Chemical Engineering MCQs

Page No. 378

What is the Laplace transform of sin t ?


a1/(s2 + 1)

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bs/(1 + s2)

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c1/(s2 – 1)

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ds/(s2 – 1)

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View Answer 1/(s2 + 1)

Thermistors which have a very high temperature co-efficient of resistivity belong to the class of solid called________________?


aDielectrics

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bInsulators

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cSemi conductors

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dConductors

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View Answer Semi conductors

Gain margin is equal to the_________________?


aAmplitude ratio

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bReciprocal of amplitude ratio

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cGain in P controller

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dGain in P-I controller

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Which of the following shows maximum dip effect (indicating reverse direction of temperature change) ?


aMercury thermometer

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bRadiation pyrometer

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cBimetallic thermometer

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dThermocouple

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View Answer Mercury thermometer

Composition of natural gas is determined by the_________________?


aHaldane apparatus

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bMass spectrometer

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cChromatograph

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dBoth B. and C.

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View Answer Both B. and C.

Photoelectric pyrometers are suitable in the temperature range of ________________ °C?


a400-1600

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b800-1600

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c800-2500

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d400-1000

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View Answer 800-1600

Flame photometry is used for the determination of compositional analysis of_______________?


aSolids

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bAlkali metals

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cNatural gas

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dIsotopes

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View Answer Alkali metals

In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the _____________ variable?


aLoad

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bManipulated

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cControlled

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dNone of these

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View Answer Controlled

Continuous measurement of specific gravity of a liquid is done by __________________?


aHydrometer

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bContact-type electric indicators

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cDisplacement meter

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dBoth A. and C.

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View Answer Both A. and C.

Which of the following is not classified as a thermo electric pyrometer ?


aResistance thermometer

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bThermocouple

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cOptical pyrometer (disappearing filament type)

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dRadiation pyrometer

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