D) Both (B) & (C)

Last Answer : (D) Both (B) & (C)

Thermal conductivity of a gas at low density, __________ with increase in temperature. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the gas

Description : Thermal conductivity of a gas at low density, __________ with increase in temperature. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the gas

Last Answer : (B) Increases

Nitriding of a steel part does not increase its (A) Grain size (B) Fatigue limit (C) Surface hardness (D) Wear resistance

Description : Nitriding of a steel part does not increase its (A) Grain size (B) Fatigue limit (C) Surface hardness (D) Wear resistance

Last Answer : Option B

Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by sharing of electrons is present in all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Last Answer : Option A

High amount of sulphur and phosphorous in coke causes (A) Decrease in its calorific value (B) Increase in its strength(C) Brittleness of steel made by using it(D) None of these

Description : High amount of sulphur and phosphorous in coke causes (A) Decrease in its calorific value (B) Increase in its strength (C) Brittleness of steel made by using it (D) None of these

Last Answer : (C) Brittleness of steel made by using it

As distance increases, value of gravitational field strength A. also increases B. decreases C. remains constant D. may increase or decrease

Description : As distance increases, value of gravitational field strength A. also increases B. decreases C. remains constant D. may increase or decrease

Last Answer : decreases

In a deposit of normally consolidated clay (A) Effective stress increases with depth but water content of soil and undrained strength decrease with depth (B) Effective stress and water content increase with depth but undrained strength decreases with depth C) Effective stress and undrained strength increase with depth but water content decreases with depth (D) Effective stress, water content and undrained strength decrease with depth

Description : In a deposit of normally consolidated clay (A) Effective stress increases with depth but water content of soil and undrained strength decrease with depth (B) Effective stress and water ... decreases with depth (D) Effective stress, water content and undrained strength decrease with depth

Last Answer : C) Effective stress and undrained strength increase with depth but water content decreases with depth

The shear strength of a soil (A) Is directly proportional to the angle of internal friction of the soil (B) Is inversely proportional to the angle of internal friction of the soil (C) Decreases with increase in normal stress (D) Decreases with decrease in normal stress

Description : The shear strength of a soil (A) Is directly proportional to the angle of internal friction of the soil (B) Is inversely proportional to the angle of internal friction of the soil (C) Decreases with increase in normal stress (D) Decreases with decrease in normal stress

Last Answer : Answer: Option D

In soils having same values of plasticity index, if liquid limit is increased, then(A) Compressibility and permeability decrease and dry strength increases (B) Compressibility, permeability and dry strength decrease (C) Compressibility, permeability and dry strength increase (D) Compressibility and permeability increase and dry strength decreases

Description : In soils having same values of plasticity index, if liquid limit is increased, then (A) Compressibility and permeability decrease and dry strength increases (B) Compressibility, ... permeability and dry strength increase (D) Compressibility and permeability increase and dry strength decreases

Last Answer : Answer: Option D

After storage, the strength of cement (A) Decreases (B) Increases (C) Remains same (D) May increase or decrease

Description : After storage, the strength of cement (A) Decreases (B) Increases (C) Remains same (D) May increase or decrease

Last Answer : Answer: Option A

Which of the following statements is true? (a) Both salinity and density of sea increase with depth (b) Both salinity and density of sea decrease with depth (c) Salinity increase but density of sea deceases with depth (d) Salinity decreases but density of sea increases with depth

Description : Which of the following statements is true? (a) Both salinity and density of sea increase with depth (b) Both salinity and density of sea decrease with depth (c) Salinity increase but density of sea deceases with depth (d) Salinity decreases but density of sea increases with depth

Last Answer : Ans:(d)

The density of sea water increase as (a) depth and salinity decrease (b) depth decreases and salinity increases (c) depth increases and salinity decreases (d) depth and salinity increase

Description : The density of sea water increase as (a) depth and salinity decrease (b) depth decreases and salinity increases (c) depth increases and salinity decreases (d) depth and salinity increase

Last Answer : Ans:(d)

If cream is removed from milk, its density – (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Description : If cream is removed from milk, its density – (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Last Answer : (1) Increases Explanation: The density of pure fresh milk being on the average 1.032, while the density of fat globules is about 0.86. It follows that the removal of cream will increase the density, while the addition of water will decrease it.

The density of the liquid when heated (1) decreases (2) increases (3) does not change (4) may increase of decrease depending on pressure

Description : The density of the liquid when heated (1) decreases (2) increases (3) does not change (4) may increase of decrease depending on pressure

Last Answer : (1) decreases Explanation: The mass density of a material varies with temperature and pressure. Increasing the temperature of a substance (with some exceptions) decreases its density by increasing the volume of ... bottom to top of the fluid due to the decrease of the density of the heated fluid.

With the increase in the amount of compaction energy (A) Optimum water content increases but maximum dry density decreases (B) Optimum water content decreases but maximum dry density increases (C) Both optimum water content and maximum dry density increase (D) Both optimum water content and maximum dry density decrease

Description : With the increase in the amount of compaction energy (A) Optimum water content increases but maximum dry density decreases (B) Optimum water content decreases but maximum dry density increases ( ... and maximum dry density increase (D) Both optimum water content and maximum dry density decrease

Last Answer : Answer: Option B

When the compaction energy increases the compaction of soils: (a) Both of OMC and maximum dry density decrease (b) Both of OMC and maximum dry density increase (c) OMC decreases but maximum dry density decrease (c) OMC increases but maximum dry density increase

Description : When the compaction energy increases the compaction of soils: (a) Both of OMC and maximum dry density decrease (b) Both of OMC and maximum dry density increase (c) OMC decreases but maximum dry density decrease (c) OMC increases but maximum dry density increase

Last Answer : (c) OMC decreases but maximum dry density decrease

If cream is removed from milk, its density (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Description : If cream is removed from milk, its density (1) Increases (2) Decreases (3) Remains the same (4) May increase or decrease

Last Answer : Increases

The density of the liquid when heated (1) decreases (2) increases (3) does not change (4) may increase of decrease depending on pressure

Description : The density of the liquid when heated (1) decreases (2) increases (3) does not change (4) may increase of decrease depending on pressure

Last Answer : decreases

Production rate __________ with increased fineness, with a given energy input to the size reduction machine. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the machine

Description : Production rate __________ with increased fineness, with a given energy input to the size reduction machine. (A) Decreases (B) Increases (C) Remains unchanged (D) May increase or decrease; depends on the machine

Last Answer : (A) Decreases

Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)

Description : Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)

Last Answer : (C) Creep resistance

On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is (A) Creep (B) Toughness (C) Tensile strength (D) Fatigue

Description : On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate is (A) Creep (B) Toughness (C) Tensile strength (D) Fatigue

Last Answer : (B) Toughnes

Yield strength of a polycrystalline metal with an average grain size ‘d’, is proportional to (A) d1/2 (B) d-1/2 (C) d (D) d-1

Description : Yield strength of a polycrystalline metal with an average grain size ‘d’, is proportional to (A) d1/2 (B) d-1/2 (C) d (D) d-1

Last Answer : (B) d-1/2

Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)

Description : Reduction in the grain size reduces the __________ of the material. (A) Fatigue resistance (B) Tensile strength (C) Creep resistance (D) All (A), (B) & (C)

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

The allowable shear stress in stiffened webs of mild steel beams decreases with (a) Decrease in the spacing of the stiffeners (b) Increase in the spacing of the stiffeners (c) Decrease in the effective depth (d) Increase in the effective depth

Description : The allowable shear stress in stiffened webs of mild steel beams decreases with (a) Decrease in the spacing of the stiffeners (b) Increase in the spacing of the stiffeners (c) Decrease in the effective depth (d) Increase in the effective depth

Last Answer : (b) Increase in the spacing of the stiffeners

The allowable shear stress in the web of mild steel beams decreases with (a) Decrease in h/t ratio (b) Increase in h/t ratio (c ) Decrease in thickness (d) Increase in height Where h is the height and t is the thickness

Description : The allowable shear stress in the web of mild steel beams decreases with (a) Decrease in h/t ratio (b) Increase in h/t ratio (c ) Decrease in thickness (d) Increase in height Where h is the height and t is the thickness

Last Answer : (b) Increase in h/t ratio

________ cannot increase the fatigue strength of a material. (A) Grain refining (B) Grain coarsening (C) Surface hardening (D) Shot peening

Description : ________ cannot increase the fatigue strength of a material. (A) Grain refining (B) Grain coarsening (C) Surface hardening (D) Shot peening

Last Answer : (B) Grain coarsening

Ultimate strength of cold drawn high steel wires (A) Increases with increase in diameter of bar (B) Decreases with increase in diameter of bar (C) Does not depend on diameter of bar (D) None of the above

Description : Ultimate strength of cold drawn high steel wires (A) Increases with increase in diameter of bar (B) Decreases with increase in diameter of bar (C) Does not depend on diameter of bar (D) None of the above

Last Answer : Answer: Option B

High carbon content in the steel causes (A) Decrease in tensile strength but increase in ductility (B) Increase in tensile strength but decrease in ductility (C) Decrease in both tensile strength and ductility (D) Increase in both tensile strength and ductility

Description : High carbon content in the steel causes (A) Decrease in tensile strength but increase in ductility (B) Increase in tensile strength but decrease in ductility (C) Decrease in both tensile strength and ductility (D) Increase in both tensile strength and ductility

Last Answer : Answer: Option B

For 275 kV transformers, using cold rolled grain oriented steel, which of the following values of flux density may be used? (a) 1.0 Wb/m2 (b) 1.1 Wb/m2 (c) 1.3 Wb/m2 (d) 1.6 Wb/m2 (e) None of the above

Description : For 275 kV transformers, using cold rolled grain oriented steel, which of the following values of flux density may be used? (a) 1.0 Wb/m2 (b) 1.1 Wb/m2 (c) 1.3 Wb/m2 (d) 1.6 Wb/m2 (e) None of the above

Last Answer : (d) 1.6 Wb/m2

Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction (A) Decreases with decrease of thickness of the flakes(B) Increases with the increasing flake size keeping the flake thicknessconstant(C) Increases considerably with the rise of temperature(D) Decreases as the moisture content of flakes increases

Description : Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction (A) Decreases with decrease of thickness of the flakes (B) Increases with the increasing flake size ... considerably with the rise of temperature (D) Decreases as the moisture content of flakes increases

Last Answer : (D) Decreases as the moisture content of flakes increases

Temperature of the product during ultrafine grinding (A) Increases (B) Decreases (C) Remain constant (D) May increase or decrease; depends on the material being ground

Description : Temperature of the product during ultrafine grinding (A) Increases (B) Decreases (C) Remain constant (D) May increase or decrease; depends on the material being ground

Last Answer : (A) Increases

Dew point of a gas-vapour mixture (A) Increases with temperature rise (B) Decreases with temperature rise (C) Decreases with decrease in pressure (D) Increases with increase in pressure

Description : Dew point of a gas-vapour mixture (A) Increases with temperature rise (B) Decreases with temperature rise (C) Decreases with decrease in pressure (D) Increases with increase in pressure

Last Answer : (C) Decreases with decrease in pressure

During constant rate period, the rate of drying decreases with the (A) Decrease in air temperature (B) Increase in air humidity (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : During constant rate period, the rate of drying decreases with the (A) Decrease in air temperature (B) Increase in air humidity (C) Both (A) and (B) (D) Neither (A) nor (B)

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

Molecular diffusivity of a liquid (A) Increases with temperature (B) Decreases with temperature (C) May increase or decrease with temperature (D) Is independent of temperature

Description : Molecular diffusivity of a liquid (A) Increases with temperature (B) Decreases with temperature (C) May increase or decrease with temperature (D) Is independent of temperature

Last Answer : (A) Increases with temperature

With the increase of temperature, the Col-burn jH factor (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depending on temperature

Description : With the increase of temperature, the Col-burn jH factor (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depending on temperature

Last Answer : (A) Increases

Thermal conductivities of most of the liquids __________ with rise in temperature.(A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on the liquid

Description : Thermal conductivities of most of the liquids __________ with rise in temperature. (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on the liquid

Last Answer : (B) Decreases

With increase in temperature, the thermal conductivity of fresh lubricating oil (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on its composition

Description : With increase in temperature, the thermal conductivity of fresh lubricating oil (A) Increases (B) Decreases (C) Remains unchanged (D) May increase or decrease; depends on its composition

Last Answer : (B) Decreases

The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. (A) Increases (B) Decreases (C) Remain constant (D) May increase or decrease; depends on the material

Description : The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. (A) Increases (B) Decreases (C) Remain constant (D) May increase or decrease; depends on the material

Last Answer : (D) May increase or decrease; depends on the material

With increase in temperature, the thermal conductivity of a gas (A) Increases (B) Decreases (C) Remain same (D) May increase or decrease depending on the type of gas

Description : With increase in temperature, the thermal conductivity of a gas (A) Increases (B) Decreases (C) Remain same (D) May increase or decrease depending on the type of gas

Last Answer : (A) Increases

With increase in the temperature, viscosity of a liquid (A) Increases (B) Decreases (C) Remain constant (D) May increase or decrease; depends on the liquid

Description : With increase in the temperature, viscosity of a liquid (A) Increases (B) Decreases (C) Remain constant (D) May increase or decrease; depends on the liquid

Last Answer : (B) Decreases

The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated. (A) Decreases (B) Increases (C) Remain constant (D) May increase or decrease; depends on the chemical characteristics of polluted water

Description : The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated. (A) Decreases (B) Increases (C) Remain constant (D) May increase or decrease; depends on the chemical characteristics of polluted water

Last Answer : (A) Decreases