Chemical Engineering MCQs

Page No. 776

The life of a ball bearing is inversely proportional to________________?


a(Load)1


b(Load)2


c(Load)3


d(Load)0.33


View Answer (Load)3

The condition of diffraction from a crystal is given by______________?


anλ = 2d Sin θ


bλ = d Sin 2θ


cλ = 2d Sin 2θ


dnλ = d Sin θ


View Answer nλ = 2d Sin θ

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


aRunner


bCylinder


cMold


dNone of these


View Answer Runner

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


ad1/2


bd-1/2


cd


dd-1


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


bBauschinger effect


cCreeping effect


dStress recovery effect


View Answer Bauschinger effect

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


aDuctility


bSemi-conductivity


cMelting point


dYield stress


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


b0.45


c0.70


d0.95


View Answer 0.70

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


aDensities


bMagnetic permeabilities


cElectrical conductivities


dHardness



Age hardening is connected with________________?


aBabbitt metal


bGun metal


cStainless steel


dDuralumin


View Answer Duralumin

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


aGantt chart


bBin chart


cString diagram


dTravel chart


View Answer Travel chart

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