Chemical Engineering MCQs

Page No. 391

Strain gage pressure transducers are used to measure _____________ pressures?


aGage as well as vacuum

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bAbsolute as well as differential

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cBoth A. and B.

✓


dNeither A. nor B.

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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

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b0

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c1

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d∞

✓


View Answer ∞

A mercury barometer measures the _____________ pressure?


aAtmospheric

✓


bGauge

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cVacuum

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dAbsolute

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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

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bDetermines its stability

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cIs the same for set point or load changes

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dAll A , B & C.

✓


View Answer All A , B & C.

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


aImpulse

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bUnit step

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cFrequency

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dNone of these

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View Answer Frequency

Polarograph is meant for the analysis of __________________?


aGaseous mixture

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bMiscible liquids

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cSolids

✓


dIsotopes

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View Answer Solids

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


aElimination of offset

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bReduction of offset

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cReduction of stability time

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dNone of these

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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

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bIron-constantan

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cChromel-constantan

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dAll will give the same output

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View Answer Chromel-constantan

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


aRoots of the characteristic equation should be real

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

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

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

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


aPressure

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bVolume

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cViscosity

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dAll A., B. and C.

✓


View Answer All A., B. and C.

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