Chemical Engineering MCQs

Page No. 398

Temperature measurement by optical pyrometer is done above ____________ point, which is 1063°C ?


aAntimony


bGold


cSilver


dNickel


View Answer Gold

Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere ?


aPlatinum-platinum + rhodium


bIron-constantan


cCopper-constantan


dChromel-alumel



In an exothermic chemical reactor, the manipulated variable is the flow rate of_______________?


aCoolant


bReactants


cProduct


dNone of these


View Answer Coolant

Range of hydrogen gas constant volume thermometer is _____________ °C?


a-10 to 20


b0 to 100


c100 – 500


d400 – 1000


View Answer 0 to 100

The transfer function of a second order system is _____________________?


a1/(T2s2 + 2ξTs + 1)


b1/(T2s2 + 2Ts + 1)


c1/(T2s2 + 2ξT + 1)


dNone of these


View Answer 1/(T2s2 + 2ξTs + 1)

Which of the following thermometers is not suitable for distant reading upto 60 metres ?


aVapor pressure thermometer


bMercury in glass thermometer


cConstant volume gas thermometer


dResistance thermometer



Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity ?


aCO2


bN2


cO2


dCO


View Answer CO2

Flow rate of a river is measured by a/an____________________?


aPitot tube


bVane meter


cKennison nozzle


dOpen weir


View Answer Vane meter

Helium gas constant volume thermometer is suitable for the measurement of a temperature of ______________ °C?


a< 100


b< 0


c> 0


d> 800


View Answer < 0

To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with ________________?


aAir


bA metal powder or graphite


cOil


dMercury


View Answer Air

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