Chemical Engineering MCQs

Page No. 391

Strain gage pressure transducers are used to measure _____________ pressures?


aGage as well as vacuum


bAbsolute as well as differential


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches ___________________?


a-1


b0


c1


d


View Answer

A mercury barometer measures the _____________ pressure?


aAtmospheric


bGauge


cVacuum


dAbsolute


View Answer Atmospheric

The characteristic equation for the control system with a closed loop transfer function G1/1 + G2 is given by 1 + G2 = 0. The characteristic equation for the control system_________________?


aDepends only upon the open loop transfer function


bDetermines its stability


cIs the same for set point or load changes


dAll A , B & C.


View Answer All A , B & C.

Response of a system to a sinusoidal input is called _____________ response?


aImpulse


bUnit step


cFrequency


dNone of these


View Answer Frequency

Polarograph is meant for the analysis of __________________?


aGaseous mixture


bMiscible liquids


cSolids


dIsotopes


View Answer Solids

Use of I-control along with P-control facilitates ?


aElimination of offset


bReduction of offset


cReduction of stability time


dNone of these


View Answer Elimination of offset

Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?


aPlatinum-platinum + rhodium


bIron-constantan


cChromel-constantan


dAll will give the same output


View Answer Chromel-constantan

For a feed back control system to be stable, the _________________?


aRoots of the characteristic equation should be real


bPoles of the closed loop transfer function should lie in the left half of the complex plane


cBode plots of the corresponding open loop transfer function should monotonically decrease


dPoles of the closed loop transfer function should lie in the right half of the complex plane



The ____________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature ?


aPressure


bVolume


cViscosity


dAll A., B. and C.


View Answer All A., B. and C.

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