Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

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Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

A. Annealing

B. Toughening

C. Work hardening

D. Tempering

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Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

A. 1/k

B. k

C. k²

D. 1/k²

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Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

A. Anodising

B. Tempering

C. Carburising

D. Annealing

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__________ fluid force is not considered in the Navier-Stokes equation.

A. Turbulent

B. Viscous

C. Gravity

D. Pressure

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Corrosion is

A. A physical phenomenon

B. A chemical phenomenon

C. Same as erosion

D. An uncontrollable phenomenon

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In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

A. 20

B. 60

C. 120

D. ∞

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Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

A. Very low which prevents their ignition by compression

B. Very high which prevents their ignition by compression

C. Zero

D. None of these

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With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

A. Supercharging

B. Wall temperature

C. Compression ratio

D. Engine speed

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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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Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

A. Admiralty brass

B. Stainless steel

C. Aluminium brass

D. Titanium

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Diffusion co-efficient of a metal in a solid solution depends upon its

A. Composition

B. Temperature

C. Both (A) & (B)

D. Neither (A) nor (B)

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Current employed in resistance welding ranges from __________ kVA/.

A. 1.2 to 2.5

B. 4.5 to 6.2

C. 7.5 to 8.5

D. 10.5 to 15.5

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Which of the, following is not associated with the functioning of a petrol engine?

A. Compression ignition system

B. Spark plug

C. Carburettor

D. Otto cycle

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Which of the following is the most suitable abrasive for grinding high tensile strength materials?

A. Silicon carbide

B. Corundum

C. Aluminium oxide

D. Boron carbide

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Identify the correct statement with reference to the extractive metallurgy of aluminium.

A. The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3

B. Approximately 80% of the aluminium deposited on the cathode comes from cryolite

C. Sodium is deposited along with aluminium, but is immediately vaporised

D. Anode effect sets in when the cryolite concentration goes below 40%.

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For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

A. Reynolds number (based on sphere diameter) should be < 1

B. Flow around the sphere should be in turbulent region

C. Sphere must be metallic

D. Fluid density should be constant

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Which of the following metals reacts violently with water?

A. Mercury

B. Sodium

C. Calcium

D. Magnesium

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Which of the following is an example of stress corrosion?

A. Season cracking of brass

B. Caustic embrittlement of steel

C. Both (A) & (B)

D. Neither (A) nor (B)

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Which of the following has the highest value of refractive index?

A. Brine (sea water)

B. Diamond

C. Distilled water

D. Glass

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Viscoelastic behaviour is observed in __________ materials.

A. Non-crystalline organic polymeric

B. Ceramic

C. All crystalline

D. All amorphous

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Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

A. White

B. Cast

C. Wrought

D. Pig

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Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

A. Concentration

B. Velocity

C. Temperature

D. None of these

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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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Cupola produces __________ iron.

A. Pig

B. Cast

C. Wrought

D. Carbon free

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A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place

A. The better insulation material should be put just next to pipe (i.e., inside)

B. The better insulating material should be put outside

C. Either of the insulating material could be put on either side

D. Steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe)

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Cold heading or upsetting is categorised as the __________ process.

A. Extrusion

B. Bending

C. Rolling

D. Forging

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Laser welding is widely employed in the __________ industries.

A. Electronic

B. Structural

C. Process

D. Heavy

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A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its

A. Aqueous tension

B. Saturated humidity

C. Vapor pressure

D. Absolute humidity

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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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Which of the following hardness tests does not measure the indentation hardness of metals and alloys?

A. Vickers hardness test

B. Shore scleroscope test

C. Brinell hardness test

D. Rockwell hardness test

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The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

A. Wet bulb temperature=dry bulb temperature

B. Wet bulb temperature=dew point temperature

C. Saturation temperature=dew point temperature

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

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Accepted Answer

A. Annealing

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

__________ fluid force is not considered in the Navier-Stokes equation.

Corrosion is

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

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

Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

Diffusion co-efficient of a metal in a solid solution depends upon its

Current employed in resistance welding ranges from __________ kVA/.

Which of the, following is not associated with the functioning of a petrol engine?

Which of the following is the most suitable abrasive for grinding high tensile strength materials?

Identify the correct statement with reference to the extractive metallurgy of aluminium.

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

Which of the following metals reacts violently with water?

Which of the following is an example of stress corrosion?

Which of the following has the highest value of refractive index?

Viscoelastic behaviour is observed in __________ materials.

Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

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.

Cupola produces __________ iron.

A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place

Cold heading or upsetting is categorised as the __________ process.

Laser welding is widely employed in the __________ industries.

A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its

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

Which of the following hardness tests does not measure the indentation hardness of metals and alloys?

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

Also checkout

Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Thermal diffusivity of a substance is proportional to (where, k = Thermal conductivity)

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part?

__________ fluid force is not considered in the Navier-Stokes equation.

Corrosion is

In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is __________ °C.

Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.

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

Which of the following commonly used condenser tube materials has the lowest thermal conductivity?

Diffusion co-efficient of a metal in a solid solution depends upon its

Current employed in resistance welding ranges from __________ kVA/.

Which of the, following is not associated with the functioning of a petrol engine?

Which of the following is the most suitable abrasive for grinding high tensile strength materials?

Identify the correct statement with reference to the extractive metallurgy of aluminium.

For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

Which of the following metals reacts violently with water?

Which of the following is an example of stress corrosion?

Which of the following has the highest value of refractive index?

Viscoelastic behaviour is observed in __________ materials.

Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

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.

Cupola produces __________ iron.

A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place

Cold heading or upsetting is categorised as the __________ process.

Laser welding is widely employed in the __________ industries.

A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its

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

Which of the following hardness tests does not measure the indentation hardness of metals and alloys?

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

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.