Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

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Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

A. Radiation

B. Conduction

C. Convection

D. Both (B) & (C)

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Magnetic permeability of iron is increased by its

A. Decarburising

B. Alloying with cobalt

C. Purification

D. Alternate heating & cooling

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The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

A. 2-5

B. 18-20

C. 12-15

D. 6-12

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Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.

A. Bomb

B. Throttling

C. Junker's

D. Boy's

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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 mainly decides the current to be employed is arc welding?

A. Electrode size

B. Plate thickness

C. Voltage across the arc

D. Welded portion length

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Spheroidising of a material is a/an __________ process.

A. Normalising

B. Annealing

C. Tempering

D. Hardening

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Water hammer is caused in steam carrying pipelines, because of

A. Partial condensation of steam

B. Vibration of the pipeline

C. High degree of superheat of steam

D. Its exposure to torrential rain

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Which of the following does not discharge the dust collected as a dry solid?

A. Electrostatic precipitator

B. Wet scrubber

C. Bag filter

D. Gravity settling chamber

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A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is

A. -0.8

B. 0.8

C. +0.08

D. -0.24

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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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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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Corrosion is

A. A physical phenomenon

B. A chemical phenomenon

C. Same as erosion

D. An uncontrollable phenomenon

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Cupola produces __________ iron.

A. Pig

B. Cast

C. Wrought

D. Carbon free

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Coating provided on the electrodes used in the arc welding is not expected to

A. Add alloying elements

B. Prevent electrode from contamination

C. Stabilise the arc

D. Provide protective atmosphere to weld

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The noble metals

A. Are exemplified by Na, K and Li

B. Do not resist corrosion very strongly

C. Are the lowermost in the electro-chemical series of metals

D. None of these

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Thermal efficiency of an internal combustion engine is around __________ percent.

A. 8

B. 35

C. 65

D. 80

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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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In the acid Bessemer process, the hot metal should have the following composition.

A. S < 0.05% and P < 0.05%

B. S < 0.05% and P < 1.5%

C. S < 0.05% and P > 1.5%

D. S > 1.5% and P < 0.05%

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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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For preparation of porous bearings by powder metallurgy, preferred particle shape is

A. Spherical

B. Nodular

C. Irregular

D. No preferred shape

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Consumable electrodes are used in the __________ welding.

A. Gas

B. Arc

C. Thermit

D. Resistance

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In practice, the compression ratio of compression-ignition (CI) engine ranges from

A. 15 to 25

B. 5 to 10

C. 40 to 55

D. 60 to 70

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The rolling process cannot be used to produce

A. Plates

B. Rods

C. Tubes

D. Wires

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An oxidation process is accompanied with decrease in the

A. Number of electrons

B. Oxidation number

C. Number of ions

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

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Laser welding is widely employed in the __________ industries.

A. Electronic

B. Structural

C. Process

D. Heavy

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With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

A. Impact strength

B. Percent elongation

C. Hardness

D. Both 'b' & 'c'

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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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What is the percentage of chromium in 18-4-1 high speed steel?

A. 1

B. 4

C. 18

D. 23

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Air-petrol ratio for maximum power generation in spark ignition engine is about

A. 6 : 1

B. 12 : 1

C. 18 : 1

D. 24 : 1

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Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

A. Atoms

B. Neutrons

C. Nucleons

D. Electrons

Discuss this answer

Accepted Answer

A. Radiation

Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Magnetic permeability of iron is increased by its

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.

Which of the following is an example of stress corrosion?

Which of the following mainly decides the current to be employed is arc welding?

Spheroidising of a material is a/an __________ process.

Water hammer is caused in steam carrying pipelines, because of

Which of the following does not discharge the dust collected as a dry solid?

A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is

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

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

Corrosion is

Cupola produces __________ iron.

Coating provided on the electrodes used in the arc welding is not expected to

The noble metals

Thermal efficiency of an internal combustion engine is around __________ percent.

Large scale fire on fuel gas line is normally extinguished by

In the acid Bessemer process, the hot metal should have the following composition.

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

For preparation of porous bearings by powder metallurgy, preferred particle shape is

Consumable electrodes are used in the __________ welding.

In practice, the compression ratio of compression-ignition (CI) engine ranges from

The rolling process cannot be used to produce

An oxidation process is accompanied with decrease in the

Laser welding is widely employed in the __________ industries.

With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

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

What is the percentage of chromium in 18-4-1 high speed steel?

Air-petrol ratio for maximum power generation in spark ignition engine is about

Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

Also checkout

Heat transfer by __________ is almost absent in case of fluidised bed drying operation.

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Magnetic permeability of iron is increased by its

The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.

Which of the following is an example of stress corrosion?

Which of the following mainly decides the current to be employed is arc welding?

Spheroidising of a material is a/an __________ process.

Water hammer is caused in steam carrying pipelines, because of

Which of the following does not discharge the dust collected as a dry solid?

A metal having a Poisson's ratio = 0.3 is elastically deformed under uniaxial tension. If the longitudinal strain = 0.8, then the magnitude of thickness strain is

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

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

Corrosion is

Cupola produces __________ iron.

Coating provided on the electrodes used in the arc welding is not expected to

The noble metals

Thermal efficiency of an internal combustion engine is around __________ percent.

Large scale fire on fuel gas line is normally extinguished by

In the acid Bessemer process, the hot metal should have the following composition.

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

For preparation of porous bearings by powder metallurgy, preferred particle shape is

Consumable electrodes are used in the __________ welding.

In practice, the compression ratio of compression-ignition (CI) engine ranges from

The rolling process cannot be used to produce

An oxidation process is accompanied with decrease in the

Laser welding is widely employed in the __________ industries.

With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and __________ is not affected.

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

What is the percentage of chromium in 18-4-1 high speed steel?

Air-petrol ratio for maximum power generation in spark ignition engine is about

Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

Also checkout

The Al₂O₃ content of cryolite in Hall- Heroult cell is maintained between __________ percent.