Chemical Engineering MCQs

Page No. 776

The life of a ball bearing is inversely proportional to________________?


a(Load)1

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b(Load)2

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c(Load)3

✓


d(Load)0.33

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View Answer (Load)3

The condition of diffraction from a crystal is given by______________?


anλ = 2d Sin θ

✓


bλ = d Sin 2θ

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cλ = 2d Sin 2θ

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dnλ = d Sin θ

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View Answer nλ = 2d Sin θ

The passage between the nozzle and the _______________________ is called ‘sprue’ in case of injection moulding?


aRunner

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bCylinder

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cMold

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dNone of these

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View Answer Runner

Yield strength of a polycrystalline metal with an average grain size „d’, is proportional to ____________________?


ad1/2

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bd-1/2

✓


cd

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dd-1

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View Answer d-1/2

The behaviour of a metal specimen, which when plastically strained in tension reduces its yield stress in compression and vice versa; is termed as the_______________?


aWork hardening

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bBauschinger effect

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cCreeping effect

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dStress recovery effect

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View Answer Bauschinger effect

Which of the following properties of a solid is not dependent on crystal imperfection ?


aDuctility

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bSemi-conductivity

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cMelting point

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dYield stress

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View Answer Melting point

While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to ______________ × Tm (where, Tm Melting temperature) ?


a0.25

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b0.45

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c0.70

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d0.95

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View Answer 0.70

Electrostatic separation of minerals from each other is based on their differences in the following property ?


aDensities

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bMagnetic permeabilities

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cElectrical conductivities

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dHardness

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Age hardening is connected with________________?


aBabbitt metal

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bGun metal

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cStainless steel

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dDuralumin

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View Answer Duralumin

A compact estimate about the amount of materials handling between various work stations is obtained from the_____________________?


aGantt chart

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bBin chart

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cString diagram

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dTravel chart

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View Answer Travel chart

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