Identify the correct statement.

Question

Identify the correct statement.

A. Sphlerite is zinc oxide

B. The first law of the thermodynamics is stated as δE = δQ - δW

C. Lead can be produced in a blast furnace

D. T. ferrooxidans is a fungus that can be used for leaching chalcopyrite

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Comment

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

A. 7

B. 10

C. 12

D. 17

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Normalising does not __________ of a metal.

A. Improve machinability & tensile strength

B. Remove internal stresses

C. Refine the structure

D. Remove strains caused by cold working

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Which of the following is the most wear resistant grade of carbide used for the cutting tools?

A. Aluminium carbide

B. Tungsten carbide

C. Nickel carbide

D. Iron carbide

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The refrigerant freon-12 is chemically

A. CCl₂F₂

B. CCl₃F

C. CClF₃

D. CCl₄F

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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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Atomic __________ is a whole number for an element.

A. Number

B. Weight

C. Radius

D. None of these

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What is the pH of distilled water?

A. 0

B. 1

C. 7

D. 14

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The activity of pure hydrogen gas at 1000°C and 5 atm pressure

A. Is always less than 1

B. Is always greater than 1

C. Can be 5

D. Depends on the choice of the standard state

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Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

A. Output & fineness

B. Velocity

C. Both (A) & (B)

D. None of these

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Out of the following, which will fracture most readity, when hit with a hard hammer?

A. Brass

B. Bronze

C. German silver

D. Cast iron

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__________ has a negative co-efficient of linear expansion.

A. Iron

B. Copper

C. Rubber

D. Nickel

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Hardening of steel is not possible, unless it is heated __________ critical point.

A. Above the highest

B. Above the lowest

C. Between the first & second

D. Between the second & third

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Damage to metal surface by mechanical action is called

A. Pitting

B. Corrosion

C. Erosion

D. None of these

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Ammonia gas can be dried by

A. PCl₅

B. Quick lime

C. CaCl₂

D. Concentrated H₂SO₄

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Powder metallurgy is used to produce

A. High precision components with complex cavities and sharp features

B. Components of large size

C. Porosity free components

D. Components of such alloys whose constituents do not form alloys readily

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During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to

A. Time

B. Square root of time

C. Square of time

D. Cube of time

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In TIG welding, thoriated tungsten electrodes are used, because it

A. Has higher current carrying capacity

B. Has better electron emissivity

C. Is stronger than ordinary tungsten

D. Is easy to prepare

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Rankine cycle comprises of two isothermal and two __________ processes.

A. Isobaric

B. Polytropic

C. Isentropic

D. None of these

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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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The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

A. 140

B. 180

C. 240

D. 280

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The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A. Carbon

B. Manganese

C. Both 'a' nor 'b'

D. Neither 'a' nor 'b'

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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

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In a neutral solution

A. H⁺ ions are absent

B. OH^- ions are absent

C. Both H⁺ and OH^- ions are present in very small but equal concentration

D. None of these

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A compact estimate about the amount of materials handling between various work stations is obtained from the

A. Gantt chart

B. Bin chart

C. String diagram

D. Travel chart

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The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

A. Fatigue strength

B. Creep strength

C. Resilience

D. Endurance limit

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The most important requirement for aluminium industry is the availability of cheap

A. Ore

B. Electrical power

C. Labour

D. Abundant water

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__________ metal is used as a bearing liner material.

A. Pewter

B. White

C. Babbitt

D. Gun

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Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

A. Hexagonal close, packed (hcp)

B. Face centred cubic (fcc)

C. Body centred cubic (bcc)

D. Simple cubic

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The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.

A. Air

B. Water

C. Mercury

D. Alcohol

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Which of the following materials has the least scrap value?

A. Aluminium

B. Stainless steel

C. Brass

D. Copper

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Accepted Answer

C. Lead can be produced in a blast furnace

Identify the correct statement.

Correct Answer :

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Related Questions

Minimum number of members required to form a Public Limited Joint Stock Com-pany is

Normalising does not __________ of a metal.

Which of the following is the most wear resistant grade of carbide used for the cutting tools?

The refrigerant freon-12 is chemically

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

Atomic __________ is a whole number for an element.

What is the pH of distilled water?

The activity of pure hydrogen gas at 1000°C and 5 atm pressure

Which of the following varies as the square root of oil pressure during atomisation of fuel oil through a pressure jet burner?

Out of the following, which will fracture most readity, when hit with a hard hammer?

__________ has a negative co-efficient of linear expansion.

Hardening of steel is not possible, unless it is heated __________ critical point.

Damage to metal surface by mechanical action is called

Ammonia gas can be dried by

Powder metallurgy is used to produce

During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to

In TIG welding, thoriated tungsten electrodes are used, because it

Rankine cycle comprises of two isothermal and two __________ processes.

__________ cannot increase the fatigue strength of a material.

The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to __________ °D.

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

With decrease in the grain size of a material, its creep resistance

In a neutral solution

A compact estimate about the amount of materials handling between various work stations is obtained from the

The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

The most important requirement for aluminium industry is the availability of cheap

__________ metal is used as a bearing liner material.

Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.

The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.

Which of the following materials has the least scrap value?

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