Chemical Engineering MCQs

Page No. 393

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


aMcleod

✓


bPirani

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cThermocouple

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dNone of these

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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

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bIron-constantan

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cPlatinum-platinum + rhodium

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dEither A., B. or C.

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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

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bBrass

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cChromel

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dInvar

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View Answer Brass

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


aBellows

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bDiaphragm

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cBourdon tube

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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

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bIron-constantan

✓


cPlatinum-platinum/rhodium

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dNone of these

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View Answer Iron-constantan

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


aOxygen

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bCarbon dioxide

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cCarbon monoxide

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dSulphur dioxide

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View Answer Carbon dioxide

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


aLinear

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bNon-linear

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cParabolic

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dHyperbolic

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View Answer Linear

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


a2/s2

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b4/s2

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c2/s3

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d4/s3

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View Answer 4/s3

Bode stability method uses ____________ loop transfer function?


aOpen

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bClosed

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cEither A. or B.

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dNeither A. nor B.

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View Answer Open

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


aHas a non-zero slope at the origin

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bHas a damped oscillatory characteristics

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cIs overdamped

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dIs unstable

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