The hardenability of steel decreases with

Question

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

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Ceramic compounds as compared to metallic compounds

A. Crystallise faster

B. Resist greater tensile stress at room temperature

C. Have higher melting temperature

D. Are better conductor of electricity at higher temperature

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Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

A. Nitrate

B. Sulphate

C. Carbonate

D. Chloride

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Pick out the wrong statement.

A. Both annealing and normalising release the internal stresses of the material besides improving the mechanical properties

B. Low carbon steel does not respond to the heat treatment for hardening of the material, hence it is subjected to case hardening or surface hardening processes like cyaniding, carburising, nitriding etc., which produces high carbon outer layers resulting in increase of surface hardness

C. Induction hardening and flame hardening techniques are also used for surface hardening

D. Martempering of a material is a hardening process

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In the Bayer's process, bauxite is digested under pressure using

A. H₂SO₄

B. NaOH

C. NH₃

D. HCl

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Which of the following materials has the maximum shrinkage allowance?

A. Brass

B. Cast iron

C. Lead

D. Aluminium alloy

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Cold chisels hammers are made of

A. High speed steel

B. High carbon steel

C. Forged steel

D. Mild steel

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Which of the following is an ore dressing operation?

A. Classification

B. Smelting

C. Roasting

D. None of these

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Which of the following fastening devices has a head at one end and a nut fitted to the other?

A. Bolt

B. Stud

C. Top bolt

D. None of these

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Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

A. 0.5

B. 1

C. 1/3

D. 2.5

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Joining of thin foils is preferred to be done by

A. Gamma rays

B. X-rays

C. Microwaves

D. Gas welding

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In case of simple harmonic motion, displacement is proportional to the

A. Velocity

B. Acceleration

C. Both (A) & (B)

D. Neither (A) nor (B)

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The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

A. Wetness

B. Mass flow rate

C. Both 'a' & 'b'

D. Neither 'a' nor 'b'

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Non-ferrous alloys used for making cutting tools need not have high

A. Abrasion resistance

B. Toughness

C. Red hardness

D. Cutting speed

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Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

A. Cresylic acid

B. Xanthaies

C. Pine oil

D. All 'a' 'b' & 'c'

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Property responsible for the talcum powder to cling to the skin is the

A. Capillary action

B. Adhesion

C. Cohesion

D. Surface tension

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M10 index of coke indicates its

A. Compressive strength

B. Hardness

C. Abrasion resistance

D. Impact strength

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Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

A.

B.

C.

D.

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For the irreversible reaction, C_a+ 2C = C_a C₂ , Δ H°298 = - 60000 J . mole_-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

A. 30,000 J

B. 60,000 J

C. 90,000 J

D. 2,40,000 J

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Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.

A. Horizontal

B. Vertical

C. Inclined

D. Any

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Filler material used in welding should have __________ as compared to the parent metal to be welded.

A. Lower melting temperature

B. Same melting temperature

C. Same composition

D. Both 'b' & 'c'

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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

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The leaching solvent used in Baeyer's process for the purification of bauxite is

A. Ammonium hydroxide

B. Sodium carbonate

C. Sodium hydroxide

D. Ammonium carbonate

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Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

A. Elaiden test

B. Reichert-Meissl value test

C. Hunter value test

D. Iodine value test

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Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.

A. Cementite

B. Austenite

C. Martensite

D. Pearlite

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Materials having __________ lattice structure are usually the most ductile.

A. Body centred cubic (bcc)

B. Hexagonal close packed (hcp)

C. Face centred cubic (fcc)

D. None of these

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The normal stress is the same in all directions at a point in a fluid, only when the fluid

A. Is at rest & has zero viscosity

B. Is frictionless

C. Fluid layer has no motion relative to an adjacent layer of fluid

D. is incompressible & frictionless

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Ganister contains maximum percentage of

A. FeO

B. SiO2

C. MgO

D. MnO2

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The activity co-efficient of the solute in a dilute solution

A. Decreases with the increase of concentration of the solute

B. Increases with the increase of concentration of the solute

C. Remains constant

D. Is unity at infinite dilution

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The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

A. Rigid

B. Tough

C. Ductile

D. Plastic

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Which of the following forces does not act on a fluid at rest?

A. Viscous force

B. Gravity force

C. Hydrostatic force

D. Surface tension force

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Accepted Answer

D. Decrease in grain size

The hardenability of steel decreases with

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Ceramic compounds as compared to metallic compounds

Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

Pick out the wrong statement.

In the Bayer's process, bauxite is digested under pressure using

Which of the following materials has the maximum shrinkage allowance?

Cold chisels hammers are made of

Which of the following is an ore dressing operation?

Which of the following fastening devices has a head at one end and a nut fitted to the other?

Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

Joining of thin foils is preferred to be done by

In case of simple harmonic motion, displacement is proportional to the

The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

Non-ferrous alloys used for making cutting tools need not have high

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

Property responsible for the talcum powder to cling to the skin is the

M10 index of coke indicates its

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

For the irreversible reaction, C_a+ 2C = C_a C₂ , Δ H°298 = - 60000 J . mole_-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.

Filler material used in welding should have __________ as compared to the parent metal to be welded.

Secondary hardening in steels arises out of the

The leaching solvent used in Baeyer's process for the purification of bauxite is

Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.

Materials having __________ lattice structure are usually the most ductile.

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Ganister contains maximum percentage of

The activity co-efficient of the solute in a dilute solution

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

Which of the following forces does not act on a fluid at rest?

Also checkout

The hardenability of steel decreases with

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Ceramic compounds as compared to metallic compounds

Blasting of tri-nitro-toluene (TNT) is done by mixing it with ammonium

Pick out the wrong statement.

In the Bayer's process, bauxite is digested under pressure using

Which of the following materials has the maximum shrinkage allowance?

Cold chisels hammers are made of

Which of the following is an ore dressing operation?

Which of the following fastening devices has a head at one end and a nut fitted to the other?

Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxyacetylene welding is __________ Nm3.

Joining of thin foils is preferred to be done by

In case of simple harmonic motion, displacement is proportional to the

The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

Non-ferrous alloys used for making cutting tools need not have high

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?

Property responsible for the talcum powder to cling to the skin is the

M10 index of coke indicates its

Temperature profile along the length of a gasgas counter flow heat exchanger is correctly represented by

For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = - 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be

Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in __________ position.

Filler material used in welding should have __________ as compared to the parent metal to be welded.

Secondary hardening in steels arises out of the

The leaching solvent used in Baeyer's process for the purification of bauxite is

Which of the following test is used for distinguishing among dry oils, semi-drying oils and non drying oils?

Transformation range for ferrous material is the temperature interval during which __________ is formed during its heating.

Materials having __________ lattice structure are usually the most ductile.

The normal stress is the same in all directions at a point in a fluid, only when the fluid

Ganister contains maximum percentage of

The activity co-efficient of the solute in a dilute solution

The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as

Which of the following forces does not act on a fluid at rest?

Also checkout

Theoretical volume of oxygen required for complete combustion of 1Nm³ of acetylene, in oxyacetylene welding is __________ Nm³.

For the irreversible reaction, C_a+ 2C = C_a C₂ , Δ H°298 = - 60000 J . mole_-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be