Chemical Engineering MCQs

Page No. 382

____________ is an example of distributed parameter system ?


aTubular reactor


bCSTR


cOn-off controller


dNone of these


View Answer Tubular reactor

Which of the following can measure temperatures in the range of – 20 to 300°C ?


aMercury in glass thermometer


bVapor pressure thermometer


cResistance thermometer


dNone of these


View Answer None of these

The level of a liquid under pressure can be determined using___________________?


aBubbler system


bDifferential pressure manometer


cDiaphragm box system


dAir-trap system



In Bode plot, A.R. vs. w is plotted on a/an _____________ graph paper?


aLog-lag


bTriangular


cOrdinary


dSemi-log


View Answer Log-lag

Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are________________?


aAir to open valve with the controller direct acting


bAir to close valve with the controller indirect acting


cAir to open valve with the controller indirect acting


dAir to close valve with the controller direct acting



Thermal well made of _____________ gives the fastest speed of response, while measuring temperature by thermocouples?


aSteel


bVycor (a glass)


cNichrome


dInconel


View Answer Vycor (a glass)

With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer ?


aIncreases


bDecreases


cRemain constant


dIncreases exponentially


View Answer Decreases

For measuring the temperature of a red hot furnace, which is the most suitable instrument ?


aPlatinum resistance thermometer


bThermocouple


cOptical pyrometer


dBimetallic thermometer


View Answer Optical pyrometer

Bourdon tube is never made of________________?


aPhosphor bronze


bMonel metal


cStainless steel


dCast iron


View Answer Cast iron

Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a________________?


aBeckman thermometer


bDilatometer


cMercury thermometer


dBimetallic thermometer


View Answer Beckman thermometer

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