Chemical Engineering MCQs

Page No. 387

Turbine flow meters are suitable for_________________?


aVery limited flow ranges


bCryogenic flow measurements


cAerospace and in air borne applications


dBoth B. and C.


View Answer Both B. and C.

Out of the following thermocouple wire insulating material, the highest temperature rating is for________________?


aTeflon


bCeramic fibre


cAsbestos


dFibre glass


View Answer Ceramic fibre

Which of the following controllers has the least maximum deviation ?


aP-controller


bP-I controller


cP-I-D controller


dP-D controller


View Answer P-D controller

For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a__________________?


aLarge area but small mass


bHigh thermal conductivity


cSmall specific heat


dAll A , B & C


View Answer All A , B & C

Liquid levels in autoclaves are measured by ________________?


aSimple float


bDifferential float type manometer


cGlass gauge


dGlass gauge



Which of the following is the dynamic characteristics of an instrument ?


aReproducibility


bSensitivity


cDead zone


dFidelity


View Answer Fidelity

The amplitude ratio for the sinusoidal response of a _____________ is 1?


aFirst order system


bSecond order system


cTransportation lag


dNone of these


View Answer Transportation lag

Which of following error integral is considered as the best criterion in controller settings ?


a∫0 ∞ |e| dt


b∫0 ∞ |e2| dt


c∫0 ∞ e2 dt


dNone of these


View Answer ∫0 ∞ e2 dt

Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace?


aOxygen in


bCarbon dioxide in


cCarbon monoxide in


dTemperature of


View Answer Oxygen in

High temperature of around 2000°C of incandescent gas mantles is measured by a/an __________________?


aSpecially designed thermocouple


bOptical pyrometer


cRadiation pyrometer


dNone of these


View Answer Radiation pyrometer

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