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

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cTubes are placed in vertical position

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dNone of these

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


aCompletely filled

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bPartially filled

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cEqually filled

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dVacant

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View Answer Partially filled

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


aSilicon

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bCarbon

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cPhosphorous

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dChromium

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View Answer Carbon

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


aBrass

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bBronze

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cGerman silver

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dCast iron

✓


View Answer Cast iron

__________________ stress cannot be sustained by a fluid in equilibrium ?


aShear

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bTensile

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cCompressive

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dNone of these

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View Answer Shear

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


aIncreases

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bDecreases

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cRemain constant

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dIncreases to a maximum before decreasing

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View Answer Increases

Dephosphorization of molten pig iron is favoured by_______________________?


aOxidising and basic slag

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bReducing and basic slag

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cHigh activity co-efficient of phosphorous in metal

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dOxidising and neutral slag

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Metal shots used in shot blasting are made of ______________________?


aStellite

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bSteel

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cBronze

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dLead

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View Answer Steel

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


aMach

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bFroude

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cReynolds

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dEuler

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View Answer Mach

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


aPiercing

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bSpinning

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cDrawing

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dExtrusion

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View Answer Spinning

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