Chemical Engineering MCQs

Page No. 802

Brittleness induced due to the presence of sulphur in steel can be reduced by adding______________?


aManganese


bMagnesium


cVanadium


dCopper


View Answer Manganese

Closeness of packing is maximum in case of ____________________ crystal lattice?


aFace centred


bSimple cubic


cBody centred


dNone of these


View Answer Face centred

In the Bayer’s process, bauxite is digested under pressure using ___________________?


aH2SO4


bNaOH


cNH3


dHCl


View Answer NaOH

____________________ of hard alloy and tool steel is done to make it easily machinable ?


aCase carburising


bTempering


cNormalising


dAnnealing


View Answer Tempering

At 100% relative humidity, the dew point temperature of moist air is_________________?


aLess than the wet bulb temperature


bMore than the wet bulb temperature


cEqual to the wet bulb temperature


dEqual to the ambient temperature



Elimination of brittleness resulting from welding of saw blades is done by __________________ of the welded portion ?


aAnnealing


bToughening


cWork hardening


dTempering


View Answer Annealing

Maximum permissible air velocity in pipelines is about ______________ metre/second ?


a5


b10


c20


d40


View Answer 10

Resilience of a bolt can be increased by increasing its __________________?


aLength


bShank diameter


cHead diameter


dNone of these


View Answer Length

______________________ temperature remains constant during adiabatic saturation process of unsaturated air ?


aDew point


bDry bulb


cWet bulb


dNone of these


View Answer Wet bulb

The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is__________________?


aMagnesite


bChrome


cSilica


dFireclay


View Answer Silica

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