Corrosion is

Question

Corrosion is

A. A physical phenomenon

B. A chemical phenomenon

C. Same as erosion

D. An uncontrollable phenomenon

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Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

A. Emissivity of pipe surface

B. Diameter & length of the pipe

C. Temperature of hot pipe surface & that of air in the room

D. None of these

Discuss this answer

Lead is added to 60:40 brass primarily to improve

A. Machinability

B. Corrosion resistance

C. Fluidity

D. Strength

Discuss this answer

__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.

A. Lancing

B. Shot peening

C. Slugging

D. Spinning

Discuss this answer

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

Out of the following, the joint produced by __________ has the lowest strength.

A. Soldering

B. Welding

C. Brazing

D. Riveting

Discuss this answer

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A. Below the yield point

B. Above the yield point

C. Below the elastic limit

D. At the elastic limit

Discuss this answer

A material subjected __________ must have high resilience.

A. Shock loading

B. Vibration

C. Fatigue

D. Tension

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

Discuss this answer

The most important consideration in value engineering is the

A. Profit maximisation

B. Customer satisfaction

C. Cost reduction

D. Process improvement

Discuss this answer

Notched bar test is used for testing the __________ of a material.

A. Impact strength

B. Endurance limit

C. Machinability

D. Corrosion resistance

Discuss this answer

Exposure to __________ accelerates the degradation of plastics.

A. Ultraviolet radiation

B. High atmospheric temperature

C. High ambient temperature

D. Damp atmosphere

Discuss this answer

Out of the following, the __________ pipe has the least corrosion resistance.

A. Mild steel

B. Copper

C. Cast iron

D. Wrought iron

Discuss this answer

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons.

A. Lack of free

B. Excess of

C. Decrease in

D. None of these

Discuss this answer

__________ circuit is most commonly used to measure strain with the help of a strain gauge.

A. Ballast

B. Voltage balancing potentiometric

C. Simple current sensitive

D. None of these

Discuss this answer

Air-petrol ratio in an automotive petrol engine is around

A. 14 : 1

B. 22 : 1

C. 25 : 1

D. 4 : 1

Discuss this answer

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

A. Tempering

B. Hardening

C. Annealing

D. Normalising

Discuss this answer

Plasma is

A. A high temperature neutral gas

B. Nothing but ionised gas

C. A source of steady and highest controllable pressure

D. Formed at very low temperature

Discuss this answer

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

A. Manganese

B. Silicon

C. Carbon

D. Vanadium

Discuss this answer

Which of the following is not a ferromagnetic material?

A. Nickel

B. Cobalt

C. Aluminium

D. Iron

Discuss this answer

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

Discuss this answer

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

A. Wood's metal

B. Babbitt metal

C. Monel metal

D. Duralumin

Discuss this answer

Electrometallurgical methods of metal extraction is normally used for those metals

A. Whose oxide/ore is not reduced by carbon

B. Which fall in the category of alkali & alkaline earth metals

C. Which stands higher in the electrochemical series of the metal

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

Discuss this answer

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

A. 15

B. 25

C. 10

D. 30

Discuss this answer

For separating small pieces of metal from engine oil of a car, the best separating technique is the

A. Chromatography

B. Evaporation

C. Filtration

D. Fractional distillation

Discuss this answer

Pick out the wrong statement.

A. Ductile fracture of a stressed material, which exhibits a large plastic deformation is commonly caused by the formation and coalescence of voids in the necked region

B. Brittle fracture is caused by the propagation of pre-existing cracks in the material and involves minimum plastic deformation

C. Fatigue fracture of a material is always brittle in nature and takes place due to the existence of line imperfections

D. Brittle materials are generally tested in tension

Discuss this answer

The order of a chemical reaction

A. Can be determined only experimentally

B. Can be determined from the stoichiometry of the reaction

C. Cannot be zero

D. Can be fractional

Discuss this answer

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

Discuss this answer

Tin based white metals are used, where bearings are subjected to

A. High pressure & load

B. Low pressure & load

C. High temperature

D. Large surface wear

Discuss this answer

Cold chisel & hammers are made of

A. High speed steel

B. High carbon steel

C. Forged steel

D. Mild steel

Discuss this answer

With increase in steam pressure, its specific volume decreases

A. Rapidly first and then slowly

B. Linearly

C. Slowly first and then rapidly

D. Exponentially

Discuss this answer

Accepted Answer

B. A chemical phenomenon

Corrosion is

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

Lead is added to 60:40 brass primarily to improve

__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.

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

Out of the following, the joint produced by __________ has the lowest strength.

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A material subjected __________ must have high resilience.

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

The most important consideration in value engineering is the

Notched bar test is used for testing the __________ of a material.

Exposure to __________ accelerates the degradation of plastics.

Out of the following, the __________ pipe has the least corrosion resistance.

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons.

__________ circuit is most commonly used to measure strain with the help of a strain gauge.

Air-petrol ratio in an automotive petrol engine is around

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

Plasma is

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

Which of the following is not a ferromagnetic material?

The cathode in an electrochemical cell always carries

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

Electrometallurgical methods of metal extraction is normally used for those metals

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.

For separating small pieces of metal from engine oil of a car, the best separating technique is the

Pick out the wrong statement.

The order of a chemical reaction

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

Tin based white metals are used, where bearings are subjected to

Cold chisel & hammers are made of

With increase in steam pressure, its specific volume decreases

Also checkout

Corrosion is

Correct Answer :

Show all Chemical Engineering Basics MCQ

Related Questions

Which of the following parameters is not responsible for the heat loss from a hot steam carrying bare pipe surface located in a room without fans?

Lead is added to 60:40 brass primarily to improve

__________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength.

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

Out of the following, the joint produced by __________ has the lowest strength.

Fatigue limit improvement by over stressing the metal by successively increasing the load is called coaxing. In fatigue failure, the material fails

A material subjected __________ must have high resilience.

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

The most important consideration in value engineering is the

Notched bar test is used for testing the __________ of a material.

Exposure to __________ accelerates the degradation of plastics.

Out of the following, the __________ pipe has the least corrosion resistance.

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in __________ electrons.

__________ circuit is most commonly used to measure strain with the help of a strain gauge.

Air-petrol ratio in an automotive petrol engine is around

Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called

Plasma is

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

Which of the following is not a ferromagnetic material?

The cathode in an electrochemical cell always carries

Which of the following low melting alloy containing bismuth and lead is used for electric fuse?

Electrometallurgical methods of metal extraction is normally used for those metals

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m2 .k), when the insulation thickness is __________ mm.

For separating small pieces of metal from engine oil of a car, the best separating technique is the

Pick out the wrong statement.

The order of a chemical reaction

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

Tin based white metals are used, where bearings are subjected to

Cold chisel & hammers are made of

With increase in steam pressure, its specific volume decreases

Also checkout

Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.