Chemical Engineering MCQs

Page No. 386

Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit ?


aSeebeck effect


bPeltier effect


cJoule heating effect


dThomson effect


View Answer Peltier effect

The term analogous to the electrical current in a thermal system is the_________________?


aTemperature difference


bHeat flow rate


cHeat content in the system


dNone of these


View Answer Heat flow rate

The open loop transfer function of a control system is KR/(1 + TS). This represents ______________?


aA first order system


bDead time system


cA first order time lag


dA second order system


View Answer A first order system

Dilute wine was used as a thermometric liquid initially to develop temperature scale. First empirical temperature scale developed was the _____________ scale?


aKelvin


bCentigrade


cFahrenheit


dReaumer


View Answer Fahrenheit

____________ are analysed using a Polarograph?


aIsotonic solutions


bSolids


cLiquids


dGases


View Answer Solids

Polarisation of light forms the working principle of a______________?


aPolarimeter


bPolarograph


cChromatograph


dSpectrometer


View Answer Polarimeter

The transfer function for a PID controller is (where, η i is the integral (reset) time and ηD is the derivative time.) ?


aKc(1 + ηis + ηD ). s


bKc[1 + (1/ηis) + ηD . s)


cKc(1 + ηis + (1/ηD . s)


dNone of these



Stalagmometer is used for the measurement of__________________?


aKinematic viscosity


bSurface tension


cRefractive index


dOptical activity


View Answer Surface tension

Gas analysis is commonly done using the___________________?


aThermal conductivity cell


bX-ray diffraction


cMass spectrometer


dEmission spectrometer



Load cells are used for the measurement of __________________?


aStress


bWeight


cStrain


dVelocity


View Answer Weight

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