Chemical Engineering MCQs

Page No. 831

Which of the following materials has the least scrap value ?


aAluminium

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bStainless steel

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cBrass

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dCopper

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View Answer Stainless steel

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


aStiffness

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bMalleability

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cCreep resistance

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dTensile strength

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View Answer Stiffness

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


aSurface finish

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bFatigue limit

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cCreep limit

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dSurface cleanliness

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View Answer Surface cleanliness

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


aNodulising

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bPelletising

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cBalling

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dBriquetting

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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

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b1/V2

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c1/Vg

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dVg

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View Answer Vg

Sub zero treatment of steel is done to____________________?


aSuppress martensite transformation

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bEnhance its working performance in sub zero atmosphere

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cReduce the retained austenite in hardened steel

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dInduce temper brittleness after its hardening

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


aSuspended salt

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bDissolved salt

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cSilica

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dTurbidity

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View Answer Silica

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


aα-rays

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bβ-rays

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cGamma rays & neutrons

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dElectrons

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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

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by = k1 ln (k2t + k3)

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cy = k1 t + k2

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dy = k1t3 + k2

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View Answer y2 = 2k1t + k2

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


aMachinability

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bDensity

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cStrength

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dPlastic deformation

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View Answer Strength

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