Chemical Engineering MCQs

Page No. 817

Water-tube boiler is the one, in which _____________________?


aWater passes through tubes and flue gases around it


bTube carrying hot flue gases are immersed in a pool of water


cTubes are placed in vertical position


dNone of these



Ferromagnetic materials owe their properties to __________________ inner sub-shells ?


aCompletely filled


bPartially filled


cEqually filled


dVacant


View Answer Partially filled

The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following element ?


aSilicon


bCarbon


cPhosphorous


dChromium


View Answer Carbon

Out of the following, which will fracture most readity, when hit with a hard hammer ?


aBrass


bBronze


cGerman silver


dCast iron


View Answer Cast iron

__________________ stress cannot be sustained by a fluid in equilibrium ?


aShear


bTensile


cCompressive


dNone of these


View Answer Shear

For a spontaneous natural process at constant temperature and pressure, the free energy of the system always____________________?


aIncreases


bDecreases


cRemain constant


dIncreases to a maximum before decreasing


View Answer Increases

Dephosphorization of molten pig iron is favoured by_______________________?


aOxidising and basic slag


bReducing and basic slag


cHigh activity co-efficient of phosphorous in metal


dOxidising and neutral slag



Metal shots used in shot blasting are made of ______________________?


aStellite


bSteel


cBronze


dLead


View Answer Steel

Inertial forces are obtained, when the elastic forces are multiplied by ______________ number?


aMach


bFroude


cReynolds


dEuler


View Answer Mach

Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot_____________________?


aPiercing


bSpinning


cDrawing


dExtrusion


View Answer Spinning

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