Chemical Engineering MCQs

Page No. 764

Maximum change in the hardness of martensite occurs in the carbon content range of _____________ percent in steel?


a0.01 to 0.10

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b0.2 to 0.4

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c0.5 to 0.7

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d0.8 to 1.0

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View Answer 0.2 to 0.4

In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of_________________?


aStainless steel

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bMild steel

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cHigh speed steel

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dHigh carbon steel

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View Answer High speed steel

Removal of non-condensable from steam or other vapour is termed as the ________________ process?


aCondensation

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bDeaeration

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cScavenging

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dExhaust

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View Answer Deaeration

______________ cannot increase the fatigue strength of a material?


aGrain refining

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bGrain coarsening

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cSurface hardening

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dShot peening

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View Answer Grain coarsening

Production of a hollow product by inflation of a tube or parison is called the _______________ process?


aBlow moulding

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bCalendaring

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cExtrusion

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dInjection

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View Answer Blow moulding

Coarse grained steels have____________________?


aLow toughness

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bNo tendency to distort

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cHigh density

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dVery high toughness

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A form of stress corrosion failure termed as ‘season cracking’ is generally observed in __________________?


aThermosetting polymers

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bHigh carbon steels

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cBrasses

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dBorosilicate glasses

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View Answer Brasses

Velocity of a gas in sound is not proportional to (where, T = Absolute temperature of the gas. P = Absolute pressure of the gas. y = Ratio of specific heats (Cp/Cv) ρ = specific weight of the gas) ?


a√T

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b1/√P

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c√y

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d1/√ρ

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View Answer 1/√P

Hot & cold working of material causes its _______________ deformation?


aVisco-elastic

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bIsotropic

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cElastic

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dPlastic

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View Answer Plastic

Thermit welding is categorised as the ______________________ welding ?


aForge

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bFusion

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cResistance

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dArc

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View Answer Fusion

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