Chemical Engineering MCQs

Page No. 789

The trace metal present in insulin is____________________?


aCu


bZn


cFe


dNi


View Answer Zn

For a first order chemical reaction, the concentration of the reactant decreases __________________ with time?


aLinearly


bExponentially


cLogarithmically


dInversely


View Answer Linearly

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from _______________ percent ?


a5 to 10


b15 to 25


c45 to 50


d75 to 80


View Answer 45 to 50

Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be_______________?


aMore


bLess


cSame


dEither more or less; depends on the climatic conditions


View Answer Less

Globular form of cementite is formed during the _________________ process ?


aSpheroidising


bHardening


cAnnealing


dNormalising


View Answer Hardening

The burnout heat flux in the nucleate boiling regime is not a function of the_________________?


aLiquid density


bVapour density


cTemperature difference


dHeat of evaporation


View Answer Vapour density

Use of water as a manometric liquid suffers from the disadvantage of its____________________?


aLow vapour pressure


bCorrosive nature


cHigh vapour pressure


dHigh boiling point


View Answer High vapour pressure

Iron content in Indian iron ore is about _________________ percent?


a80-85


b60-65


c40-45


d20-25


View Answer 60-65

Shrinkage allowance on pattern is provided to compensate for shrinkage when the _____________________?


aMetal changes from liquid state to solid state at freezing temperature


bSolid phase temperature drops from freezing temperature to the room temperature


cLiquid metal temperature drops from pouring temperature to room temperature


dLiquid metal temperature drops from pouring temperature to freezing temperature



_____________________ of austenite decreases the hardenability in steel ?


aFine grains


bCoarse grains


cHomogeneity


dDissolved elements (except cobalt)



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