Annealing of cast iron

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Annealing of cast iron

A. Softens it to facilitate machining

B. Decreases the free carbon

C. Increases the strength

D. None of these

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Dielectric

A. Is an electrical insulating material

B. Of low resistivity is preferred

C. Should have high thermal conductivity

D. Need not defy the corrosive action of chemicals

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Removal of non-condensable from steam or other vapour is termed as the __________ process.

A. Condensation

B. Deaeration

C. Scavenging

D. Exhaust

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__________ is the most important element, which controls the physical properties of steel.

A. Manganese

B. Silicon

C. Carbon

D. Vanadium

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As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

A. 110

B. 85

C. 60

D. 45

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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 refractory lining of the bottom in a basic electric arc furnace is made of

A. Silica

B. Alumina

C. Magnesia

D. Fireclay

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Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

A. 10 atm-1

B. 105 atm-1

C. 10 (dimensionless)

D. 105 (dimensionless)

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Common salt is produced from sea water in India generally by the __________ method.

A. Freeze drying

B. Solar evaporation

C. Electrolytic

D. None of these

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Brazing filler metal used for joining steel plates

A. Melts below the melting points of base metals

B. Melts below 300°C

C. Is copper phosphorous alloy

D. Is copper

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In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

A. Decrease gradually

B. Increase gradually

C. Increase rapidly

D. Remain constant

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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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Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________ respectively.

A. 70 & 30

B. 30 & 70

C. 50 & 50

D. 90 & 10

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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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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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Stainless steel is welded with difficulty because of

A. Its high melting temperature

B. Chances of cracking

C. Oxide film formation

D. Chromium carbide formation

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Which of the following heat treatment processes is usually applied to castings?

A. Tempering

B. Annealing

C. Normalising

D. Carburising

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__________ pipe is the most suitable for carrying sanitary drainage.

A. Stainless steel

B. Reinforced cement concrete

C. Cast iron

D. Asbestos cement

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Use of water as a manometric liquid suffers from the disadvantage of its

A. Low vapour pressure

B. Corrosive nature

C. High vapour pressure

D. High boiling point

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Closeness of packing is maximum in case of __________ crystal lattice.

A. Face centred

B. Simple cubic

C. Body centred

D. None of these

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Large scale fire on fuel gas line is normally extinguished by

A. Water

B. Steam

C. Foam

D. Nitrogen

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Resilience of a bolt can be increased by increasing its

A. Length

B. Shank diameter

C. Head diameter

D. None of these

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The approximate height of a blast furnace having a useful volume of 2000 m³ is about __________ metres

A. 25

B. 35

C. 55

D. 75

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__________ of hard alloy and tool steel is done to make it easily machinable.

A. Case carburising

B. Tempering

C. Normalising

D. Annealing

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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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The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the

A. Final control element

B. On-off control

C. Floating control action

D. None of these

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According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

A. 180°

B. 212°

C. 32°

D. 273°

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Maximum permissible sulphur content in steel is __________ percent.

A. 0.015

B. 0.055

C. 0.505

D. 0.805

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The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by

A.

B.

C.

D.

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'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

A. Petrol

B. LPG

C. Light hydrocarbon gases (e.g. butane or propane)

D. None of these

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What happens, when SO₂ is passed through a solution of H2S in water?

A. Precipitation of sulphur takes place

B. H₂SO₃ is formed

C. Oleum is formed

D. None of these

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Accepted Answer

A. Softens it to facilitate machining

Annealing of cast iron

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Dielectric

Removal of non-condensable from steam or other vapour is termed as the __________ process.

__________ is the most important element, which controls the physical properties of steel.

As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

Uniform ramming of sand in green sand moulding process leads to

The refractory lining of the bottom in a basic electric arc furnace is made of

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

Common salt is produced from sea water in India generally by the __________ method.

Brazing filler metal used for joining steel plates

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

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

Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________ respectively.

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

Normalising does not __________ of a metal.

Stainless steel is welded with difficulty because of

Which of the following heat treatment processes is usually applied to castings?

__________ pipe is the most suitable for carrying sanitary drainage.

Use of water as a manometric liquid suffers from the disadvantage of its

Closeness of packing is maximum in case of __________ crystal lattice.

Large scale fire on fuel gas line is normally extinguished by

Resilience of a bolt can be increased by increasing its

The approximate height of a blast furnace having a useful volume of 2000 m³ is about __________ metres

__________ of hard alloy and tool steel is done to make it easily machinable.

Which of the following materials has the maximum shrinkage allowance?

The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the

According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

Maximum permissible sulphur content in steel is __________ percent.

The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

What happens, when SO₂ is passed through a solution of H2S in water?

Also checkout

Annealing of cast iron

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Dielectric

Removal of non-condensable from steam or other vapour is termed as the __________ process.

__________ is the most important element, which controls the physical properties of steel.

As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

Uniform ramming of sand in green sand moulding process leads to

The refractory lining of the bottom in a basic electric arc furnace is made of

Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

Common salt is produced from sea water in India generally by the __________ method.

Brazing filler metal used for joining steel plates

In a boundary layer developed along the flow, the pressure decreases in the downstream direction. The boundary layer thickness in this case will

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

Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________ respectively.

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

Normalising does not __________ of a metal.

Stainless steel is welded with difficulty because of

Which of the following heat treatment processes is usually applied to castings?

__________ pipe is the most suitable for carrying sanitary drainage.

Use of water as a manometric liquid suffers from the disadvantage of its

Closeness of packing is maximum in case of __________ crystal lattice.

Large scale fire on fuel gas line is normally extinguished by

Resilience of a bolt can be increased by increasing its

The approximate height of a blast furnace having a useful volume of 2000 m3 is about __________ metres

__________ of hard alloy and tool steel is done to make it easily machinable.

Which of the following materials has the maximum shrinkage allowance?

The mechanism which changes the value of manipulated variable in response to the output signal from the control unit is called the

According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

Maximum permissible sulphur content in steel is __________ percent.

The thickness of oxide film is y at time t. If are the temperature dependent constants, the parabolic law of oxidation is given by

'GASOHOL' widely used in Brazil as a motor fuel is a mixture of alcohol and

What happens, when SO2 is passed through a solution of H2S in water?

Also checkout

The approximate height of a blast furnace having a useful volume of 2000 m³ is about __________ metres

What happens, when SO₂ is passed through a solution of H2S in water?