Chemical Engineering MCQs

Page No. 378

What is the Laplace transform of sin t ?


a1/(s2 + 1)


bs/(1 + s2)


c1/(s2 – 1)


ds/(s2 – 1)


View Answer 1/(s2 + 1)

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


aDielectrics


bInsulators


cSemi conductors


dConductors


View Answer Semi conductors

Gain margin is equal to the_________________?


aAmplitude ratio


bReciprocal of amplitude ratio


cGain in P controller


dGain in P-I controller



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


aMercury thermometer


bRadiation pyrometer


cBimetallic thermometer


dThermocouple


View Answer Mercury thermometer

Composition of natural gas is determined by the_________________?


aHaldane apparatus


bMass spectrometer


cChromatograph


dBoth B. and C.


View Answer Both B. and C.

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


a400-1600


b800-1600


c800-2500


d400-1000


View Answer 800-1600

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


aSolids


bAlkali metals


cNatural gas


dIsotopes


View Answer Alkali metals

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


aLoad


bManipulated


cControlled


dNone of these


View Answer Controlled

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


aHydrometer


bContact-type electric indicators


cDisplacement meter


dBoth A. and C.


View Answer Both A. and C.

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


aResistance thermometer


bThermocouple


cOptical pyrometer (disappearing filament type)


dRadiation pyrometer



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