Nitriding of a steel part does not increase its

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Nitriding of a steel part does not increase its

A. Grain size

B. Fatigue limit

C. Surface hardness

D. Wear resistance

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Case hardening of a material is

A. Followed by tempering or carburising

B. Preceded by its tempering

C. Done to get a soft ductile interior with a very hard surface

D. Carried out to get extreme hardness in its core

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The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10^-16 m²S^-1 and it is 1.94 × 10^-14 m²S^{- 1} at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

A. 130

B. 180

C. 230

D. 250

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Pick out the correct combination about the role of various additives used in polymers.

A. Plasticiser: increases the polymer strength

B. Heat stabiliser: increases the maximum service temperature

C. Fillers: Does not affect the property of polymer but increases its weight

D. Lubricants: increases the flexibility of polymers

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Pick out the wrong statement.

A. Lead can creep under its own weight at room temperature

B. The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement

C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal

D. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

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Which of the following materials has the poorest electrical conductivity?

A. Carbon

B. Aluminium

C. Silver

D. Stainless steel

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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

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When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the

A. Partial pressure of water vapour is less than the total pressure

B. Humidity is < 100% & dew point temperature of air has not reached

C. Dew point temperature of air has not reached & air is not saturated fully

D. Air is fully saturated

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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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Hydro-cyclone is a

A. Crusher

B. wet classifier

C. Dry classifier

D. Magnetic separator

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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

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Uniform ramming of sand in green sand moulding process leads to

A. Reduced chance of gas porosity

B. Greater dimensional stability of the casting

C. Uniform flow of molten metal into the mould cavity

D. Less sand expansion type of casting defect

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The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

A. Red

B. Extended

C. Super

D. Extreme

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Atomic __________ is a whole number for an element.

A. Number

B. Weight

C. Radius

D. None of these

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Copper deposits are found in India at the following location:

A. Kudremukh

B. Kolar

C. Khetri

D. Ramagundam

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When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively

A. Decreases & increases

B. Increases & increases

C. Increases & decreases

D. Decreases & decreases

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Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

A. 746

B. 3000

C. 1000

D. 550

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The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong

A. Base and strong acid

B. Base and weak acid

C. Acid and weak base

D. None of these

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Calorific value of __________ are almost same.

A. Lignite & anthracite coal

B. Lignite & coal gas

C. Petrol & diesel

D. Coal gas & natural gas

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Plants produce carbohydrates from the CO2 present in the atmosphere by

A. Polymerisation

B. Photochemical reaction

C. Oxidation

D. None of these

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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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While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

A. 1800

B. 2000

C. 2400

D. 3000

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Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

A. E = 2G (1 + v)

B. E = G (1 + v)

C. E = G (1 + v)/2

D. E = 2G (1 + 2v)

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During sensible heating of humid air

A. Relative humidity increases

B. Dew point remains constant

C. Dry bulb & wet bulb temperature increases

D. Both 'b' & 'c'

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__________ cannot increase the fatigue strength of a material.

A. Grain refining

B. Grain coarsening

C. Surface hardening

D. Shot peening

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Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?

A. Small punches, broaches reamers and springs

B. Cutlery, screws, rivets and files

C. Mandrels, twist drills, small lathe tools and razors

D. Forgings like can shaft, structural steel plate, threading dies and drawing dies

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Which of the following has the highest modulus of elasticity (about 7 × 10⁶ kg/cm²)?

A. High speed steel

B. Stainless steel

C. Tungsten carbide

D. Superalloys

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Main constituent of bone ash is

A. Ammonium phosphate

B. Calcium phosphate

C. Animal charcoal

D. Ammonium sulphate

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Ultimate strength in tension as compared to that in shear for steel is

A. Half

B. One third

C. One and half times

D. One fourth

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Addition of __________ to steel does not help in improving its machinability.

A. Sulphur

B. Silicon

C. Lead

D. Phosphorous

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In the diving apparatus, helium is used along with oxygen, because it is

A. Easily available

B. Not soluble in blood at high pressure

C. Lighter than nitrogen

D. Completely miscible with oxygen

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Accepted Answer

A. Grain size

Nitriding of a steel part does not increase its

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Case hardening of a material is

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10^-16 m²S^-1 and it is 1.94 × 10^-14 m²S^{- 1} at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

Pick out the correct combination about the role of various additives used in polymers.

Pick out the wrong statement.

Which of the following materials has the poorest electrical conductivity?

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the

Cold chisels hammers are made of

Hydro-cyclone is a

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

Uniform ramming of sand in green sand moulding process leads to

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

Atomic __________ is a whole number for an element.

Copper deposits are found in India at the following location:

When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively

Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong

Calorific value of __________ are almost same.

Plants produce carbohydrates from the CO2 present in the atmosphere by

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

While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

During sensible heating of humid air

__________ cannot increase the fatigue strength of a material.

Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?

Which of the following has the highest modulus of elasticity (about 7 × 10⁶ kg/cm²)?

Main constituent of bone ash is

Ultimate strength in tension as compared to that in shear for steel is

Addition of __________ to steel does not help in improving its machinability.

In the diving apparatus, helium is used along with oxygen, because it is

Also checkout

Nitriding of a steel part does not increase its

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Case hardening of a material is

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10-16 m2S-1 and it is 1.94 × 10-14 m2S- 1 at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

Pick out the correct combination about the role of various additives used in polymers.

Pick out the wrong statement.

Which of the following materials has the poorest electrical conductivity?

Addition of small amount of __________ to grey cast iron is done to produce nodular grey cast iron.

When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the

Cold chisels hammers are made of

Hydro-cyclone is a

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

Uniform ramming of sand in green sand moulding process leads to

The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

Atomic __________ is a whole number for an element.

Copper deposits are found in India at the following location:

When the wet steam is throttled but still remains wet at the exit of the throttle valve, then its temperature & dryness fraction respectively

Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

The heat of neutralisation remains constant, when there is a reaction between dilute solutions of strong

Calorific value of __________ are almost same.

Plants produce carbohydrates from the CO2 present in the atmosphere by

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

While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.

Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

During sensible heating of humid air

__________ cannot increase the fatigue strength of a material.

Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?

Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2)?

Main constituent of bone ash is

Ultimate strength in tension as compared to that in shear for steel is

Addition of __________ to steel does not help in improving its machinability.

In the diving apparatus, helium is used along with oxygen, because it is

Also checkout

The diffusion co-efficient of Ni in Cu at 1000 K is 1.93 × 10^-16 m²S^-1 and it is 1.94 × 10^-14 m²S^{- 1} at 1200 K. The activation energy (in k. J.mole-1) for the diffusion of Ni in Cu is

Which of the following has the highest modulus of elasticity (about 7 × 10⁶ kg/cm²)?