Chemical Engineering MCQs

Page No. 382

____________ is an example of distributed parameter system ?


aTubular reactor

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bCSTR

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cOn-off controller

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dNone of these

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View Answer Tubular reactor

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


aMercury in glass thermometer

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bVapor pressure thermometer

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cResistance thermometer

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dNone of these

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View Answer None of these

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


aBubbler system

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bDifferential pressure manometer

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cDiaphragm box system

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dAir-trap system

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


aLog-lag

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bTriangular

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cOrdinary

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dSemi-log

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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

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bAir to close valve with the controller indirect acting

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cAir to open valve with the controller indirect acting

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dAir to close valve with the controller direct acting

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


aSteel

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bVycor (a glass)

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cNichrome

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dInconel

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View Answer Vycor (a glass)

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


aIncreases

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bDecreases

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cRemain constant

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dIncreases exponentially

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View Answer Decreases

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


aPlatinum resistance thermometer

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bThermocouple

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cOptical pyrometer

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dBimetallic thermometer

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View Answer Optical pyrometer

Bourdon tube is never made of________________?


aPhosphor bronze

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bMonel metal

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cStainless steel

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dCast iron

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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

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bDilatometer

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cMercury thermometer

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dBimetallic thermometer

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View Answer Beckman thermometer

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