Damage to metal surface by mechanical action is called

Question

Damage to metal surface by mechanical action is called

A. Pitting

B. Corrosion

C. Erosion

D. None of these

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__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

A. Veneering

B. Galvanising

C. Electroplating

D. Calorising

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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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Gas turbine normally employs a constant __________ cycle.

A. Pressure

B. Temperature

C. Volume

D. None of these

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Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

A. Conduction

B. Convection

C. Radiation

D. Both 'a' & 'b'

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Addition of __________ to steel does not impart hardness.

A. Nickel

B. Copper

C. Chromium

D. Silicon

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__________ of air does not increase with increase in temperature.

A. Density

B. Thermal diffusivity

C. Viscosity

D. Thermal conductivity

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__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.

A. Stellite

B. High speed steel

C. Cermet

D. Alnico

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What is the value of included angle of a triangular notch for maximum discharge?

A. 30°

B. 60°

C. 90°

D. 120°

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The most commonly used moderator in nuclear power plants is

A. Graphite

B. Light water

C. Heavy water

D. Beryllium

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Larger length & diameter water pipes are made by

A. Electrical resistance welding

B. Die casting

C. Semi-centrifugal casting

D. Continuous casting

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Holes for riveting purposes should be preferably made by

A. Cutting torch

B. Drilling

C. Punching

D. None of these

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Carbon is present in the form of __________ in grey cast iron.

A. Spheroids

B. Nodular aggregates of graphite

C. Flakes

D. Cementite

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X-rays are

A. Positively charged

B. Negatively charged

C. Neutral

D. Of higher wavelength than visible light

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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

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Lead is poured into the joints between two __________ pipes.

A. Cast iron

B. Steel

C. Concrete

D. Plastic

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What is the range of tempering temperature (°C) for most of the materials?

A. 75-100

B. 200-300

C. 350-450

D. 500-600

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Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

A. Cold

B. Work

C. Age

D. Induction

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Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

A. Black

B. Silver grey

C. Green

D. Yellow

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Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

A. +4000

B. -4000

C. 10000

D. -10000

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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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Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?

A. Air filter

B. Fuel injector

C. Exhaust silencer

D. Battery

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Which of the following materials has the poorest electrical conductivity?

A. Carbon

B. Aluminium

C. Silver

D. Stainless steel

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The following thermocouple may be used for measuring temperature upto 1873°K.

A. Chromel-alumel

B. Copper-constantan

C. Platinum-platinum rhodium

D. Iron-constantan

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The burnout heat flux in the nucleate boiling regime is not a function of the

A. Liquid density

B. Vapour density

C. Temperature difference

D. Heat of evaporation

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In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

A. More

B. Less

C. Equal

D. Much more

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The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

A. Runner

B. Cylinder

C. Mold

D. None of these

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The cathode in an electrochemical cell always carries

A. Negative charge

B. Positive charge

C. Zero charge

D. Positive or negative charge depending upon the nature of the cell

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An ideal material for making cooking vessels should have

A. High heat capacity

B. Low heat capacity

C. High thermal conductivity

D. Both (B) and (C)

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In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

A. Mechanical

B. Overall

C. Volumetric

D. Impeller

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__________ is a special constituent of chlorophyll without which photosynthesis is not possible.

A. Calcium

B. Nitrogen

C. Phosphorous

D. Hydrogen

Discuss this answer

Accepted Answer

C. Erosion

Damage to metal surface by mechanical action is called

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

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

Gas turbine normally employs a constant __________ cycle.

Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

Addition of __________ to steel does not impart hardness.

__________ of air does not increase with increase in temperature.

__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.

What is the value of included angle of a triangular notch for maximum discharge?

The most commonly used moderator in nuclear power plants is

Larger length & diameter water pipes are made by

Holes for riveting purposes should be preferably made by

Carbon is present in the form of __________ in grey cast iron.

X-rays are

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

Lead is poured into the joints between two __________ pipes.

What is the range of tempering temperature (°C) for most of the materials?

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

__________ pipe is the most suitable for carrying sanitary drainage.

Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?

Which of the following materials has the poorest electrical conductivity?

The following thermocouple may be used for measuring temperature upto 1873°K.

The burnout heat flux in the nucleate boiling regime is not a function of the

In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

The cathode in an electrochemical cell always carries

An ideal material for making cooking vessels should have

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).

__________ is a special constituent of chlorophyll without which photosynthesis is not possible.

Also checkout

Damage to metal surface by mechanical action is called

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

__________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C.

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

Gas turbine normally employs a constant __________ cycle.

Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by

Addition of __________ to steel does not impart hardness.

__________ of air does not increase with increase in temperature.

__________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.

What is the value of included angle of a triangular notch for maximum discharge?

The most commonly used moderator in nuclear power plants is

Larger length & diameter water pipes are made by

Holes for riveting purposes should be preferably made by

Carbon is present in the form of __________ in grey cast iron.

X-rays are

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

Lead is poured into the joints between two __________ pipes.

What is the range of tempering temperature (°C) for most of the materials?

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat interaction of 3000 kJ causes the surroundings to be heated. Internal energy change of the gas during the compression is __________ kJ.

__________ pipe is the most suitable for carrying sanitary drainage.

Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?

Which of the following materials has the poorest electrical conductivity?

The following thermocouple may be used for measuring temperature upto 1873°K.

The burnout heat flux in the nucleate boiling regime is not a function of the

In case of condensers & evaporators operating under given terminal conditions, LMTD (logarithmic mean temperature difference) for counter flow as compared to that for parallel flow is

The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

The cathode in an electrochemical cell always carries

An ideal material for making cooking vessels should have

In case of a, centrifugal pump, the ratio h1/h2 is termed as the __________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller).

__________ is a special constituent of chlorophyll without which photosynthesis is not possible.

Also checkout

In case of a, centrifugal pump, the ratio h₁/h₂ is termed as the __________ efficiency (where, h₁ = actual measured head & h₂ = head imparted to the fluid by impeller).