Chemical Engineering MCQs

Page No. 387

Turbine flow meters are suitable for_________________?


aVery limited flow ranges

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bCryogenic flow measurements

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cAerospace and in air borne applications

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dBoth B. and C.

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View Answer Both B. and C.

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


aTeflon

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bCeramic fibre

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cAsbestos

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dFibre glass

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View Answer Ceramic fibre

Which of the following controllers has the least maximum deviation ?


aP-controller

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bP-I controller

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cP-I-D controller

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dP-D controller

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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

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bHigh thermal conductivity

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cSmall specific heat

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dAll A , B & C

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View Answer All A , B & C

Liquid levels in autoclaves are measured by ________________?


aSimple float

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bDifferential float type manometer

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cGlass gauge

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dGlass gauge

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


aReproducibility

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bSensitivity

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cDead zone

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dFidelity

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View Answer Fidelity

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


aFirst order system

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bSecond order system

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cTransportation lag

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dNone of these

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View Answer Transportation lag

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


a∫0 ∞ |e| dt

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b∫0 ∞ |e2| dt

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c∫0 ∞ e2 dt

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dNone of these

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View Answer ∫0 ∞ e2 dt

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


aOxygen in

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bCarbon dioxide in

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cCarbon monoxide in

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dTemperature of

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View Answer Oxygen in

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


aSpecially designed thermocouple

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bOptical pyrometer

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cRadiation pyrometer

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dNone of these

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View Answer Radiation pyrometer

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