Chemical Engineering MCQs

Page No. 831

Which of the following materials has the least scrap value ?


aAluminium


bStainless steel


cBrass


dCopper


View Answer Stainless steel

Young’s modulus of a material is the measure of its ___________________?


aStiffness


bMalleability


cCreep resistance


dTensile strength


View Answer Stiffness

Tumbling is the process of improving the ________________ of the materials/parts ?


aSurface finish


bFatigue limit


cCreep limit


dSurface cleanliness


View Answer Surface cleanliness

Which of the following is not categorised as the ore agglomeration process ?


aNodulising


bPelletising


cBalling


dBriquetting


View Answer Balling

In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?


aV2


b1/V2


c1/Vg


dVg


View Answer Vg

Sub zero treatment of steel is done to____________________?


aSuppress martensite transformation


bEnhance its working performance in sub zero atmosphere


cReduce the retained austenite in hardened steel


dInduce temper brittleness after its hardening



The most detrimental impurity in high pressure boiler feed water is ___________________?


aSuspended salt


bDissolved salt


cSilica


dTurbidity


View Answer Silica

Biological shield in a nuclear reactor is generally provided to protect against the__________________?


aα-rays


bβ-rays


cGamma rays & neutrons


dElectrons


View Answer Gamma rays & neutrons

The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by __________________?


ay2 = 2k1t + k2


by = k1 ln (k2t + k3)


cy = k1 t + k2


dy = k1t3 + k2


View Answer y2 = 2k1t + k2

Plastics as a material of construction suffer from the drawback of low_________________?


aMachinability


bDensity


cStrength


dPlastic deformation


View Answer Strength

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