Chemical Engineering MCQs

Page No. 401

Optical activity of a solution can be determined using a ___________________?


aPolarimeter


bPolarograph


cDilatometer


dRefractometer


View Answer Polarimeter

Which of the following thermocouples can measure the maximum temperature ?


aPlatinum-rhodium


bTungsten-molybdenum


cChromel-alumel


dIron-constantan


View Answer Tungsten-molybdenum

Emf generated in a thermocouple depends on the temperature ___________________?


aOf cold junction only


bOf hot junction only


cDifference between hot and cold junctions


dDifference between cold junction and atmospheric temperature



Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?


aMercury in glass thermometer


bMercury in steel thermometer


cAlcohol in glass thermometer


dFused metal (Na or K) in steel thermometer



Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?


aWater


bMercury


cMethyl alcohol


dCarbon-tetrachloride


View Answer Mercury

Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a ________________?


aMagnetic flowmeter


bPitot tube


cFlow nozzle type flowmeter


dTurbine flowmeter


View Answer Magnetic flowmeter

pH meter has ____________________?


aOne cell


bTwo cells


cThree cells


dNo cell


View Answer Two cells

Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by _____________ effect?Peltier


aPeltier


bThomson


cSeebeck


dNone of these


View Answer Peltier

Dilatometer is used to measure __________________?


aStress


bStrain


cDeflection


dContraction/expansion due to changes in temperature



Working principle of disappearing filament type optical pyrometer is based on the ________________?


aWien’s law


bSeebeck effect


cKirchoff’s law


dPeltier effect


View Answer Wien’s law

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