Surface tension of a liquid

Question

Surface tension of a liquid

A. Is due to intermolecular forces of cohesion

B. Decreases with rise in temperature

C. Is responsible for the spherical shape of an isolated liquid drop

D. All (A), (B) & (C)

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What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.

A. 2

B. 8

C. 10

D. 40

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Fatigue resistance of a material is measured by the

A. Elastic limit

B. Ultimate tensile strength

C. Young's modulus

D. Endurance limit

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Use of flux during soldering is done to

A. Increase fluidity of solder by lowering its melting temperature

B. Prevent oxide formation

C. Wash away surplus solder

D. Full up the joint gap

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Which of the following materials does not form adherent oxide film on surface?

A. Copper

B. Nickel

C. Aluminium

D. Gold & silver

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Production of a hollow product by inflation of a tube or parison is called the __________ process.

A. Blow moulding

B. Calendaring

C. Extrusion

D. Injection

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Which of the following is not an ore of copper?

A. Cryolite

B. Azurite

C. Chalcopyrite

D. Malachite

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Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

A. 1

B. 10

C. 30

D. 50

Discuss this answer

Good design of the casing of a centrifugal pump aims at minimising the

A. Cavitation

B. Frictional losses

C. Kinetic energy loss

D. Static head

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A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to

A. √(Particle diameter)

B. Particle diameter

C. (Particle diameter)²

D. (Particle diameter)³

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For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot?

A. Temperature - entropy

B. Temperature - pressure

C. Enthalpy - entropy

D. Enthalpy-pressure

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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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Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A. Mach

B. Froude

C. Reynolds

D. Euler

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In inventory control theory, the economic order quantity (EOQ) is the

A. Lot size corresponding to break even analysis

B. Average level of inventory

C. Optimum lot size

D. None of these

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Hooke's law

A. Applies to elastic deformation

B. Applies beyond limit of proportionality in stress-strain curve

C. States that stress is inversely proportional to strain upto elastic limit

D. None of these

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In __________ process, there is an increase in entropy with no degradation of energy.

A. Isothermal expansion

B. Isochoric heat addition

C. Polytropic expansion

D. Isobaric heat addition

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With increase in temperature, the surface tension of water

A. Increases

B. Decreases

C. Remain constant

D. Increases linearly

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Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

A. Tensile strength

B. Compressive strength

C. Young's modulus

D. Thermal co-efficient of expansion

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Steel produced from phosphatic iron is __________ in nature.

A. Malleable

B. Ductile

C. Brittle

D. Tough

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Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

A. 2

B. 3

C. 0.8

D. 6

Discuss this answer

Pearlite comprises of

A. 87% cementite & 13% Fe

B. 87% ferrite & 13% cementite

C. 93.33% ferrite & 6.67% C

D. 87% ferrite & 13% C

Discuss this answer

Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.

A. X-rays

B. γ-rays

C. α-rays

D. β-rays

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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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Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

A. Sorbite

B. Bainite

C. Martensite

D. Troostite

Discuss this answer

Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of

A. 90% tungsten carbide and 10% cobalt

B. 70% aluminium oxide & 30% silica

C. 30% nickel, 15% chromium & 55% tungsten

D. 65% tungsten & 35% zirconium

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Pick out the correct statement.

A. Materials exhibiting high elasticity obey Hooke's law

B. The elastic behaviour of rubber under compression is the same as its behaviour under tension

C. The damping capacity of a material is due to its plastic deformation

D. The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations

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In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

A. 1

B. 1.4

C. 1.5

D. Y = C_p/C_v

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Gantt charts are used for streamlining the

A. Inventory control

B. Production schedule

C. Sales forecasting

D. Quality control

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Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

A. Working

B. Bearing

C. Yield

D. None of these

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Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

A. High vacuum

B. Zero pressure

C. 0°K

D. Earth's centre

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Preheating before welding is done to

A. Make the plate softer

B. Burn oil & grease sticking to plate surfaces

C. Avoid plate distortion

D. Prevent cold cracks

Discuss this answer

Accepted Answer

D. All (A), (B) & (C)

Surface tension of a liquid

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.

Fatigue resistance of a material is measured by the

Use of flux during soldering is done to

Which of the following materials does not form adherent oxide film on surface?

Production of a hollow product by inflation of a tube or parison is called the __________ process.

Which of the following is not an ore of copper?

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

Good design of the casing of a centrifugal pump aims at minimising the

A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to

For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot?

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.

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

In inventory control theory, the economic order quantity (EOQ) is the

Hooke's law

In __________ process, there is an increase in entropy with no degradation of energy.

With increase in temperature, the surface tension of water

Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

Steel produced from phosphatic iron is __________ in nature.

Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

Pearlite comprises of

Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.

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

Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of

Pick out the correct statement.

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

Gantt charts are used for streamlining the

Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

Preheating before welding is done to

Also checkout

Surface tension of a liquid

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.

Fatigue resistance of a material is measured by the

Use of flux during soldering is done to

Which of the following materials does not form adherent oxide film on surface?

Production of a hollow product by inflation of a tube or parison is called the __________ process.

Which of the following is not an ore of copper?

Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent.

Good design of the casing of a centrifugal pump aims at minimising the

A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to

For a thermodynamic system undergoing a process, which of the following pairs best expresses the relationship similar to that expressed by the pressure volume plot?

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.

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

In inventory control theory, the economic order quantity (EOQ) is the

Hooke's law

In __________ process, there is an increase in entropy with no degradation of energy.

With increase in temperature, the surface tension of water

Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal

Steel produced from phosphatic iron is __________ in nature.

Specific gravity of hot metal (pig iron) is __________ times that of the blast furnace slag.

Pearlite comprises of

Cobalt - 60 is used as a source of __________ in medical therapy & industrial radiography.

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

Austempering of steel requires it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to

Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of

Pick out the correct statement.

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

Gantt charts are used for streamlining the

Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.

Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

Preheating before welding is done to

Also checkout

What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.