Chemical Engineering MCQs

Page No. 393

Pressure of 0.0001 absolute psi can be measured by _____________ gauge?


aMcleod


bPirani


cThermocouple


dNone of these


View Answer Mcleod

Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?


aChromel-alumel


bIron-constantan


cPlatinum-platinum + rhodium


dEither A., B. or C.



Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion ?


aNickel


bBrass


cChromel


dInvar


View Answer Brass

Which of the following is not a mechanical pressure sensing element ?


aBellows


bDiaphragm


cBourdon tube


dU-tube


View Answer U-tube

The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an _____________ thermocouple?


aChromel-alumel


bIron-constantan


cPlatinum-platinum/rhodium


dNone of these


View Answer Iron-constantan

Thermal conductivity cell is the primary element of a/an _____________ analyser?


aOxygen


bCarbon dioxide


cCarbon monoxide


dSulphur dioxide


View Answer Carbon dioxide

The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly__________________?


aLinear


bNon-linear


cParabolic


dHyperbolic


View Answer Linear

For an input forcing function, X(t) = 2t2, the Laplace transform of this function is________________?


a2/s2


b4/s2


c2/s3


d4/s3


View Answer 4/s3

Bode stability method uses ____________ loop transfer function?


aOpen


bClosed


cEither A. or B.


dNeither A. nor B.


View Answer Open

The unit step response of the transfer function 1/(s2 + 2s + 3) _______________________?


aHas a non-zero slope at the origin


bHas a damped oscillatory characteristics


cIs overdamped


dIs unstable



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