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


b0.2 to 0.4


c0.5 to 0.7


d0.8 to 1.0


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


bMild steel


cHigh speed steel


dHigh carbon steel


View Answer High speed steel

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


aCondensation


bDeaeration


cScavenging


dExhaust


View Answer Deaeration

______________ cannot increase the fatigue strength of a material?


aGrain refining


bGrain coarsening


cSurface hardening


dShot peening


View Answer Grain coarsening

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


aBlow moulding


bCalendaring


cExtrusion


dInjection


View Answer Blow moulding

Coarse grained steels have____________________?


aLow toughness


bNo tendency to distort


cHigh density


dVery high toughness



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


aThermosetting polymers


bHigh carbon steels


cBrasses


dBorosilicate glasses


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


b1/√P


c√y


d1/√ρ


View Answer 1/√P

Hot & cold working of material causes its _______________ deformation?


aVisco-elastic


bIsotropic


cElastic


dPlastic


View Answer Plastic

Thermit welding is categorised as the ______________________ welding ?


aForge


bFusion


cResistance


dArc


View Answer Fusion

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