Chemical Engineering MCQs

Page No. 770

Liquor poisoning generally occurs due to the presence of _______________ in it?


aEthyl alcohol

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bImpurities

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cMethyl alcohol

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dCarbonic acid

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View Answer Methyl alcohol

Heat required to raise the temperature of a body by 1 °C is called its_______________?


aHeat capacity

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bSpecific heat capacity

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cThermal conductivity

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dWater equivalent

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View Answer Heat capacity

Solute atoms which cause yield point phenomenon in mild steel are/is_________________?


aAluminium

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bBoron

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cCarbon

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dNitrogen

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View Answer Carbon

‘Flare tower’ used in industry is meant for_____________________?


aVenting off (after burning) the excess inflammable/toxic gases at high pressure

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bAbsorbing the pollutant gases from the furnace exhaust

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cCooling of furnace exhaust gases

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dNone of these

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The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K) ?


aT

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b1/T

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cT2

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d1/T2

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View Answer T

Common salt is produced from sea water in India generally by the ________________ method?


aFreeze drying

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bSolar evaporation

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cElectrolytic

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dNone of these

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View Answer Solar evaporation

Which of the following phenomenon/ phenomena is/are diffusion controlled ?


aDislocation climb

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bCross-slip

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cTwinning

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dRecrystallisation

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View Answer Recrystallisation

Air/fuel ratio on molar (volume) basis for combustion of methane with theoretical quantity of air with be________________?


a9.5 : 1

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b12.5 : 1

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c15.5 : 1

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d18.5 : 1

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View Answer 9.5 : 1

Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother ?


aCresylic acid

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bXanthaies

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cPine oil

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dAll A, B. & C.

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View Answer Xanthaies

While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous or crystalline. The crystalline polymers are characterized by the ?


aLow impact strength

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bHigh flexibility

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cBetter finish and surface appearance

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dHigh plastic deformation

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View Answer Low impact strength

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